Merge branch 'dev' into multibyte-paths

Add basic sanity test github PR workflow

.devcontainer/devcontainer.json

@@ -0,0 +1,45 @@
+{
+	"name": "MeshCore",
+	"image": "mcr.microsoft.com/devcontainers/python:3-bookworm",
+	"features": {
+		"ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+			"packages": [
+				"sudo"
+			]
+		}
+	},
+	"runArgs": [
+		"--privileged",
+		"--network=host",
+		"--volume=/dev/bus/usb:/dev/bus/usb:ro",
+		// arch tty* is owned by uucp (986)
+		// debian tty* is owned by dialout (20)
+		"--group-add=20",
+		"--group-add=986"
+	],
+	"postCreateCommand": {
+		"platformio": "pipx install platformio"
+	},
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"platformio-ide.disablePIOHomeStartup": true,
+				"editor.formatOnSave": false,
+				"workbench.colorCustomizations": {
+					"titleBar.activeBackground": "#0d1a2b",
+					"titleBar.activeForeground": "#ffffff",
+					"titleBar.inactiveBackground": "#0d1a2b99",
+					"titleBar.inactiveForeground": "#ffffff99"
+				}
+			},
+			"extensions": [
+				"platformio.platformio-ide",
+				"github.vscode-github-actions",
+				"GitHub.vscode-pull-request-github"
+			],
+			"unwantedRecommendations": [
+				"ms-vscode.cpptools-extension-pack"
+			]
+		}
+	}
+}

.github/workflows/pr-build-check.yml

@@ -0,0 +1,43 @@
+name: PR Build Check
+
+on:
+  pull_request:
+    branches: [main, dev]
+    paths:
+      - 'src/**'
+      - 'examples/**'
+      - 'variants/**'
+      - 'platformio.ini'
+      - '.github/workflows/pr-build-check.yml'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        environment:
+          # ESP32-S3 (most common platform)
+          - Heltec_v3_companion_radio_ble
+          - Heltec_v3_repeater
+          - Heltec_v3_room_server
+          # nRF52
+          - RAK_4631_companion_radio_ble
+          - RAK_4631_repeater
+          - RAK_4631_room_server
+          # RP2040
+          - PicoW_repeater
+          # STM32
+          - wio-e5-mini_repeater
+          # ESP32-C6
+          - LilyGo_Tlora_C6_repeater_
+
+    steps:
+      - name: Clone Repo
+        uses: actions/checkout@v4
+
+      - name: Setup Build Environment
+        uses: ./.github/actions/setup-build-environment
+
+      - name: Build ${{ matrix.environment }}
+        run: pio run -e ${{ matrix.environment }}

.gitignore

@@ -14,3 +14,5 @@ cmake-*
 .cache
 .ccls
 compile_commands.json
+.venv/
+venv/

README.md

@@ -39,9 +39,11 @@ For developers;
 - Clone and open the MeshCore repository in Visual Studio Code.
 - See the example applications you can modify and run:
   - [Companion Radio](./examples/companion_radio) - For use with an external chat app, over BLE, USB or WiFi.
+  - [KISS Modem](./examples/kiss_modem) - Serial KISS protocol bridge for host applications. ([protocol docs](./docs/kiss_modem_protocol.md))
   - [Simple Repeater](./examples/simple_repeater) - Extends network coverage by relaying messages.
   - [Simple Room Server](./examples/simple_room_server) - A simple BBS server for shared Posts.
   - [Simple Secure Chat](./examples/simple_secure_chat) - Secure terminal based text communication between devices.
+  - [Simple Sensor](./examples/simple_sensor) - Remote sensor node with telemetry and alerting.
 
 The Simple Secure Chat example can be interacted with through the Serial Monitor in Visual Studio Code, or with a Serial USB Terminal on Android.
 
@@ -89,7 +91,7 @@ Please submit PR's using 'dev' as the base branch!
 For minor changes just submit your PR and I'll try to review it, but for anything more 'impactful' please open an Issue first and start a discussion. Is better to sound out what it is you want to achieve first, and try to come to a consensus on what the best approach is, especially when it impacts the structure or architecture of this codebase.
 
 Here are some general principals you should try to adhere to:
-* Keep it simple. Please, don't think like a high-level lang programmer. Think embedded, and keep code concise, without any unecessary layers.
+* Keep it simple. Please, don't think like a high-level lang programmer. Think embedded, and keep code concise, without any unnecessary layers.
 * No dynamic memory allocation, except during setup/begin functions.
 * Use the same brace and indenting style that's in the core source modules. (A .clang-format is prob going to be added soon, but please do NOT retroactively re-format existing code. This just creates unnecessary diffs that make finding problems harder)
 
@@ -106,7 +108,7 @@ There are a number of fairly major features in the pipeline, with no particular
 - [ ] Core + Apps: support for LZW message compression
 - [ ] Core: dynamic CR (Coding Rate) for weak vs strong hops
 - [ ] Core: new framework for hosting multiple virtual nodes on one physical device
-- [ ] V2 protocol spec: discussion and concensus around V2 packet protocol, including path hashes, new encryption specs, etc
+- [ ] V2 protocol spec: discussion and consensus around V2 packet protocol, including path hashes, new encryption specs, etc
 
 ## 📞 Get Support
 

arch/nrf52/extra_scripts/patch_bluefruit.py

@@ -0,0 +1,198 @@
+"""
+Bluefruit BLE Patch Script
+
+Patches Bluefruit library to fix semaphore leak bug that causes device lockup
+when BLE central disconnects unexpectedly (e.g., going out of range, supervision timeout).
+
+Patches applied:
+1. BLEConnection.h: Add _hvn_qsize member to track semaphore queue size
+2. BLEConnection.cpp: Store hvn_qsize and restore semaphore on disconnect
+
+Bug description:
+- When a BLE central disconnects unexpectedly (reason=8 supervision timeout),
+  the BLE_GATTS_EVT_HVN_TX_COMPLETE event may never fire
+- This leaves the _hvn_sem counting semaphore in a decremented state
+- Since BLEConnection objects are reused (destructor never called), the
+  semaphore count is never restored
+- Eventually all semaphore counts are exhausted and notify() blocks/fails
+
+"""
+
+from pathlib import Path
+
+Import("env")  # pylint: disable=undefined-variable
+
+
+def _patch_ble_connection_header(source: Path) -> bool:
+    """
+    Add _hvn_qsize member variable to BLEConnection class.
+    
+    This is needed to restore the semaphore to its correct count on disconnect.
+    
+    Returns True if patch was applied or already applied, False on error.
+    """
+    try:
+        content = source.read_text()
+        
+        # Check if already patched
+        if "_hvn_qsize" in content:
+            return True  # Already patched
+        
+        # Find the location to insert - after _phy declaration
+        original_pattern = '''    uint8_t  _phy;
+
+    uint8_t  _role;'''
+        
+        patched_pattern = '''    uint8_t  _phy;
+    uint8_t  _hvn_qsize;
+
+    uint8_t  _role;'''
+        
+        if original_pattern not in content:
+            print("Bluefruit patch: WARNING - BLEConnection.h pattern not found")
+            return False
+        
+        content = content.replace(original_pattern, patched_pattern)
+        source.write_text(content)
+        
+        # Verify
+        if "_hvn_qsize" not in source.read_text():
+            return False
+        
+        return True
+    except Exception as e:
+        print(f"Bluefruit patch: ERROR patching BLEConnection.h: {e}")
+        return False
+
+
+def _patch_ble_connection_source(source: Path) -> bool:
+    """
+    Patch BLEConnection.cpp to:
+    1. Store hvn_qsize in constructor
+    2. Restore _hvn_sem semaphore to full count on disconnect
+    
+    Returns True if patch was applied or already applied, False on error.
+    """
+    try:
+        content = source.read_text()
+        
+        # Check if already patched (look for the restore loop)
+        if "uxSemaphoreGetCount(_hvn_sem)" in content:
+            return True  # Already patched
+        
+        # Patch 1: Store queue size in constructor
+        constructor_original = '''  _hvn_sem   = xSemaphoreCreateCounting(hvn_qsize, hvn_qsize);'''
+        
+        constructor_patched = '''  _hvn_qsize = hvn_qsize;
+  _hvn_sem   = xSemaphoreCreateCounting(hvn_qsize, hvn_qsize);'''
+        
+        if constructor_original not in content:
+            print("Bluefruit patch: WARNING - BLEConnection.cpp constructor pattern not found")
+            return False
+        
+        content = content.replace(constructor_original, constructor_patched)
+        
+        # Patch 2: Restore semaphore on disconnect
+        disconnect_original = '''    case BLE_GAP_EVT_DISCONNECTED:
+      // mark as disconnected
+      _connected = false;
+    break;'''
+        
+        disconnect_patched = '''    case BLE_GAP_EVT_DISCONNECTED:
+      // Restore notification semaphore to full count
+      // This fixes lockup when disconnect occurs with notifications in flight
+      while (uxSemaphoreGetCount(_hvn_sem) < _hvn_qsize) {
+        xSemaphoreGive(_hvn_sem);
+      }
+      // Release indication semaphore if waiting
+      if (_hvc_sem) {
+        _hvc_received = false;
+        xSemaphoreGive(_hvc_sem);
+      }
+      // mark as disconnected
+      _connected = false;
+    break;'''
+        
+        if disconnect_original not in content:
+            print("Bluefruit patch: WARNING - BLEConnection.cpp disconnect pattern not found")
+            return False
+        
+        content = content.replace(disconnect_original, disconnect_patched)
+        source.write_text(content)
+        
+        # Verify
+        verify_content = source.read_text()
+        if "uxSemaphoreGetCount(_hvn_sem)" not in verify_content:
+            return False
+        if "_hvn_qsize = hvn_qsize" not in verify_content:
+            return False
+        
+        return True
+    except Exception as e:
+        print(f"Bluefruit patch: ERROR patching BLEConnection.cpp: {e}")
+        return False
+
+
+def _apply_bluefruit_patches(target, source, env):  # pylint: disable=unused-argument
+    framework_path = env.get("PLATFORMFW_DIR")
+    if not framework_path:
+        framework_path = env.PioPlatform().get_package_dir("framework-arduinoadafruitnrf52")
+
+    if not framework_path:
+        print("Bluefruit patch: ERROR - framework directory not found")
+        env.Exit(1)
+        return
+
+    framework_dir = Path(framework_path)
+    bluefruit_lib = framework_dir / "libraries" / "Bluefruit52Lib" / "src"
+    patch_failed = False
+    
+    # Patch BLEConnection.h
+    conn_header = bluefruit_lib / "BLEConnection.h"
+    if conn_header.exists():
+        before = conn_header.read_text()
+        success = _patch_ble_connection_header(conn_header)
+        after = conn_header.read_text()
+        
+        if success:
+            if before != after:
+                print("Bluefruit patch: OK - Applied BLEConnection.h fix (added _hvn_qsize member)")
+            else:
+                print("Bluefruit patch: OK - BLEConnection.h already patched")
+        else:
+            print("Bluefruit patch: FAILED - BLEConnection.h")
+            patch_failed = True
+    else:
+        print(f"Bluefruit patch: ERROR - BLEConnection.h not found at {conn_header}")
+        patch_failed = True
+    
+    # Patch BLEConnection.cpp
+    conn_source = bluefruit_lib / "BLEConnection.cpp"
+    if conn_source.exists():
+        before = conn_source.read_text()
+        success = _patch_ble_connection_source(conn_source)
+        after = conn_source.read_text()
+        
+        if success:
+            if before != after:
+                print("Bluefruit patch: OK - Applied BLEConnection.cpp fix (restore semaphore on disconnect)")
+            else:
+                print("Bluefruit patch: OK - BLEConnection.cpp already patched")
+        else:
+            print("Bluefruit patch: FAILED - BLEConnection.cpp")
+            patch_failed = True
+    else:
+        print(f"Bluefruit patch: ERROR - BLEConnection.cpp not found at {conn_source}")
+        patch_failed = True
+    
+    if patch_failed:
+        print("Bluefruit patch: CRITICAL - Patch failed! Build aborted.")
+        env.Exit(1)
+
+
+# Register the patch to run before build
+bluefruit_action = env.VerboseAction(_apply_bluefruit_patches, "Applying Bluefruit BLE patches...")
+env.AddPreAction("$BUILD_DIR/${PROGNAME}.elf", bluefruit_action)
+
+# Also run immediately to patch before any compilation
+_apply_bluefruit_patches(None, None, env)

boards/esp32-s3-zero.json

@@ -0,0 +1,40 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "esp32s3_out.ld"
+    },
+    "core": "esp32",
+    "extra_flags": [
+      "-D ARDUINO_USB_CDC_ON_BOOT=1",
+      "-D ARDUINO_USB_MSC_ON_BOOT=0",
+      "-D ARDUINO_USB_DFU_ON_BOOT=0",
+      "-D ARDUINO_USB_MODE=1",
+      "-D ARDUINO_RUNNING_CORE=1",
+      "-D ARDUINO_EVENT_RUNNING_CORE=1"
+    ],
+    "f_cpu": "240000000L",
+    "f_flash": "80000000L",
+    "flash_mode": "qio",
+    "hwids": [["0x303A", "0x1001"]],
+    "mcu": "esp32s3",
+    "variant": "esp32s3"
+  },
+  "connectivity": ["wifi", "bluetooth"],
+  "debug": {
+    "default_tool": "esp-builtin",
+    "onboard_tools": ["esp-builtin"],
+    "openocd_target": "esp32s3.cfg"
+  },
+  "frameworks": ["arduino", "espidf"],
+  "name": "ESP32-S3-Zero",
+  "upload": {
+    "flash_size": "4MB",
+    "maximum_ram_size": 327680,
+    "maximum_size": 4194304,
+    "require_upload_port": true,
+    "speed": 921600
+  },
+  "url": "https://www.espressif.com",
+  "vendor": "Espressif"
+}
+

boards/keepteen_lt1.json

@@ -0,0 +1,79 @@
+{
+    "build": {
+      "arduino":{
+        "ldscript": "nrf52840_s140_v6.ld"
+      },
+      "core": "nRF5",
+      "cpu": "cortex-m4",
+      "extra_flags": "-DARDUINO_NRF52840_FEATHER -DNRF52840_XXAA",
+      "f_cpu": "64000000L",
+      "hwids": [
+        [
+          "0x239A",
+          "0x00B3"
+        ],
+        [
+          "0x239A",
+          "0x8029"
+        ],
+        [
+          "0x239A",
+          "0x0029"
+        ],
+        [
+          "0x239A",
+          "0x002A"
+        ],
+        [
+          "0x239A",
+          "0x802A"
+        ]
+      ],
+      "usb_product": "Keepteen LT1",
+      "mcu": "nrf52840",
+      "variant": "Keepteen LT1",
+      "variants_dir": "variants",
+      "bsp": {
+        "name": "adafruit"
+      },
+      "softdevice": {
+        "sd_flags": "-DS140",
+        "sd_name": "s140",
+        "sd_version": "6.1.1",
+        "sd_fwid": "0x00B6"
+      },
+      "bootloader": {
+        "settings_addr": "0xFF000"
+      }
+    },
+    "connectivity": [
+      "bluetooth"
+    ],
+    "debug": {
+      "jlink_device": "nRF52840_xxAA",
+      "svd_path": "nrf52840.svd",
+      "openocd_target": "nrf52.cfg"
+    },
+    "frameworks": [
+      "arduino",
+      "zephyr"
+    ],
+    "name": "Keepteen LT1",
+    "upload": {
+      "maximum_ram_size": 248832,
+      "maximum_size": 815104,
+      "speed": 115200,
+      "protocol": "nrfutil",
+      "protocols": [
+        "jlink",
+        "nrfjprog",
+        "nrfutil",
+        "stlink"
+      ],
+      "use_1200bps_touch": true,
+      "require_upload_port": true,
+      "wait_for_upload_port": true
+    },
+    "url": "http://www.keepteen.com/",
+    "vendor": "Keepteen"
+  }

boards/meshtiny.json

@@ -0,0 +1,74 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "nrf52840_s140_v6.ld"
+    },
+    "core": "nRF5",
+    "cpu": "cortex-m4",
+    "extra_flags": "-DARDUINO_NRF52840_FEATHER -DNRF52840_XXAA",
+    "f_cpu": "64000000L",
+    "hwids": [
+      [
+        "0x239A",
+        "0x8029"
+      ],
+      [
+        "0x239A",
+        "0x0029"
+      ],
+      [
+        "0x239A",
+        "0x002A"
+      ],
+      [
+        "0x239A",
+        "0x802A"
+      ]
+    ],
+    "usb_product": "Meshtiny",
+    "mcu": "nrf52840",
+    "variant": "meshtiny",
+    "bsp": {
+      "name": "adafruit"
+    },
+    "softdevice": {
+      "sd_flags": "-DS140",
+      "sd_name": "s140",
+      "sd_version": "6.1.1",
+      "sd_fwid": "0x00B6"
+    },
+    "bootloader": {
+      "settings_addr": "0xFF000"
+    }
+  },
+  "connectivity": [
+    "bluetooth"
+  ],
+  "debug": {
+    "jlink_device": "nRF52840_xxAA",
+    "svd_path": "nrf52840.svd",
+    "openocd_target": "nrf52840-mdk-rs"
+  },
+  "frameworks": [
+    "arduino",
+    "freertos"
+  ],
+  "name": "Meshtiny",
+  "upload": {
+    "maximum_ram_size": 248832,
+    "maximum_size": 815104,
+    "speed": 115200,
+    "protocol": "nrfutil",
+    "protocols": [
+      "jlink",
+      "nrfjprog",
+      "nrfutil",
+      "stlink"
+    ],
+    "use_1200bps_touch": true,
+    "require_upload_port": true,
+    "wait_for_upload_port": true
+  },
+  "url": "https://shop.mtoolstec.com/product/meshtiny",
+  "vendor": "MTools Tec"
+}

boards/rak3401.json

@@ -0,0 +1,72 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "nrf52840_s140_v6.ld"
+    },
+    "core": "nRF5",
+    "cpu": "cortex-m4",
+    "extra_flags": "-DARDUINO_NRF52840_FEATHER -DNRF52840_XXAA",
+    "f_cpu": "64000000L",
+    "hwids": [
+      [
+        "0x239A",
+        "0x8029"
+      ],
+      [
+        "0x239A",
+        "0x0029"
+      ],
+      [
+        "0x239A",
+        "0x002A"
+      ],
+      [
+        "0x239A",
+        "0x802A"
+      ]
+    ],
+    "usb_product": "WisCore RAK3401 Board",
+    "mcu": "nrf52840",
+    "variant": "WisCore_RAK3401_Board",
+    "bsp": {
+      "name": "adafruit"
+    },
+    "softdevice": {
+      "sd_flags": "-DS140",
+      "sd_name": "s140",
+      "sd_version": "6.1.1",
+      "sd_fwid": "0x00B6"
+    },
+    "bootloader": {
+      "settings_addr": "0xFF000"
+    }
+  },
+  "connectivity": [
+    "bluetooth"
+  ],
+  "debug": {
+    "jlink_device": "nRF52840_xxAA",
+    "svd_path": "nrf52840.svd"
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "WisCore RAK3401 Board",
+  "upload": {
+    "maximum_ram_size": 248832,
+    "maximum_size": 815104,
+    "speed": 115200,
+    "protocol": "nrfutil",
+    "protocols": [
+      "jlink",
+      "nrfjprog",
+      "nrfutil",
+      "stlink"
+    ],
+    "use_1200bps_touch": true,
+    "require_upload_port": true,
+    "wait_for_upload_port": true
+  },
+  "url": "https://www.rakwireless.com",
+  "vendor": "RAKwireless"
+}

boards/t_beam_1w.json

@@ -0,0 +1,50 @@
+{
+    "build": {
+        "arduino": {
+            "ldscript": "esp32s3_out.ld",
+            "memory_type": "qio_opi"
+        },
+        "core": "esp32",
+        "extra_flags": [
+            "-DBOARD_HAS_PSRAM",
+            "-DLILYGO_TBEAM_1W",
+            "-DARDUINO_USB_CDC_ON_BOOT=1",
+            "-DARDUINO_USB_MODE=0",
+            "-DARDUINO_RUNNING_CORE=1",
+            "-DARDUINO_EVENT_RUNNING_CORE=1"
+        ],
+        "f_cpu": "240000000L",
+        "f_flash": "80000000L",
+        "flash_mode": "qio",
+        "psram_type": "opi",
+        "hwids": [
+            [
+                "0x303A",
+                "0x1001"
+            ]
+        ],
+        "mcu": "esp32s3",
+        "variant": "lilygo_tbeam_1w"
+    },
+    "connectivity": [
+        "wifi",
+        "bluetooth",
+        "lora"
+    ],
+    "debug": {
+        "openocd_target": "esp32s3.cfg"
+    },
+    "frameworks": [
+        "arduino"
+    ],
+    "name": "LilyGo TBeam-1W",
+    "upload": {
+        "flash_size": "16MB",
+        "maximum_ram_size": 327680,
+        "maximum_size": 16777216,
+        "require_upload_port": true,
+        "speed": 921600
+    },
+    "url": "http://www.lilygo.cn/",
+    "vendor": "LilyGo"
+}

boards/t_beams3_supreme.json

@@ -41,7 +41,7 @@
     "name": "LilyGo T-Beam supreme (8MB Flash 8MB PSRAM)",
     "upload": {
       "flash_size": "8MB",
-      "maximum_ram_size": 327680,
+      "maximum_ram_size": 8388608,
       "maximum_size": 8388608,
       "require_upload_port": true,
       "speed": 460800

boards/thinknode_m3.json

@@ -0,0 +1,72 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "nrf52840_s140_v6.ld"
+    },
+    "core": "nRF5",
+    "cpu": "cortex-m4",
+    "extra_flags": "-DNRF52840_XXAA",
+    "f_cpu": "64000000L",
+    "hwids": [
+      [
+        "0x239A",
+        "0x4405"
+      ],
+      [
+        "0x239A",
+        "0x0029"
+      ],
+      [
+        "0x239A",
+        "0x002A"
+      ]
+    ],
+    "usb_product": "elecrow_eink",
+    "mcu": "nrf52840",
+    "variant": "ELECROW-ThinkNode-M3",
+    "bsp": {
+      "name": "adafruit"
+    },
+    "softdevice": {
+      "sd_flags": "-DS140",
+      "sd_name": "s140",
+      "sd_version": "6.1.1",
+      "sd_fwid": "0x00B6"
+    },
+    "bootloader": {
+      "settings_addr": "0xFF000"
+    }
+  },
+  "connectivity": [
+    "bluetooth"
+  ],
+  "debug": {
+    "jlink_device": "nRF52840_xxAA",
+    "onboard_tools": [
+      "jlink"
+    ],
+    "svd_path": "nrf52840.svd",
+    "openocd_target": "nrf52.cfg"
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "elecrow nrf",
+  "upload": {
+    "maximum_ram_size": 248832,
+    "maximum_size": 815104,
+    "speed": 115200,
+    "use_1200bps_touch": true,
+    "require_upload_port": true,
+    "wait_for_upload_port": true,
+    "protocol": "nrfutil",
+    "protocols": [
+      "jlink",
+      "nrfjprog",
+      "nrfutil",
+      "stlink"
+    ]
+  },
+  "url": "https://github.com/Elecrow-RD",
+  "vendor": "ELECROW"
+}

boards/thinknode_m6.json

@@ -0,0 +1,72 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "nrf52840_s140_v6.ld"
+    },
+    "core": "nRF5",
+    "cpu": "cortex-m4",
+    "extra_flags": "-DARDUINO_NRF52840_ELECROW_M6 -DNRF52840_XXAA",
+    "f_cpu": "64000000L",
+    "hwids": [
+      [
+        "0x239A",
+        "0x4405"
+      ],
+      [
+        "0x239A",
+        "0x0029"
+      ],
+      [
+        "0x239A",
+        "0x002A"
+      ]
+    ],
+    "usb_product": "elecrow_solar",
+    "mcu": "nrf52840",
+    "variant": "ELECROW-ThinkNode-M6",
+    "bsp": {
+      "name": "adafruit"
+    },
+    "softdevice": {
+      "sd_flags": "-DS140",
+      "sd_name": "s140",
+      "sd_version": "6.1.1",
+      "sd_fwid": "0x00B6"
+    },
+    "bootloader": {
+      "settings_addr": "0xFF000"
+    }
+  },
+  "connectivity": [
+    "bluetooth"
+  ],
+  "debug": {
+    "jlink_device": "nRF52840_xxAA",
+    "onboard_tools": [
+      "jlink"
+    ],
+    "svd_path": "nrf52840.svd",
+    "openocd_target": "nrf52.cfg"
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "elecrow solar",
+  "upload": {
+    "maximum_ram_size": 248832,
+    "maximum_size": 815104,
+    "speed": 115200,
+    "use_1200bps_touch": true,
+    "require_upload_port": true,
+    "wait_for_upload_port": true,
+    "protocol": "nrfutil",
+    "protocols": [
+      "jlink",
+      "nrfjprog",
+      "nrfutil",
+      "stlink"
+    ]
+  },
+  "url": "https://github.com/Elecrow-RD",
+  "vendor": "ELECROW"
+}

build.sh

@@ -7,6 +7,7 @@ sh build.sh <command> [target]
 
 Commands:
   help|usage|-h|--help: Shows this message.
+  list|-l: List firmwares available to build.
   build-firmware <target>: Build the firmware for the given build target.
   build-firmwares: Build all firmwares for all targets.
   build-matching-firmwares <build-match-spec>: Build all firmwares for build targets containing the string given for <build-match-spec>.
@@ -29,22 +30,42 @@ $ sh build.sh build-repeater-firmwares
 
 Build all chat room server firmwares
 $ sh build.sh build-room-server-firmwares
+
+Environment Variables:
+  DISABLE_DEBUG=1: Disables all debug logging flags (MESH_DEBUG, MESH_PACKET_LOGGING, etc.)
+                   If not set, debug flags from variant platformio.ini files are used.
+
+Examples:
+Build without debug logging:
+$ export FIRMWARE_VERSION=v1.0.0
+$ export DISABLE_DEBUG=1
+$ sh build.sh build-firmware RAK_4631_repeater
+
+Build with debug logging (default, uses flags from variant files):
+$ export FIRMWARE_VERSION=v1.0.0
+$ sh build.sh build-firmware RAK_4631_repeater
 EOF
 }
 
+# get a list of pio env names that start with "env:"
+get_pio_envs() {
+  pio project config | grep 'env:' | sed 's/env://'
+}
+
 # Catch cries for help before doing anything else.
 case $1 in
   help|usage|-h|--help)
     global_usage
     exit 1
     ;;
+  list|-l)
+    get_pio_envs
+    exit 0
+    ;;
 esac
 
-
-# get a list of pio env names that start with "env:"
-get_pio_envs() {
-  echo $(pio project config | grep 'env:' | sed 's/env://')
-}
+# cache project config json for use in get_platform_for_env()
+PIO_CONFIG_JSON=$(pio project config --json-output)
 
 # $1 should be the string to find (case insensitive)
 get_pio_envs_containing_string() {
@@ -68,8 +89,36 @@ get_pio_envs_ending_with_string() {
   done
 }
 
+# get platform flag for a given environment
+# $1 should be the environment name
+get_platform_for_env() {
+  local env_name=$1
+  echo "$PIO_CONFIG_JSON" | python3 -c "
+import sys, json, re
+data = json.load(sys.stdin)
+for section, options in data:
+    if section == 'env:$env_name':
+        for key, value in options:
+            if key == 'build_flags':
+                for flag in value:
+                    match = re.search(r'(ESP32_PLATFORM|NRF52_PLATFORM|STM32_PLATFORM|RP2040_PLATFORM)', flag)
+                    if match:
+                        print(match.group(1))
+                        sys.exit(0)
+"
+}
+
+# disable all debug logging flags if DISABLE_DEBUG=1 is set
+disable_debug_flags() {
+  if [ "$DISABLE_DEBUG" == "1" ]; then
+    export PLATFORMIO_BUILD_FLAGS="${PLATFORMIO_BUILD_FLAGS} -UMESH_DEBUG -UBLE_DEBUG_LOGGING -UWIFI_DEBUG_LOGGING -UBRIDGE_DEBUG -UGPS_NMEA_DEBUG -UCORE_DEBUG_LEVEL -UESPNOW_DEBUG_LOGGING -UDEBUG_RP2040_WIRE -UDEBUG_RP2040_SPI -UDEBUG_RP2040_CORE -UDEBUG_RP2040_PORT -URADIOLIB_DEBUG_SPI -UCFG_DEBUG -URADIOLIB_DEBUG_BASIC -URADIOLIB_DEBUG_PROTOCOL"
+  fi
+}
+
 # build firmware for the provided pio env in $1
 build_firmware() {
+  # get env platform for post build actions
+  ENV_PLATFORM=($(get_platform_for_env $1))
 
   # get git commit sha
   COMMIT_HASH=$(git rev-parse --short HEAD)
@@ -94,30 +143,37 @@ build_firmware() {
   # add firmware version info to end of existing platformio build flags in environment vars
   export PLATFORMIO_BUILD_FLAGS="${PLATFORMIO_BUILD_FLAGS} -DFIRMWARE_BUILD_DATE='\"${FIRMWARE_BUILD_DATE}\"' -DFIRMWARE_VERSION='\"${FIRMWARE_VERSION_STRING}\"'"
 
+  # disable debug flags if requested
+  disable_debug_flags
+
   # build firmware target
   pio run -e $1
 
-  # build merge-bin for esp32 fresh install
-  if [ -f .pio/build/$1/firmware.bin ]; then
+  # build merge-bin for esp32 fresh install, copy .bins to out folder (e.g: Heltec_v3_room_server-v1.0.0-SHA.bin)
+  if [ "$ENV_PLATFORM" == "ESP32_PLATFORM" ]; then
     pio run -t mergebin -e $1
+    cp .pio/build/$1/firmware.bin out/${FIRMWARE_FILENAME}.bin 2>/dev/null || true
+    cp .pio/build/$1/firmware-merged.bin out/${FIRMWARE_FILENAME}-merged.bin 2>/dev/null || true
   fi
 
-  # build .uf2 for nrf52 boards
-  if [[ -f .pio/build/$1/firmware.zip && -f .pio/build/$1/firmware.hex ]]; then
+  # build .uf2 for nrf52 boards, copy .uf2 and .zip to out folder (e.g: RAK_4631_Repeater-v1.0.0-SHA.uf2)
+  if [ "$ENV_PLATFORM" == "NRF52_PLATFORM" ]; then
     python3 bin/uf2conv/uf2conv.py .pio/build/$1/firmware.hex -c -o .pio/build/$1/firmware.uf2 -f 0xADA52840
+    cp .pio/build/$1/firmware.uf2 out/${FIRMWARE_FILENAME}.uf2 2>/dev/null || true
+    cp .pio/build/$1/firmware.zip out/${FIRMWARE_FILENAME}.zip 2>/dev/null || true
   fi
 
-  # copy .bin, .uf2, and .zip to out folder
-  # e.g: Heltec_v3_room_server-v1.0.0-SHA.bin
-  # e.g: RAK_4631_Repeater-v1.0.0-SHA.uf2
+  # for stm32, copy .bin and .hex to out folder
+  if [ "$ENV_PLATFORM" == "STM32_PLATFORM" ]; then
+    cp .pio/build/$1/firmware.bin out/${FIRMWARE_FILENAME}.bin 2>/dev/null || true
+    cp .pio/build/$1/firmware.hex out/${FIRMWARE_FILENAME}.hex 2>/dev/null || true
+  fi
 
-  # copy .bin for esp32 boards
-  cp .pio/build/$1/firmware.bin out/${FIRMWARE_FILENAME}.bin 2>/dev/null || true
-  cp .pio/build/$1/firmware-merged.bin out/${FIRMWARE_FILENAME}-merged.bin 2>/dev/null || true
-
-  # copy .zip and .uf2 of nrf52 boards
-  cp .pio/build/$1/firmware.uf2 out/${FIRMWARE_FILENAME}.uf2 2>/dev/null || true
-  cp .pio/build/$1/firmware.zip out/${FIRMWARE_FILENAME}.zip 2>/dev/null || true
+  # for rp2040, copy .bin and .uf2 to out folder
+  if [ "$ENV_PLATFORM" == "RP2040_PLATFORM" ]; then
+    cp .pio/build/$1/firmware.bin out/${FIRMWARE_FILENAME}.bin 2>/dev/null || true
+    cp .pio/build/$1/firmware.uf2 out/${FIRMWARE_FILENAME}.uf2 2>/dev/null || true
+  fi
 
 }
 

docs/cli_commands.md

@@ -0,0 +1,881 @@
+# MeshCore Repeater & Room Server CLI Commands
+
+## Navigation
+
+- [Operational](#operational)
+- [Neighbors](#neighbors-repeater-only)
+- [Statistics](#statistics)
+- [Logging](#logging)
+- [Information](#info)
+- [Configuration](#configuration)
+  - [Radio](#radio)
+  - [System](#system)
+  - [Routing](#routing)
+  - [ACL](#acl)
+  - [Region Management](#region-management-v110)
+    - [Region Examples](#region-examples)
+  - [GPS](#gps-when-gps-support-is-compiled-in)
+  - [Sensors](#sensors-when-sensor-support-is-compiled-in)
+  - [Bridge](#bridge-when-bridge-support-is-compiled-in)
+
+---
+
+## Operational
+
+### Reboot the node
+**Usage:** 
+- `reboot`
+
+---
+
+### Reset the clock and reboot
+**Usage:**
+- `clkreboot`
+
+---
+
+### Sync the clock with the remote device
+**Usage:** 
+- `clock sync`
+
+---
+
+### Display current time in UTC
+**Usage:**
+- `clock`
+
+---
+
+### Set the time to a specific timestamp
+**Usage:** 
+- `time <epoch_seconds>`
+
+**Parameters:**
+- `epoc_seconds`: Unix epoc time
+
+---
+
+### Send a flood advert
+**Usage:** 
+- `advert`
+
+---
+
+### Start an Over-The-Air (OTA) firmware update
+**Usage:**
+- `start ota`
+
+---
+
+### Erase/Factory Reset
+**Usage:**
+- `erase`
+
+**Serial Only:** Yes
+
+**Warning:** _**This is destructive!**_
+
+---
+
+## Neighbors (Repeater Only)
+
+### List nearby neighbors
+**Usage:** 
+- `neighbors`
+
+**Note:** The output of this command is limited to the 8 most recent adverts.
+
+**Note:** Each line is encoded as `{pubkey-prefix}:{timestamp}:{snr*4}`
+
+---
+
+### Remove a neighbor
+**Usage:** 
+- `neighbor.remove <pubkey_prefix>`
+
+**Parameters:** 
+- `pubkey_prefix`: The public key of the node to remove from the neighbors list
+
+---
+
+## Statistics
+
+### Clear Stats
+**Usage:** `clear stats`
+
+---
+
+### System Stats - Battery, Uptime, Queue Length and Debug Flags
+**Usage:** 
+- `stats-core`
+
+**Serial Only:** Yes
+
+---
+
+### Radio Stats - Noise floor, Last RSSI/SNR, Airtime, Receive errors
+**Usage:** `stats-radio`
+
+**Serial Only:** Yes
+
+---
+
+### Packet stats - Packet counters: Received, Sent
+**Usage:** `stats-packets`
+
+**Serial Only:** Yes
+
+---
+
+## Logging
+
+### Begin capture of rx log to node storage
+**Usage:** `log start`
+
+---
+
+### End capture of rx log to node sotrage
+**Usage:** `log stop`
+
+---
+
+### Erase captured log
+**Usage:** `log erase`
+
+---
+
+### Print the captured log to the serial terminal
+**Usage:** `log`
+
+**Serial Only:** Yes
+
+---
+
+## Info
+
+### Get the Version
+**Usage:** `ver`
+
+---
+
+### Show the hardware name
+**Usage:** `board`
+
+---
+
+## Configuration
+
+### Radio
+
+#### View or change this node's radio parameters
+**Usage:**
+- `get radio`
+- `set radio <freq>,<bw>,<sf>,<cr>`
+
+**Parameters:**
+- `freq`: Frequency in MHz
+- `bw`: Bandwidth in kHz
+- `sf`: Spreading factor (5-12)
+- `cr`: Coding rate (5-8)
+
+**Set by build flag:** `LORA_FREQ`, `LORA_BW`, `LORA_SF`, `LORA_CR`
+
+**Default:** `869.525,250,11,5`
+
+**Note:** Requires reboot to apply
+
+---
+
+#### View or change this node's transmit power
+**Usage:**
+- `get tx`
+- `set tx <dbm>`
+
+**Parameters:**
+- `dbm`: Power level in dBm (1-22)
+
+**Set by build flag:** `LORA_TX_POWER`
+
+**Default:** Varies by board
+
+**Notes:** This setting only controls the power level of the LoRa chip. Some nodes have an additional power amplifier stage which increases the total output. Referr to the node's manual for the correct setting to use. **Setting a value too high may violate the laws in your country.**
+
+---
+
+#### Change the radio parameters for a set duration
+**Usage:** 
+- `tempradio <freq>,<bw>,<sf>,<cr>,<timeout_mins>`
+
+**Parameters:**
+- `freq`: Frequency in MHz (300-2500)
+- `bw`: Bandwidth in kHz (7.8-500)
+- `sf`: Spreading factor (5-12)
+- `cr`: Coding rate (5-8)
+- `timeout_mins`: Duration in minutes (must be > 0)
+
+**Note:** This is not saved to preferences and will clear on reboot
+
+---
+
+#### View or change this node's frequency
+**Usage:**
+- `get freq`
+- `set freq <frequency>`
+
+**Parameters:**
+- `frequency`: Frequency in MHz
+
+**Default:** `869.525`
+
+**Note:** Requires reboot to apply
+
+### System
+
+#### View or change this node's name
+**Usage:**
+- `get name`
+- `set name <name>`
+
+**Parameters:**
+- `name`: Node name
+
+**Set by build flag:** `ADVERT_NAME`
+
+**Default:** Varies by board
+
+**Note:** Max length varies. If a location is set, the max length is 24 bytes; 32 otherwise. Emoji and unicode characters may take more than one byte.
+
+---
+
+#### View or change this node's latitude
+**Usage:**
+- `get lat`
+- `set lat <degrees>`
+
+**Set by build flag:** `ADVERT_LAT`
+
+**Default:** `0`
+
+**Parameters:**
+- `degrees`: Latitude in degrees
+
+---
+
+#### View or change this node's longitude
+**Usage:**
+- `get lon`
+- `set lon <degrees>`
+
+**Set by build flag:** `ADVERT_LON`
+
+**Default:** `0`
+
+**Parameters:**
+- `degrees`: Longitude in degrees
+
+---
+
+#### View or change this node's identity (Private Key)
+**Usage:**
+- `get prv.key`
+- `set prv.key <private_key>`
+
+**Parameters:**
+- `private_key`: Private key in hex format (64 hex characters)
+
+**Serial Only:**
+- `get prv.key`: Yes
+- `set prv.key`: No
+
+**Note:** Requires reboot to take effect after setting
+
+---
+
+#### View or change this node's admin password
+**Usage:**
+- `get password`
+- `set password <password>`
+
+**Parameters:**
+- `password`: Admin password
+
+**Set by build flag:** `ADMIN_PASSWORD`
+
+**Default:** `password`
+
+**Note:** Echoed back for confirmation
+
+**Note:** Any node using this password will be added to the admin ACL list.
+
+---
+
+#### View or change this node's guest password
+**Usage:**
+- `get guest.password`
+- `set guest.password <password>`
+
+**Parameters:**
+- `password`: Guest password
+
+**Set by build flag:** `ROOM_PASSWORD` (Room Server only)
+
+**Default:** `<blank>`
+
+---
+
+#### View or change this node's owner info
+**Usage:**
+- `get owner.info`
+- `set owner.info <text>`
+
+**Parameters:**
+- `text`: Owner information text
+
+**Default:** `<blank>`
+
+**Note:** `|` characters are translated to newlines
+
+**Note:** Requires firmware 1.12.+
+
+---
+
+#### Fine-tune the battery reading
+**Usage:**
+- `get adc.multiplier`
+- `set adc.multiplier <value>`
+
+**Parameters:**
+- `value`: ADC multiplier (0.0-10.0)
+
+**Default:** `0.0` (value defined by board)
+
+**Note:** Returns "Error: unsupported by this board" if hardware doesn't support it
+
+---
+
+#### View or change this node's power saving flag (Repeater Only)
+**Usage:**
+- `powersaving <state>`
+- `powersaving`
+
+**Parameters:** 
+- `state`: `on`|`off` 
+
+**Default:** `on`
+
+**Note:** When enabled, device enters sleep mode between radio transmissions
+
+---
+
+### Routing
+
+#### View or change this node's repeat flag
+**Usage:**
+- `get repeat`
+- `set repeat <state>`
+
+**Parameters:**
+  - `state`: `on`|`off`
+
+**Default:** `on`
+
+---
+
+#### View or change the retransmit delay factor for flood traffic
+**Usage:**
+- `get txdelay`
+- `set txdelay <value>`
+
+**Parameters:**
+- `value`: Transmit delay factor (0-2)
+
+**Default:** `0.5`
+
+---
+
+#### View or change the retransmit delay factor for direct traffic
+**Usage:**
+- `get direct.txdelay`
+- `set direct.txdelay <value>`
+
+**Parameters:**
+- `value`: Direct transmit delay factor (0-2)
+
+**Default:** `0.2`
+
+---
+
+#### [Experimental] View or change the processing delay for received traffic
+**Usage:**
+- `get rxdelay`
+- `set rxdelay <value>`
+
+**Parameters:**
+- `value`: Receive delay base (0-20)
+
+**Default:** `0.0`
+
+---
+
+#### View or change the airtime factor (duty cycle limit)
+**Usage:**
+- `get af`
+- `set af <value>`
+
+**Parameters:**
+- `value`: Airtime factor (0-9)
+
+**Default:** `1.0`
+
+---
+
+#### View or change the local interference threshold
+**Usage:**
+- `get int.thresh`
+- `set int.thresh <value>`
+
+**Parameters:**
+- `value`: Interference threshold value
+
+**Default:** `0.0`
+
+---
+
+#### View or change the AGC Reset Interval
+**Usage:**
+- `get agc.reset.interval`
+- `set agc.reset.interval <value>`
+
+**Parameters:**
+- `value`: Interval in seconds rounded down to a multiple of 4 (17 becomes 16)
+
+**Default:** `0.0`
+
+---
+
+#### Enable or disable Multi-Acks support
+**Usage:**
+- `get multi.acks`
+- `set multi.acks <state>`
+
+**Parameters:**
+- `state`: `0` (disable) or `1` (enable)
+
+**Default:** `0`
+
+---
+
+#### View or change the flood advert interval
+**Usage:**
+- `get flood.advert.interval`
+- `set flood.advert.interval <hours>`
+
+**Parameters:**
+- `hours`: Interval in hours (3-168)
+
+**Default:** `12` (Repeater) - `0` (Sensor)
+
+---
+
+#### View or change the zero-hop advert interval
+**Usage:**
+- `get advert.interval`
+- `set advert.interval <minutes>`
+
+**Parameters:**
+- `minutes`: Interval in minutes rounded down to the nearest multiple of 2 (61 becomes 60) (60-240)
+
+**Default:** `0`
+
+---
+
+#### Limit the number of hops for a flood message
+**Usage:**
+- `get flood.max`
+- `set flood.max <value>`
+
+**Parameters:**
+- `value`: Maximum flood hop count (0-64)
+
+**Default:** `64`
+
+---
+
+### ACL
+
+#### Add, update or remove permissions for a companion
+**Usage:** 
+- `setperm <pubkey> <permissions>`
+
+**Parameters:**
+- `pubkey`: Companion public key
+- `permissions`: 
+  - `0`: Guest
+  - `1`: Read-only
+  - `2`: Read-write
+  - `3`: Admin
+
+**Note:** Removes the entry when `permissions` is omitted
+
+---
+
+#### View the current ACL
+**Usage:** 
+- `get acl`
+
+**Serial Only:** Yes
+
+---
+
+#### View or change this room server's 'read-only' flag
+**Usage:**
+- `get allow.read.only`
+- `set allow.read.only <state>`
+
+**Parameters:**
+- `state`: `on` (enable) or `off` (disable)
+
+**Default:** `off`
+
+---
+
+### Region Management (v1.10.+)
+
+#### Bulk-load region lists
+**Usage:** 
+- `region load`
+- `region load <name> [flood_flag]`
+
+**Parameters:**
+- `name`: A name of a region. `*` represents the wildcard region
+
+**Note:** `flood_flag`: Optional `F` to allow flooding
+
+**Note:** Indentation creates parent-child relationships (max 8 levels)
+
+**Note:** `region load` with an empty name will not work remotely (it's interactive)
+
+---
+
+#### Save any changes to regions made since reboot
+**Usage:** 
+- `region save`
+
+---
+
+#### Allow a region
+**Usage:** 
+- `region allowf <name>`
+
+**Parameters:** 
+- `name`: Region name (or `*` for wildcard)
+
+**Note:** Setting on wildcard `*` allows packets without region transport codes
+
+---
+
+#### Block a region
+**Usage:** 
+- `region denyf <name>`
+
+**Parameters:** 
+- `name`: Region name (or `*` for wildcard)
+
+**Note:** Setting on wildcard `*` drops packets without region transport codes
+
+---
+
+#### Show information for a region
+**Usage:** 
+- `region get <name>`
+
+**Parameters:**
+- `name`: Region name (or `*` for wildcard)
+
+---
+
+#### View or change the home region for this node
+**Usage:** 
+- `region home`
+- `region home <name>`
+
+**Parameters:**
+- `name`: Region name
+
+---
+
+#### Create a new region
+**Usage:** 
+- `region put <name> [parent_name]`
+
+**Parameters:**
+- `name`: Region name
+- `parent_name`: Parent region name (optional, defaults to wildcard)
+
+---
+
+#### Remove a region
+**Usage:** 
+- `region remove <name>`
+
+**Parameters:**
+- `name`: Region name
+
+**Note:** Must remove all child regions before the region can be removed 
+
+---
+
+#### View all regions
+**Usage:** 
+- `region list <filter>`
+
+**Serial Only:** Yes
+
+**Parameters:**
+- `filter`: `allowed`|`denied`
+
+**Note:** Requires firmware 1.12.+
+
+---
+
+#### Dump all defined regions and flood permissions
+**Usage:** 
+- `region`
+
+**Serial Only:** For firmware older than 1.12.0
+
+---
+
+### Region Examples
+
+**Example 1: Using F Flag with Named Public Region**
+```
+region load
+#Europe F
+<blank line to end region load>
+region save
+```
+
+**Explanation:**
+- Creates a region named `#Europe` with flooding enabled
+- Packets from this region will be flooded to other nodes
+
+---
+
+**Example 2: Using Wildcard with F Flag**
+```
+region load 
+* F
+<blank line to end region load>
+region save
+```
+
+**Explanation:**
+- Creates a wildcard region `*` with flooding enabled
+- Enables flooding for all regions automatically
+- Applies only to packets without transport codes
+
+---
+
+**Example 3: Using Wildcard Without F Flag**
+```
+region load 
+*
+<blank line to end region load>
+region save
+```
+**Explanation:**
+- Creates a wildcard region `*` without flooding
+- This region exists but doesn't affect packet distribution
+- Used as a default/empty region
+
+---
+
+**Example 4: Nested Public Region with F Flag**
+```
+region load 
+#Europe F
+  #UK
+    #London
+    #Manchester
+  #France
+    #Paris
+    #Lyon
+<blank line to end region load>
+region save
+```
+
+**Explanation:**
+- Creates `#Europe` region with flooding enabled
+- Adds nested child regions (`#UK`, `#France`)
+- All nested regions inherit the flooding flag from parent
+
+---
+
+**Example 5: Wildcard with Nested Public Regions**
+```
+region load 
+* F
+  #NorthAmerica
+    #USA
+      #NewYork
+      #California
+    #Canada
+      #Ontario
+      #Quebec
+<blank line to end region load>
+region save
+```
+
+**Explanation:**
+- Creates wildcard region `*` with flooding enabled
+- Adds nested `#NorthAmerica` hierarchy
+- Enables flooding for all child regions automatically
+- Useful for global networks with specific regional rules
+
+---
+### GPS (When GPS support is compiled in)
+
+#### View or change GPS state
+**Usage:**
+- `gps`
+- `gps <state>`
+
+**Parameters:**
+- `state`: `on`|`off`
+
+**Default:** `off`
+
+**Note:** Output format: `{status}, {fix}, {sat count}` (when enabled)
+
+---
+
+#### Sync this node's clock with GPS time
+**Usage:** 
+- `gps sync`
+
+---
+
+#### Set this node's location based on the GPS coordinates
+**Usage:** 
+- `gps setloc`
+
+---
+
+#### View or change the GPS advert policy
+**Usage:**
+- `gps advert`
+- `gps advert <policy>`
+
+**Parameters:** 
+- `policy`: `none`|`shared`|`prefs` 
+  - `none`: don't include location in adverts
+  - `share`: share gps location (from SensorManager)
+  - `prefs`: location stored in node's lat and lon settings
+
+**Default:** `prefs`
+
+---
+
+### Sensors (When sensor support is compiled in)
+
+#### View the list of sensors on this node
+**Usage:** `sensor list [start]`
+
+**Parameters:**
+- `start`: Optional starting index (defaults to 0)
+
+**Note:** Output format: `<var_name>=<value>\n`
+
+---
+
+#### View or change thevalue of a sensor
+**Usage:** 
+- `sensor get <key>`
+- `sensor set <key> <value>`
+
+**Parameters:**
+- `key`: Sensor setting name
+- `value`: The value to set the sensor to
+
+---
+
+### Bridge (When bridge support is compiled in)
+
+#### View or change the bridge enabled flag
+**Usage:**
+- `get bridge.enabled`
+- `set bridge.enabled <state>`
+
+**Parameters:**
+- `state`: `on`|`off`
+
+**Default:** `off`
+
+---
+
+#### View the bridge source
+**Usage:**
+- `get bridge.source`
+
+---
+
+#### Add a delay to packets routed through this bridge
+**Usage:**
+- `get bridge.delay`
+- `set bridge.delay <ms>`
+
+**Parameters:**
+- `ms`: Delay in milliseconds (0-10000)
+
+**Default:** `500`
+
+---
+
+#### View or change the source of packets bridged to the external interface
+**Usage:**
+- `get bridge.source`
+- `set bridge.source <source>`
+
+**Parameters:**
+- `source`: 
+  - `rx`: bridges received packets
+  - `tx`: bridges transmitted packets
+
+**Default:** `tx`
+
+---
+
+#### View or change the speed of the bridge (RS-232 only)
+**Usage:**
+- `get bridge.baud`
+- `set bridge.baud <rate>`
+
+**Parameters:**
+- `rate`: Baud rate (`9600`, `19200`, `38400`, `57600`, or `115200`)
+
+**Default:** `115200`
+
+---
+
+#### View or change the channel used for bridging (ESPNow only)
+**Usage:**
+- `get bridge.channel`
+- `set bridge.channel <channel>`
+
+**Parameters:**
+- `channel`: Channel number (1-14)
+
+---
+
+#### Set the ESP-Now secret
+**Usage:** 
+- `get bridge.secret`
+- `set bridge.secret <secret>`
+
+**Parameters:**
+- `secret`: 16-character encryption secret
+
+**Default:** Varies by board
+
+---

docs/kiss_modem_protocol.md

@@ -0,0 +1,282 @@
+# MeshCore KISS Modem Protocol
+
+Standard KISS TNC firmware for MeshCore LoRa radios. Compatible with any KISS client (Direwolf, APRSdroid, YAAC, etc.) for sending and receiving raw packets. MeshCore-specific extensions (cryptography, radio configuration, telemetry) are available through the standard SetHardware (0x06) command.
+
+## Serial Configuration
+
+115200 baud, 8N1, no flow control.
+
+## Frame Format
+
+Standard KISS framing per the KA9Q/K3MC specification.
+
+| Byte | Name | Description |
+|------|------|-------------|
+| `0xC0` | FEND | Frame delimiter |
+| `0xDB` | FESC | Escape character |
+| `0xDC` | TFEND | Escaped FEND (FESC + TFEND = 0xC0) |
+| `0xDD` | TFESC | Escaped FESC (FESC + TFESC = 0xDB) |
+
+```
+┌──────┬───────────┬──────────────┬──────┐
+│ FEND │ Type Byte │ Data (escaped)│ FEND │
+│ 0xC0 │  1 byte   │ 0-510 bytes  │ 0xC0 │
+└──────┴───────────┴──────────────┴──────┘
+```
+
+### Type Byte
+
+The type byte is split into two nibbles:
+
+| Bits | Field | Description |
+|------|-------|-------------|
+| 7-4 | Port | Port number (0 for single-port TNC) |
+| 3-0 | Command | Command number |
+
+Maximum unescaped frame size: 512 bytes.
+
+## Standard KISS Commands
+
+### Host to TNC
+
+| Command | Value | Data | Description |
+|---------|-------|------|-------------|
+| Data | `0x00` | Raw packet | Queue packet for transmission |
+| TXDELAY | `0x01` | Delay (1 byte) | Transmitter keyup delay in 10ms units (default: 50 = 500ms) |
+| Persistence | `0x02` | P (1 byte) | CSMA persistence parameter 0-255 (default: 63) |
+| SlotTime | `0x03` | Interval (1 byte) | CSMA slot interval in 10ms units (default: 10 = 100ms) |
+| TXtail | `0x04` | Delay (1 byte) | Post-TX hold time in 10ms units (default: 0) |
+| FullDuplex | `0x05` | Mode (1 byte) | 0 = half duplex, nonzero = full duplex (default: 0) |
+| SetHardware | `0x06` | Sub-command + data | MeshCore extensions (see below) |
+| Return | `0xFF` | - | Exit KISS mode (no-op) |
+
+### TNC to Host
+
+| Type | Value | Data | Description |
+|------|-------|------|-------------|
+| Data | `0x00` | Raw packet | Received packet from radio |
+
+Data frames carry raw packet data only, with no metadata prepended. The Data command payload is limited to 255 bytes to match the MeshCore maximum transmission unit (MAX_TRANS_UNIT); frames larger than 255 bytes are silently dropped. The KISS specification recommends at least 1024 bytes for general-purpose TNCs; this modem is intended for MeshCore packets only, whose protocol MTU is 255 bytes.
+
+### CSMA Behavior
+
+The TNC implements p-persistent CSMA for half-duplex operation:
+
+1. When a packet is queued, monitor carrier detect
+2. When the channel clears, generate a random value 0-255
+3. If the value is less than or equal to P (Persistence), wait TXDELAY then transmit
+4. Otherwise, wait SlotTime and repeat from step 1
+
+In full-duplex mode, CSMA is bypassed and packets transmit after TXDELAY.
+
+## SetHardware Extensions (0x06)
+
+MeshCore-specific functionality uses the standard KISS SetHardware command. The first byte of SetHardware data is a sub-command. Standard KISS clients ignore these frames.
+
+### Frame Format
+
+```
+┌──────┬──────┬─────────────┬──────────────┬──────┐
+│ FEND │ 0x06 │ Sub-command  │ Data (escaped)│ FEND │
+│ 0xC0 │      │   1 byte    │   variable   │ 0xC0 │
+└──────┴──────┴─────────────┴──────────────┴──────┘
+```
+
+### Request Sub-commands (Host to TNC)
+
+| Sub-command | Value | Data |
+|-------------|-------|------|
+| GetIdentity | `0x01` | - |
+| GetRandom | `0x02` | Length (1 byte, 1-64) |
+| VerifySignature | `0x03` | PubKey (32) + Signature (64) + Data |
+| SignData | `0x04` | Data to sign |
+| EncryptData | `0x05` | Key (32) + Plaintext |
+| DecryptData | `0x06` | Key (32) + MAC (2) + Ciphertext |
+| KeyExchange | `0x07` | Remote PubKey (32) |
+| Hash | `0x08` | Data to hash |
+| SetRadio | `0x09` | Freq (4) + BW (4) + SF (1) + CR (1) |
+| SetTxPower | `0x0A` | Power dBm (1) |
+| GetRadio | `0x0B` | - |
+| GetTxPower | `0x0C` | - |
+| GetCurrentRssi | `0x0D` | - |
+| IsChannelBusy | `0x0E` | - |
+| GetAirtime | `0x0F` | Packet length (1) |
+| GetNoiseFloor | `0x10` | - |
+| GetVersion | `0x11` | - |
+| GetStats | `0x12` | - |
+| GetBattery | `0x13` | - |
+| GetMCUTemp | `0x14` | - |
+| GetSensors | `0x15` | Permissions (1) |
+| GetDeviceName | `0x16` | - |
+| Ping | `0x17` | - |
+| Reboot | `0x18` | - |
+| SetSignalReport | `0x19` | Enable (1): 0x00=disable, nonzero=enable |
+| GetSignalReport | `0x1A` | - |
+
+### Response Sub-commands (TNC to Host)
+
+Response codes use the high-bit convention: `response = command | 0x80`. Generic and unsolicited responses use the `0xF0`+ range.
+
+| Sub-command | Value | Data |
+|-------------|-------|------|
+| Identity | `0x81` | PubKey (32) |
+| Random | `0x82` | Random bytes (1-64) |
+| Verify | `0x83` | Result (1): 0x00=invalid, 0x01=valid |
+| Signature | `0x84` | Signature (64) |
+| Encrypted | `0x85` | MAC (2) + Ciphertext |
+| Decrypted | `0x86` | Plaintext |
+| SharedSecret | `0x87` | Shared secret (32) |
+| Hash | `0x88` | SHA-256 hash (32) |
+| Radio | `0x8B` | Freq (4) + BW (4) + SF (1) + CR (1) |
+| TxPower | `0x8C` | Power dBm (1) |
+| CurrentRssi | `0x8D` | RSSI dBm (1, signed) |
+| ChannelBusy | `0x8E` | Result (1): 0x00=clear, 0x01=busy |
+| Airtime | `0x8F` | Milliseconds (4) |
+| NoiseFloor | `0x90` | dBm (2, signed) |
+| Version | `0x91` | Version (1) + Reserved (1) |
+| Stats | `0x92` | RX (4) + TX (4) + Errors (4) |
+| Battery | `0x93` | Millivolts (2) |
+| MCUTemp | `0x94` | Temperature (2, signed) |
+| Sensors | `0x95` | CayenneLPP payload |
+| DeviceName | `0x96` | Name (variable, UTF-8) |
+| Pong | `0x97` | - |
+| SignalReport | `0x9A` | Status (1): 0x00=disabled, 0x01=enabled |
+| OK | `0xF0` | - |
+| Error | `0xF1` | Error code (1) |
+| TxDone | `0xF8` | Result (1): 0x00=failed, 0x01=success |
+| RxMeta | `0xF9` | SNR (1) + RSSI (1) |
+
+### Error Codes
+
+| Code | Value | Description |
+|------|-------|-------------|
+| InvalidLength | `0x01` | Request data too short |
+| InvalidParam | `0x02` | Invalid parameter value |
+| NoCallback | `0x03` | Feature not available |
+| MacFailed | `0x04` | MAC verification failed |
+| UnknownCmd | `0x05` | Unknown sub-command |
+| EncryptFailed | `0x06` | Encryption failed |
+
+### Unsolicited Events
+
+The TNC sends these SetHardware frames without a preceding request:
+
+**TxDone (0xF8)**: Sent after a packet has been transmitted. Contains a single byte: 0x01 for success, 0x00 for failure.
+
+**RxMeta (0xF9)**: Sent immediately after each standard data frame (type 0x00) with metadata for the received packet. Contains SNR (1 byte, signed, value x4 for 0.25 dB precision) followed by RSSI (1 byte, signed, dBm). Enabled by default; can be toggled with SetSignalReport. Standard KISS clients ignore this frame.
+
+## Data Formats
+
+### Radio Parameters (SetRadio / Radio response)
+
+All values little-endian.
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Frequency | 4 bytes | Hz (e.g., 869618000) |
+| Bandwidth | 4 bytes | Hz (e.g., 62500) |
+| SF | 1 byte | Spreading factor (5-12) |
+| CR | 1 byte | Coding rate (5-8) |
+
+### Version (Version response)
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Version | 1 byte | Firmware version |
+| Reserved | 1 byte | Always 0 |
+
+### Encrypted (Encrypted response)
+
+| Field | Size | Description |
+|-------|------|-------------|
+| MAC | 2 bytes | HMAC-SHA256 truncated to 2 bytes |
+| Ciphertext | variable | AES-128-CBC encrypted data |
+
+### Airtime (Airtime response)
+
+All values little-endian.
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Airtime | 4 bytes | uint32_t, estimated air time in milliseconds |
+
+### Noise Floor (NoiseFloor response)
+
+All values little-endian.
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Noise floor | 2 bytes | int16_t, dBm (signed) |
+
+The modem recalibrates the noise floor every 2 seconds with an AGC reset every 30 seconds.
+
+### Stats (Stats response)
+
+All values little-endian.
+
+| Field | Size | Description |
+|-------|------|-------------|
+| RX | 4 bytes | Packets received |
+| TX | 4 bytes | Packets transmitted |
+| Errors | 4 bytes | Receive errors |
+
+### Battery (Battery response)
+
+All values little-endian.
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Millivolts | 2 bytes | uint16_t, battery voltage in mV |
+
+### MCU Temperature (MCUTemp response)
+
+All values little-endian.
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Temperature | 2 bytes | int16_t, tenths of °C (e.g., 253 = 25.3°C) |
+
+Returns `NoCallback` error if the board does not support temperature readings.
+
+### Device Name (DeviceName response)
+
+| Field | Size | Description |
+|-------|------|-------------|
+| Name | variable | UTF-8 string, no null terminator |
+
+### Reboot
+
+Sends an `OK` response, flushes serial, then reboots the device. The host should expect the connection to drop.
+
+### Sensor Permissions (GetSensors)
+
+| Bit | Value | Description |
+|-----|-------|-------------|
+| 0 | `0x01` | Base (battery) |
+| 1 | `0x02` | Location (GPS) |
+| 2 | `0x04` | Environment (temp, humidity, pressure) |
+
+Use `0x07` for all permissions.
+
+### Sensor Data (Sensors response)
+
+Data returned in CayenneLPP format. See [CayenneLPP documentation](https://docs.mydevices.com/docs/lorawan/cayenne-lpp) for parsing.
+
+## Cryptographic Algorithms
+
+| Operation | Algorithm |
+|-----------|-----------|
+| Identity / Signing / Verification | Ed25519 |
+| Key Exchange | X25519 (ECDH) |
+| Encryption | AES-128-CBC + HMAC-SHA256 (MAC truncated to 2 bytes) |
+| Hashing | SHA-256 |
+
+## Notes
+
+- Data payload limit (255 bytes) matches MeshCore MAX_TRANS_UNIT; no change needed for KISS “1024+ recommended” (that applies to general TNCs, not MeshCore)
+- Modem generates identity on first boot (stored in flash)
+- All multi-byte values are little-endian unless stated otherwise
+- SNR values in RxMeta are multiplied by 4 for 0.25 dB precision
+- TxDone is sent as a SetHardware event after each transmission
+- Standard KISS clients receive only type 0x00 data frames and can safely ignore all SetHardware (0x06) frames
+- See [packet_structure.md](./packet_structure.md) for packet format

docs/nrf52_power_management.md

@@ -0,0 +1,213 @@
+# nRF52 Power Management
+
+## Overview
+
+The nRF52 Power Management module provides battery protection features to prevent over-discharge, minimise likelihood of brownout and flash corruption conditions existing, and enable safe voltage-based recovery.
+
+## Features
+
+### Boot Voltage Protection
+- Checks battery voltage immediately after boot and before mesh operations commence
+- If voltage is below a configurable threshold (e.g., 3300mV), the device configures voltage wake (LPCOMP + VBUS) and enters protective shutdown (SYSTEMOFF)
+- Prevents boot loops when battery is critically low
+- Skipped when external power (USB VBUS) is detected
+
+### Voltage Wake (LPCOMP + VBUS)
+- Configures the nRF52's Low Power Comparator (LPCOMP) before entering SYSTEMOFF
+- Enables USB VBUS detection so external power can wake the device
+- Device automatically wakes when battery voltage rises above recovery threshold or when VBUS is detected
+
+### Early Boot Register Capture
+- Captures RESETREAS (reset reason) and GPREGRET2 (shutdown reason) before SystemInit() clears them
+- Allows firmware to determine why it booted (cold boot, watchdog, LPCOMP wake, etc.)
+- Allows firmware to determine why it last shut down (user request, low voltage, boot protection)
+
+### Shutdown Reason Tracking
+Shutdown reason codes (stored in GPREGRET2):
+| Code | Name | Description |
+|------|------|-------------|
+| 0x00 | NONE | Normal boot / no previous shutdown |
+| 0x4C | LOW_VOLTAGE | Runtime low voltage threshold reached |
+| 0x55 | USER | User requested powerOff() |
+| 0x42 | BOOT_PROTECT | Boot voltage protection triggered |
+
+## Supported Boards
+
+| Board | Implemented | LPCOMP wake | VBUS wake |
+|-------|-------------|-------------|-----------|
+| Seeed Studio XIAO nRF52840 (`xiao_nrf52`) | Yes | Yes | Yes |
+| RAK4631 (`rak4631`) | Yes | Yes | Yes |
+| Heltec T114 (`heltec_t114`) | Yes | Yes | Yes |
+| Promicro nRF52840 | No | No | No |
+| RAK WisMesh Tag | No | No | No |
+| Heltec Mesh Solar | No | No | No |
+| LilyGo T-Echo / T-Echo Lite | No | No | No |
+| SenseCAP Solar | No | No | No |
+| WIO Tracker L1 / L1 E-Ink | No | No | No |
+| WIO WM1110 | No | No | No |
+| Mesh Pocket | No | No | No |
+| Nano G2 Ultra | No | No | No |
+| ThinkNode M1/M3/M6 | No | No | No |
+| T1000-E | No | No | No |
+| Ikoka Nano/Stick/Handheld (nRF) | No | No | No |
+| Keepteen LT1 | No | No | No |
+| Minewsemi ME25LS01 | No | No | No |
+
+Notes:
+- "Implemented" reflects Phase 1 (boot lockout + shutdown reason capture).
+- User power-off on Heltec T114 does not enable LPCOMP wake.
+- VBUS detection is used to skip boot lockout on external power, and VBUS wake is configured alongside LPCOMP when supported hardware exposes VBUS to the nRF52.
+
+## Technical Details
+
+### Architecture
+
+The power management functionality is integrated into the `NRF52Board` base class in `src/helpers/NRF52Board.cpp`. Board variants provide hardware-specific configuration via a `PowerMgtConfig` struct and override `initiateShutdown(uint8_t reason)` to perform board-specific power-down work and conditionally enable voltage wake (LPCOMP + VBUS).
+
+### Early Boot Capture
+
+A static constructor with priority 101 in `NRF52Board.cpp` captures the RESETREAS and GPREGRET2 registers before:
+- SystemInit() (priority 102) - which clears RESETREAS
+- Static C++ constructors (default priority 65535)
+
+This ensures we capture the true reset reason before any initialisation code runs.
+
+### Board Implementation
+
+To enable power management on a board variant:
+
+1. **Enable in platformio.ini**:
+   ```ini
+   -D NRF52_POWER_MANAGEMENT
+   ```
+
+2. **Define configuration in variant.h**:
+   ```c
+   #define PWRMGT_VOLTAGE_BOOTLOCK    3300   // Won't boot below this voltage (mV)
+   #define PWRMGT_LPCOMP_AIN          7      // AIN channel for voltage sensing
+   #define PWRMGT_LPCOMP_REFSEL       2      // REFSEL (0-6=1/8..7/8, 7=ARef, 8-15=1/16..15/16)
+   ```
+
+3. **Implement in board .cpp file**:
+   ```cpp
+   #ifdef NRF52_POWER_MANAGEMENT
+   const PowerMgtConfig power_config = {
+     .lpcomp_ain_channel = PWRMGT_LPCOMP_AIN,
+     .lpcomp_refsel = PWRMGT_LPCOMP_REFSEL,
+     .voltage_bootlock = PWRMGT_VOLTAGE_BOOTLOCK
+   };
+
+   void MyBoard::initiateShutdown(uint8_t reason) {
+     // Board-specific shutdown preparation (e.g., disable peripherals)
+     bool enable_lpcomp = (reason == SHUTDOWN_REASON_LOW_VOLTAGE ||
+                           reason == SHUTDOWN_REASON_BOOT_PROTECT);
+
+     if (enable_lpcomp) {
+       configureVoltageWake(power_config.lpcomp_ain_channel, power_config.lpcomp_refsel);
+     }
+
+     enterSystemOff(reason);
+   }
+   #endif
+
+   void MyBoard::begin() {
+     NRF52Board::begin();  // or NRF52BoardDCDC::begin()
+     // ... board setup ...
+
+   #ifdef NRF52_POWER_MANAGEMENT
+     checkBootVoltage(&power_config);
+   #endif
+   }
+   ```
+
+   For user-initiated shutdowns, `powerOff()` remains board-specific. Power management only arms LPCOMP for automated shutdown reasons (boot protection/low voltage).
+
+4. **Declare override in board .h file**:
+   ```cpp
+   #ifdef NRF52_POWER_MANAGEMENT
+     void initiateShutdown(uint8_t reason) override;
+   #endif
+   ```
+
+### Voltage Wake Configuration
+
+The LPCOMP (Low Power Comparator) is configured to:
+- Monitor the specified AIN channel (0-7 corresponding to P0.02-P0.05, P0.28-P0.31)
+- Compare against VDD fraction reference (REFSEL: 0-6=1/8..7/8, 7=ARef, 8-15=1/16..15/16)
+- Detect UP events (voltage rising above threshold)
+- Use 50mV hysteresis for noise immunity
+- Wake the device from SYSTEMOFF when triggered
+
+VBUS wake is enabled via the POWER peripheral USBDETECTED event whenever `configureVoltageWake()` is used. This requires USB VBUS to be routed to the nRF52 (typical on nRF52840 boards with native USB).
+
+**LPCOMP Reference Selection (PWRMGT_LPCOMP_REFSEL)**:
+| REFSEL | Fraction | VBAT @ 1M/1M divider (VDD=3.0-3.3) | VBAT @ 1.5M/1M divider (VDD=3.0-3.3) |
+|--------|----------|------------------------------------|--------------------------------------|
+| 0 | 1/8 | 0.75-0.82 V | 0.94-1.03 V |
+| 1 | 2/8 | 1.50-1.65 V | 1.88-2.06 V |
+| 2 | 3/8 | 2.25-2.47 V | 2.81-3.09 V |
+| 3 | 4/8 | 3.00-3.30 V | 3.75-4.12 V |
+| 4 | 5/8 | 3.75-4.12 V | 4.69-5.16 V |
+| 5 | 6/8 | 4.50-4.95 V | 5.62-6.19 V |
+| 6 | 7/8 | 5.25-5.77 V | 6.56-7.22 V |
+| 7 | ARef | - | - |
+| 8 | 1/16 | 0.38-0.41 V | 0.47-0.52 V |
+| 9 | 3/16 | 1.12-1.24 V | 1.41-1.55 V |
+| 10 | 5/16 | 1.88-2.06 V | 2.34-2.58 V |
+| 11 | 7/16 | 2.62-2.89 V | 3.28-3.61 V |
+| 12 | 9/16 | 3.38-3.71 V | 4.22-4.64 V |
+| 13 | 11/16 | 4.12-4.54 V | 5.16-5.67 V |
+| 14 | 13/16 | 4.88-5.36 V | 6.09-6.70 V |
+| 15 | 15/16 | 5.62-6.19 V | 7.03-7.73 V |
+
+**Important**: For boards with a voltage divider on the battery sense pin, LPCOMP measures the divided voltage. Use:
+`VBAT_threshold ≈ (VDD * fraction) * divider_scale`, where `divider_scale = (Rtop + Rbottom) / Rbottom` (e.g., 2.0 for 1M/1M, 2.5 for 1.5M/1M, 3.0 for XIAO).
+
+### SoftDevice Compatibility
+
+The power management code checks whether SoftDevice is enabled and uses the appropriate API:
+- When SD enabled: `sd_power_*` functions
+- When SD disabled: Direct register access (NRF_POWER->*)
+
+This ensures compatibility regardless of BLE stack state.
+
+## CLI Commands
+
+Power management status can be queried via the CLI:
+
+| Command | Description |
+|---------|-------------|
+| `get pwrmgt.support` | Returns "supported" or "unsupported" |
+| `get pwrmgt.source` | Returns current power source - "battery" or "external" (5V/USB power) |
+| `get pwrmgt.bootreason` | Returns reset and shutdown reason strings |
+| `get pwrmgt.bootmv` | Returns boot voltage in millivolts |
+
+On boards without power management enabled, all commands except `get pwrmgt.support` return:
+```
+ERROR: Power management not supported
+```
+
+## Debug Output
+
+When `MESH_DEBUG=1` is enabled, the power management module outputs:
+```
+DEBUG: PWRMGT: Reset = Wake from LPCOMP (0x20000); Shutdown = Low Voltage (0x4C)
+DEBUG: PWRMGT: Boot voltage = 3450 mV (threshold = 3300 mV)
+DEBUG: PWRMGT: LPCOMP wake configured (AIN7, ref=3/8 VDD)
+```
+
+## Phase 2 (Planned)
+
+- Runtime voltage monitoring
+- Voltage state machine (Normal -> Warning -> Critical -> Shutdown)
+- Configurable thresholds
+- Load shedding callbacks for power reduction
+- Deep sleep integration
+- Scheduled wake-up
+- Extended sleep with periodic monitoring
+
+## References
+
+- [nRF52840 Product Specification - POWER](https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html)
+- [nRF52840 Product Specification - LPCOMP](https://infocenter.nordicsemi.com/topic/ps_nrf52840/lpcomp.html)
+- [SoftDevice S140 API - Power Management](https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/group__nrf__sdm__api.html)

docs/payloads.md

@@ -103,7 +103,9 @@ Request type
 | `0x02` | keepalive            | (deprecated) |
 | `0x03` | get telemetry data   | TODO |
 | `0x04` | get min,max,avg data | sensor nodes - get min, max, average for given time span |
-| `0x05` | get access list      | get node's approved access list       |
+| `0x05` | get access list      | get node's approved access list            |
+| `0x06` | get neighbors        | get repeater node's neighbors              |
+| `0x07` | get owner info       | get repeater firmware-ver/name/owner info  |
 
 ### Get stats
 
@@ -132,6 +134,27 @@ Gets information about the node, possibly including the following:
 
 Request data about sensors on the node, including battery level.
 
+### Get Telemetry
+
+TODO
+
+### Get Min/Max/Ave  (Sensor nodes)
+
+TODO
+
+### Get Access List
+
+TODO
+
+### Get Neighors
+
+TODO
+
+### Get Owner Info
+
+TODO
+
+
 ## Response
 
 | Field   | Size (bytes)    | Description |
@@ -179,6 +202,34 @@ txt_type
 | timestamp      | 4               | sender time (unix timestamp)                                                  |
 | password       | rest of message | password for repeater/sensor                                                  |
 
+## Repeater - Regions request
+
+| Field          | Size (bytes)    | Description                                                                   |
+|----------------|-----------------|-------------------------------------------------------------------------------|
+| timestamp      | 4               | sender time (unix timestamp)                                                  |
+| req type       | 1               | 0x01 (request sub type)                                                       |
+| reply path len | 1               | path len for reply                                                       |
+| reply path     | (variable)      | reply path                                                       |
+
+## Repeater - Owner info request
+
+| Field          | Size (bytes)    | Description                                                                   |
+|----------------|-----------------|-------------------------------------------------------------------------------|
+| timestamp      | 4               | sender time (unix timestamp)                                                  |
+| req type       | 1               | 0x02 (request sub type)                                                       |
+| reply path len | 1               | path len for reply                                                       |
+| reply path     | (variable)      | reply path                                                       |
+
+## Repeater - Clock and status request
+
+| Field          | Size (bytes)    | Description                                                                   |
+|----------------|-----------------|-------------------------------------------------------------------------------|
+| timestamp      | 4               | sender time (unix timestamp)                                                  |
+| req type       | 1               | 0x03 (request sub type)                                                       |
+| reply path len | 1               | path len for reply                                                       |
+| reply path     | (variable)      | reply path                                                       |
+
+
 # Group text message / datagram
 
 | Field        | Size (bytes)    | Description                                |

docs/stats_binary_frames.md

@@ -0,0 +1,328 @@
+# Stats Binary Frame Structures
+
+Binary frame structures for companion radio stats commands. All multi-byte integers use little-endian byte order.
+
+## Command Codes
+
+| Command | Code | Description |
+|---------|------|-------------|
+| `CMD_GET_STATS` | 56 | Get statistics (2-byte command: code + sub-type) |
+
+### Stats Sub-Types
+
+The `CMD_GET_STATS` command uses a 2-byte frame structure:
+- **Byte 0:** `CMD_GET_STATS` (56)
+- **Byte 1:** Stats sub-type:
+  - `STATS_TYPE_CORE` (0) - Get core device statistics
+  - `STATS_TYPE_RADIO` (1) - Get radio statistics
+  - `STATS_TYPE_PACKETS` (2) - Get packet statistics
+
+## Response Codes
+
+| Response | Code | Description |
+|----------|------|-------------|
+| `RESP_CODE_STATS` | 24 | Statistics response (2-byte response: code + sub-type) |
+
+### Stats Response Sub-Types
+
+The `RESP_CODE_STATS` response uses a 2-byte header structure:
+- **Byte 0:** `RESP_CODE_STATS` (24)
+- **Byte 1:** Stats sub-type (matches command sub-type):
+  - `STATS_TYPE_CORE` (0) - Core device statistics response
+  - `STATS_TYPE_RADIO` (1) - Radio statistics response
+  - `STATS_TYPE_PACKETS` (2) - Packet statistics response
+
+---
+
+## RESP_CODE_STATS + STATS_TYPE_CORE (24, 0)
+
+**Total Frame Size:** 11 bytes
+
+| Offset | Size | Type | Field Name | Description | Range/Notes |
+|--------|------|------|------------|-------------|-------------|
+| 0 | 1 | uint8_t | response_code | Always `0x18` (24) | - |
+| 1 | 1 | uint8_t | stats_type | Always `0x00` (STATS_TYPE_CORE) | - |
+| 2 | 2 | uint16_t | battery_mv | Battery voltage in millivolts | 0 - 65,535 |
+| 4 | 4 | uint32_t | uptime_secs | Device uptime in seconds | 0 - 4,294,967,295 |
+| 8 | 2 | uint16_t | errors | Error flags bitmask | - |
+| 10 | 1 | uint8_t | queue_len | Outbound packet queue length | 0 - 255 |
+
+### Example Structure (C/C++)
+
+```c
+struct StatsCore {
+    uint8_t  response_code;  // 0x18
+    uint8_t  stats_type;     // 0x00 (STATS_TYPE_CORE)
+    uint16_t battery_mv;
+    uint32_t uptime_secs;
+    uint16_t errors;
+    uint8_t  queue_len;
+} __attribute__((packed));
+```
+
+---
+
+## RESP_CODE_STATS + STATS_TYPE_RADIO (24, 1)
+
+**Total Frame Size:** 14 bytes
+
+| Offset | Size | Type | Field Name | Description | Range/Notes |
+|--------|------|------|------------|-------------|-------------|
+| 0 | 1 | uint8_t | response_code | Always `0x18` (24) | - |
+| 1 | 1 | uint8_t | stats_type | Always `0x01` (STATS_TYPE_RADIO) | - |
+| 2 | 2 | int16_t | noise_floor | Radio noise floor in dBm | -140 to +10 |
+| 4 | 1 | int8_t | last_rssi | Last received signal strength in dBm | -128 to +127 |
+| 5 | 1 | int8_t | last_snr | SNR scaled by 4 | Divide by 4.0 for dB |
+| 6 | 4 | uint32_t | tx_air_secs | Cumulative transmit airtime in seconds | 0 - 4,294,967,295 |
+| 10 | 4 | uint32_t | rx_air_secs | Cumulative receive airtime in seconds | 0 - 4,294,967,295 |
+
+### Example Structure (C/C++)
+
+```c
+struct StatsRadio {
+    uint8_t  response_code;  // 0x18
+    uint8_t  stats_type;     // 0x01 (STATS_TYPE_RADIO)
+    int16_t  noise_floor;
+    int8_t   last_rssi;
+    int8_t   last_snr;       // Divide by 4.0 to get actual SNR in dB
+    uint32_t tx_air_secs;
+    uint32_t rx_air_secs;
+} __attribute__((packed));
+```
+
+---
+
+## RESP_CODE_STATS + STATS_TYPE_PACKETS (24, 2)
+
+**Total Frame Size:** 26 bytes (legacy) or 30 bytes (includes `recv_errors`)
+
+| Offset | Size | Type | Field Name | Description | Range/Notes |
+|--------|------|------|------------|-------------|-------------|
+| 0 | 1 | uint8_t | response_code | Always `0x18` (24) | - |
+| 1 | 1 | uint8_t | stats_type | Always `0x02` (STATS_TYPE_PACKETS) | - |
+| 2 | 4 | uint32_t | recv | Total packets received | 0 - 4,294,967,295 |
+| 6 | 4 | uint32_t | sent | Total packets sent | 0 - 4,294,967,295 |
+| 10 | 4 | uint32_t | flood_tx | Packets sent via flood routing | 0 - 4,294,967,295 |
+| 14 | 4 | uint32_t | direct_tx | Packets sent via direct routing | 0 - 4,294,967,295 |
+| 18 | 4 | uint32_t | flood_rx | Packets received via flood routing | 0 - 4,294,967,295 |
+| 22 | 4 | uint32_t | direct_rx | Packets received via direct routing | 0 - 4,294,967,295 |
+| 26 | 4 | uint32_t | recv_errors | Receive/CRC errors (RadioLib); present only in 30-byte frame | 0 - 4,294,967,295 |
+
+### Notes
+
+- Counters are cumulative from boot and may wrap.
+- `recv = flood_rx + direct_rx`
+- `sent = flood_tx + direct_tx`
+- Clients should accept frame length ≥ 26; if length ≥ 30, parse `recv_errors` at offset 26.
+
+### Example Structure (C/C++)
+
+```c
+struct StatsPackets {
+    uint8_t  response_code;  // 0x18
+    uint8_t  stats_type;     // 0x02 (STATS_TYPE_PACKETS)
+    uint32_t recv;
+    uint32_t sent;
+    uint32_t flood_tx;
+    uint32_t direct_tx;
+    uint32_t flood_rx;
+    uint32_t direct_rx;
+    uint32_t recv_errors;    // present when frame size is 30
+} __attribute__((packed));
+```
+
+---
+
+## Command Usage Example (Python)
+
+```python
+# Send CMD_GET_STATS command
+def send_get_stats_core(serial_interface):
+    """Send command to get core stats"""
+    cmd = bytes([56, 0])  # CMD_GET_STATS (56) + STATS_TYPE_CORE (0)
+    serial_interface.write(cmd)
+
+def send_get_stats_radio(serial_interface):
+    """Send command to get radio stats"""
+    cmd = bytes([56, 1])  # CMD_GET_STATS (56) + STATS_TYPE_RADIO (1)
+    serial_interface.write(cmd)
+
+def send_get_stats_packets(serial_interface):
+    """Send command to get packet stats"""
+    cmd = bytes([56, 2])  # CMD_GET_STATS (56) + STATS_TYPE_PACKETS (2)
+    serial_interface.write(cmd)
+```
+
+---
+
+## Response Parsing Example (Python)
+
+```python
+import struct
+
+def parse_stats_core(frame):
+    """Parse RESP_CODE_STATS + STATS_TYPE_CORE frame (11 bytes)"""
+    response_code, stats_type, battery_mv, uptime_secs, errors, queue_len = \
+        struct.unpack('<B B H I H B', frame)
+    assert response_code == 24 and stats_type == 0, "Invalid response type"
+    return {
+        'battery_mv': battery_mv,
+        'uptime_secs': uptime_secs,
+        'errors': errors,
+        'queue_len': queue_len
+    }
+
+def parse_stats_radio(frame):
+    """Parse RESP_CODE_STATS + STATS_TYPE_RADIO frame (14 bytes)"""
+    response_code, stats_type, noise_floor, last_rssi, last_snr, tx_air_secs, rx_air_secs = \
+        struct.unpack('<B B h b b I I', frame)
+    assert response_code == 24 and stats_type == 1, "Invalid response type"
+    return {
+        'noise_floor': noise_floor,
+        'last_rssi': last_rssi,
+        'last_snr': last_snr / 4.0,  # Unscale SNR
+        'tx_air_secs': tx_air_secs,
+        'rx_air_secs': rx_air_secs
+    }
+
+def parse_stats_packets(frame):
+    """Parse RESP_CODE_STATS + STATS_TYPE_PACKETS frame (26 or 30 bytes)"""
+    assert len(frame) >= 26, "STATS_TYPE_PACKETS frame too short"
+    response_code, stats_type, recv, sent, flood_tx, direct_tx, flood_rx, direct_rx = \
+        struct.unpack('<B B I I I I I I', frame[:26])
+    assert response_code == 24 and stats_type == 2, "Invalid response type"
+    result = {
+        'recv': recv,
+        'sent': sent,
+        'flood_tx': flood_tx,
+        'direct_tx': direct_tx,
+        'flood_rx': flood_rx,
+        'direct_rx': direct_rx
+    }
+    if len(frame) >= 30:
+        (recv_errors,) = struct.unpack('<I', frame[26:30])
+        result['recv_errors'] = recv_errors
+    return result
+```
+
+---
+
+## Command Usage Example (JavaScript/TypeScript)
+
+```typescript
+// Send CMD_GET_STATS command
+const CMD_GET_STATS = 56;
+const STATS_TYPE_CORE = 0;
+const STATS_TYPE_RADIO = 1;
+const STATS_TYPE_PACKETS = 2;
+
+function sendGetStatsCore(serialInterface: SerialPort): void {
+    const cmd = new Uint8Array([CMD_GET_STATS, STATS_TYPE_CORE]);
+    serialInterface.write(cmd);
+}
+
+function sendGetStatsRadio(serialInterface: SerialPort): void {
+    const cmd = new Uint8Array([CMD_GET_STATS, STATS_TYPE_RADIO]);
+    serialInterface.write(cmd);
+}
+
+function sendGetStatsPackets(serialInterface: SerialPort): void {
+    const cmd = new Uint8Array([CMD_GET_STATS, STATS_TYPE_PACKETS]);
+    serialInterface.write(cmd);
+}
+```
+
+---
+
+## Response Parsing Example (JavaScript/TypeScript)
+
+```typescript
+interface StatsCore {
+    battery_mv: number;
+    uptime_secs: number;
+    errors: number;
+    queue_len: number;
+}
+
+interface StatsRadio {
+    noise_floor: number;
+    last_rssi: number;
+    last_snr: number;
+    tx_air_secs: number;
+    rx_air_secs: number;
+}
+
+interface StatsPackets {
+    recv: number;
+    sent: number;
+    flood_tx: number;
+    direct_tx: number;
+    flood_rx: number;
+    direct_rx: number;
+    recv_errors?: number;  // present when frame is 30 bytes
+}
+
+function parseStatsCore(buffer: ArrayBuffer): StatsCore {
+    const view = new DataView(buffer);
+    const response_code = view.getUint8(0);
+    const stats_type = view.getUint8(1);
+    if (response_code !== 24 || stats_type !== 0) {
+        throw new Error('Invalid response type');
+    }
+    return {
+        battery_mv: view.getUint16(2, true),
+        uptime_secs: view.getUint32(4, true),
+        errors: view.getUint16(8, true),
+        queue_len: view.getUint8(10)
+    };
+}
+
+function parseStatsRadio(buffer: ArrayBuffer): StatsRadio {
+    const view = new DataView(buffer);
+    const response_code = view.getUint8(0);
+    const stats_type = view.getUint8(1);
+    if (response_code !== 24 || stats_type !== 1) {
+        throw new Error('Invalid response type');
+    }
+    return {
+        noise_floor: view.getInt16(2, true),
+        last_rssi: view.getInt8(4),
+        last_snr: view.getInt8(5) / 4.0,  // Unscale SNR
+        tx_air_secs: view.getUint32(6, true),
+        rx_air_secs: view.getUint32(10, true)
+    };
+}
+
+function parseStatsPackets(buffer: ArrayBuffer): StatsPackets {
+    const view = new DataView(buffer);
+    if (buffer.byteLength < 26) {
+        throw new Error('STATS_TYPE_PACKETS frame too short');
+    }
+    const response_code = view.getUint8(0);
+    const stats_type = view.getUint8(1);
+    if (response_code !== 24 || stats_type !== 2) {
+        throw new Error('Invalid response type');
+    }
+    const result: StatsPackets = {
+        recv: view.getUint32(2, true),
+        sent: view.getUint32(6, true),
+        flood_tx: view.getUint32(10, true),
+        direct_tx: view.getUint32(14, true),
+        flood_rx: view.getUint32(18, true),
+        direct_rx: view.getUint32(22, true)
+    };
+    if (buffer.byteLength >= 30) {
+        result.recv_errors = view.getUint32(26, true);
+    }
+    return result;
+}
+```
+
+---
+
+## Field Size Considerations
+
+- Packet counters (uint32_t): May wrap after extended high-traffic operation.
+- Time fields (uint32_t): Max ~136 years.
+- SNR (int8_t, scaled by 4): Range -32 to +31.75 dB, 0.25 dB precision.
+

examples/companion_radio/DataStore.cpp

@@ -65,6 +65,7 @@ void DataStore::begin() {
 
 #if defined(ESP32)
   #include <SPIFFS.h>
+  #include <nvs_flash.h>
 #elif defined(RP2040_PLATFORM)
   #include <LittleFS.h>
 #elif defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
@@ -172,7 +173,9 @@ bool DataStore::formatFileSystem() {
 #elif defined(RP2040_PLATFORM)
   return LittleFS.format();
 #elif defined(ESP32)
-  return ((fs::SPIFFSFS *)_fs)->format();
+  bool fs_success = ((fs::SPIFFSFS *)_fs)->format();
+  esp_err_t nvs_err = nvs_flash_erase(); // no need to reinit, will be done by reboot
+  return fs_success && (nvs_err == ESP_OK);
 #else
   #error "need to implement format()"
 #endif
@@ -209,7 +212,7 @@ void DataStore::loadPrefsInt(const char *filename, NodePrefs& _prefs, double& no
     file.read((uint8_t *)&_prefs.freq, sizeof(_prefs.freq));                               // 56
     file.read((uint8_t *)&_prefs.sf, sizeof(_prefs.sf));                                   // 60
     file.read((uint8_t *)&_prefs.cr, sizeof(_prefs.cr));                                   // 61
-    file.read(pad, 1);                                                                     // 62
+    file.read((uint8_t *)&_prefs.client_repeat, sizeof(_prefs.client_repeat));             // 62
     file.read((uint8_t *)&_prefs.manual_add_contacts, sizeof(_prefs.manual_add_contacts)); // 63
     file.read((uint8_t *)&_prefs.bw, sizeof(_prefs.bw));                                   // 64
     file.read((uint8_t *)&_prefs.tx_power_dbm, sizeof(_prefs.tx_power_dbm));               // 68
@@ -219,8 +222,13 @@ void DataStore::loadPrefsInt(const char *filename, NodePrefs& _prefs, double& no
     file.read((uint8_t *)&_prefs.rx_delay_base, sizeof(_prefs.rx_delay_base));             // 72
     file.read((uint8_t *)&_prefs.advert_loc_policy, sizeof(_prefs.advert_loc_policy));     // 76
     file.read((uint8_t *)&_prefs.multi_acks, sizeof(_prefs.multi_acks));                   // 77
-    file.read(pad, 2);                                                                     // 78
+    file.read((uint8_t *)&_prefs.path_hash_mode, sizeof(_prefs.path_hash_mode));           // 78
+    file.read(pad, 1);                                                                     // 79
     file.read((uint8_t *)&_prefs.ble_pin, sizeof(_prefs.ble_pin));                         // 80
+    file.read((uint8_t *)&_prefs.buzzer_quiet, sizeof(_prefs.buzzer_quiet));               // 84
+    file.read((uint8_t *)&_prefs.gps_enabled, sizeof(_prefs.gps_enabled));                 // 85
+    file.read((uint8_t *)&_prefs.gps_interval, sizeof(_prefs.gps_interval));               // 86
+    file.read((uint8_t *)&_prefs.autoadd_config, sizeof(_prefs.autoadd_config));           // 87
 
     file.close();
   }
@@ -240,7 +248,7 @@ void DataStore::savePrefs(const NodePrefs& _prefs, double node_lat, double node_
     file.write((uint8_t *)&_prefs.freq, sizeof(_prefs.freq));                               // 56
     file.write((uint8_t *)&_prefs.sf, sizeof(_prefs.sf));                                   // 60
     file.write((uint8_t *)&_prefs.cr, sizeof(_prefs.cr));                                   // 61
-    file.write(pad, 1);                                                                     // 62
+    file.write((uint8_t *)&_prefs.client_repeat, sizeof(_prefs.client_repeat));             // 62
     file.write((uint8_t *)&_prefs.manual_add_contacts, sizeof(_prefs.manual_add_contacts)); // 63
     file.write((uint8_t *)&_prefs.bw, sizeof(_prefs.bw));                                   // 64
     file.write((uint8_t *)&_prefs.tx_power_dbm, sizeof(_prefs.tx_power_dbm));               // 68
@@ -250,8 +258,13 @@ void DataStore::savePrefs(const NodePrefs& _prefs, double node_lat, double node_
     file.write((uint8_t *)&_prefs.rx_delay_base, sizeof(_prefs.rx_delay_base));             // 72
     file.write((uint8_t *)&_prefs.advert_loc_policy, sizeof(_prefs.advert_loc_policy));     // 76
     file.write((uint8_t *)&_prefs.multi_acks, sizeof(_prefs.multi_acks));                   // 77
-    file.write(pad, 2);                                                                     // 78
+    file.write((uint8_t *)&_prefs.path_hash_mode, sizeof(_prefs.path_hash_mode));           // 78
+    file.write(pad, 1);                                                                     // 79
     file.write((uint8_t *)&_prefs.ble_pin, sizeof(_prefs.ble_pin));                         // 80
+    file.write((uint8_t *)&_prefs.buzzer_quiet, sizeof(_prefs.buzzer_quiet));               // 84
+    file.write((uint8_t *)&_prefs.gps_enabled, sizeof(_prefs.gps_enabled));                 // 85
+    file.write((uint8_t *)&_prefs.gps_interval, sizeof(_prefs.gps_interval));               // 86
+    file.write((uint8_t *)&_prefs.autoadd_config, sizeof(_prefs.autoadd_config));           // 87
 
     file.close();
   }
@@ -549,14 +562,20 @@ bool DataStore::putBlobByKey(const uint8_t key[], int key_len, const uint8_t src
   }
   return false; // error
 }
+bool DataStore::deleteBlobByKey(const uint8_t key[], int key_len) {
+  return true; // this is just a stub on NRF52/STM32 platforms
+}
 #else
-uint8_t DataStore::getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_buf[]) {
-  char path[64];
+inline void makeBlobPath(const uint8_t key[], int key_len, char* path, size_t path_size) {
   char fname[18];
-
   if (key_len > 8) key_len = 8; // just use first 8 bytes (prefix)
   mesh::Utils::toHex(fname, key, key_len);
   sprintf(path, "/bl/%s", fname);
+}
+
+uint8_t DataStore::getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_buf[]) {
+  char path[64];
+  makeBlobPath(key, key_len, path, sizeof(path));
 
   if (_fs->exists(path)) {
     File f = openRead(_fs, path);
@@ -571,11 +590,7 @@ uint8_t DataStore::getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_b
 
 bool DataStore::putBlobByKey(const uint8_t key[], int key_len, const uint8_t src_buf[], uint8_t len) {
   char path[64];
-  char fname[18];
-
-  if (key_len > 8) key_len = 8; // just use first 8 bytes (prefix)
-  mesh::Utils::toHex(fname, key, key_len);
-  sprintf(path, "/bl/%s", fname);
+  makeBlobPath(key, key_len, path, sizeof(path));
 
   File f = openWrite(_fs, path);
   if (f) {
@@ -587,4 +602,13 @@ bool DataStore::putBlobByKey(const uint8_t key[], int key_len, const uint8_t src
   }
   return false; // error
 }
+
+bool DataStore::deleteBlobByKey(const uint8_t key[], int key_len) {
+  char path[64];
+  makeBlobPath(key, key_len, path, sizeof(path));
+
+  _fs->remove(path);
+  
+  return true; // return true even if file did not exist
+}
 #endif

examples/companion_radio/DataStore.h

@@ -42,6 +42,7 @@ public:
   void migrateToSecondaryFS();
   uint8_t getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_buf[]);
   bool putBlobByKey(const uint8_t key[], int key_len, const uint8_t src_buf[], uint8_t len);
+  bool deleteBlobByKey(const uint8_t key[], int key_len);
   File openRead(const char* filename);
   File openRead(FILESYSTEM* fs, const char* filename);
   bool removeFile(const char* filename);

examples/companion_radio/MyMesh.cpp

@@ -52,6 +52,17 @@
 #define CMD_SEND_PATH_DISCOVERY_REQ   52
 #define CMD_SET_FLOOD_SCOPE           54   // v8+
 #define CMD_SEND_CONTROL_DATA         55   // v8+
+#define CMD_GET_STATS                 56   // v8+, second byte is stats type
+#define CMD_SEND_ANON_REQ             57
+#define CMD_SET_AUTOADD_CONFIG        58
+#define CMD_GET_AUTOADD_CONFIG        59
+#define CMD_GET_ALLOWED_REPEAT_FREQ   60
+#define CMD_SET_PATH_HASH_MODE        61
+
+// Stats sub-types for CMD_GET_STATS
+#define STATS_TYPE_CORE               0
+#define STATS_TYPE_RADIO              1
+#define STATS_TYPE_PACKETS             2
 
 #define RESP_CODE_OK                  0
 #define RESP_CODE_ERR                 1
@@ -77,6 +88,9 @@
 #define RESP_CODE_CUSTOM_VARS         21
 #define RESP_CODE_ADVERT_PATH         22
 #define RESP_CODE_TUNING_PARAMS       23
+#define RESP_CODE_STATS               24   // v8+, second byte is stats type
+#define RESP_CODE_AUTOADD_CONFIG      25
+#define RESP_ALLOWED_REPEAT_FREQ      26
 
 #define SEND_TIMEOUT_BASE_MILLIS        500
 #define FLOOD_SEND_TIMEOUT_FACTOR       16.0f
@@ -102,6 +116,8 @@
 #define PUSH_CODE_BINARY_RESPONSE       0x8C
 #define PUSH_CODE_PATH_DISCOVERY_RESPONSE 0x8D
 #define PUSH_CODE_CONTROL_DATA          0x8E   // v8+
+#define PUSH_CODE_CONTACT_DELETED       0x8F // used to notify client app of deleted contact when overwriting oldest
+#define PUSH_CODE_CONTACTS_FULL         0x90 // used to notify client app that contacts storage is full
 
 #define ERR_CODE_UNSUPPORTED_CMD        1
 #define ERR_CODE_NOT_FOUND              2
@@ -112,6 +128,15 @@
 
 #define MAX_SIGN_DATA_LEN               (8 * 1024) // 8K
 
+// Auto-add config bitmask
+// Bit 0: If set, overwrite oldest non-favourite contact when contacts file is full
+// Bits 1-4: these indicate which contact types to auto-add when manual_contact_mode = 0x01
+#define AUTO_ADD_OVERWRITE_OLDEST (1 << 0)  // 0x01 - overwrite oldest non-favourite when full
+#define AUTO_ADD_CHAT             (1 << 1)  // 0x02 - auto-add Chat (Companion) (ADV_TYPE_CHAT)
+#define AUTO_ADD_REPEATER         (1 << 2)  // 0x04 - auto-add Repeater (ADV_TYPE_REPEATER)
+#define AUTO_ADD_ROOM_SERVER      (1 << 3)  // 0x08 - auto-add Room Server (ADV_TYPE_ROOM)
+#define AUTO_ADD_SENSOR           (1 << 4)  // 0x10 - auto-add Sensor (ADV_TYPE_SENSOR)
+
 void MyMesh::writeOKFrame() {
   uint8_t buf[1];
   buf[0] = RESP_CODE_OK;
@@ -233,6 +258,15 @@ int MyMesh::calcRxDelay(float score, uint32_t air_time) const {
   return (int)((pow(_prefs.rx_delay_base, 0.85f - score) - 1.0) * air_time);
 }
 
+uint32_t MyMesh::getRetransmitDelay(const mesh::Packet *packet) {
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * 0.5f);
+  return getRNG()->nextInt(0, 5*t + 1);
+}
+uint32_t MyMesh::getDirectRetransmitDelay(const mesh::Packet *packet) {
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * 0.2f);
+  return getRNG()->nextInt(0, 5*t + 1);
+}
+
 uint8_t MyMesh::getExtraAckTransmitCount() const {
   return _prefs.multi_acks;
 }
@@ -254,9 +288,55 @@ bool MyMesh::isAutoAddEnabled() const {
   return (_prefs.manual_add_contacts & 1) == 0;
 }
 
+bool MyMesh::shouldAutoAddContactType(uint8_t contact_type) const {
+  if ((_prefs.manual_add_contacts & 1) == 0) {
+    return true;
+  }
+  
+  uint8_t type_bit = 0;
+  switch (contact_type) {
+    case ADV_TYPE_CHAT:
+      type_bit = AUTO_ADD_CHAT;
+      break;
+    case ADV_TYPE_REPEATER:
+      type_bit = AUTO_ADD_REPEATER;
+      break;
+    case ADV_TYPE_ROOM:
+      type_bit = AUTO_ADD_ROOM_SERVER;
+      break;
+    case ADV_TYPE_SENSOR:
+      type_bit = AUTO_ADD_SENSOR;
+      break;
+    default:
+      return false;  // Unknown type, don't auto-add
+  }
+  
+  return (_prefs.autoadd_config & type_bit) != 0;
+}
+
+bool MyMesh::shouldOverwriteWhenFull() const {
+  return (_prefs.autoadd_config & AUTO_ADD_OVERWRITE_OLDEST) != 0;
+}
+
+void MyMesh::onContactOverwrite(const uint8_t* pub_key) {
+    _store->deleteBlobByKey(pub_key, PUB_KEY_SIZE); // delete from storage
+  if (_serial->isConnected()) {
+    out_frame[0] = PUSH_CODE_CONTACT_DELETED;
+    memcpy(&out_frame[1], pub_key, PUB_KEY_SIZE);
+    _serial->writeFrame(out_frame, 1 + PUB_KEY_SIZE);
+  }
+}
+
+void MyMesh::onContactsFull() {
+  if (_serial->isConnected()) {
+    out_frame[0] = PUSH_CODE_CONTACTS_FULL;
+    _serial->writeFrame(out_frame, 1);
+  }
+}
+
 void MyMesh::onDiscoveredContact(ContactInfo &contact, bool is_new, uint8_t path_len, const uint8_t* path) {
   if (_serial->isConnected()) {
-    if (!isAutoAddEnabled() && is_new) {
+    if (is_new) {
       writeContactRespFrame(PUSH_CODE_NEW_ADVERT, contact);
     } else {
       out_frame[0] = PUSH_CODE_ADVERT;
@@ -270,7 +350,7 @@ void MyMesh::onDiscoveredContact(ContactInfo &contact, bool is_new, uint8_t path
   }
 
   // add inbound-path to mem cache
-  if (path && path_len <= sizeof(AdvertPath::path)) {  // check path is valid
+  if (path && mesh::Packet::isValidPathLen(path_len)) {  // check path is valid
     AdvertPath* p = advert_paths;
     uint32_t oldest = 0xFFFFFFFF;
     for (int i = 0; i < ADVERT_PATH_TABLE_SIZE; i++) {   // check if already in table, otherwise evict oldest
@@ -287,11 +367,10 @@ void MyMesh::onDiscoveredContact(ContactInfo &contact, bool is_new, uint8_t path
     memcpy(p->pubkey_prefix, contact.id.pub_key, sizeof(p->pubkey_prefix));
     strcpy(p->name, contact.name);
     p->recv_timestamp = getRTCClock()->getCurrentTime();
-    p->path_len = path_len;
-    memcpy(p->path, path, p->path_len);
+    p->path_len = mesh::Packet::copyPath(p->path, path, path_len);
   }
 
-  dirty_contacts_expiry = futureMillis(LAZY_CONTACTS_WRITE_DELAY);
+  if (!is_new) dirty_contacts_expiry = futureMillis(LAZY_CONTACTS_WRITE_DELAY); // only schedule lazy write for contacts that are in contacts[]
 }
 
 static int sort_by_recent(const void *a, const void *b) {
@@ -387,26 +466,30 @@ bool MyMesh::filterRecvFloodPacket(mesh::Packet* packet) {
   return false;
 }
 
+bool MyMesh::allowPacketForward(const mesh::Packet* packet) {
+  return _prefs.client_repeat != 0;
+}
+
 void MyMesh::sendFloodScoped(const ContactInfo& recipient, mesh::Packet* pkt, uint32_t delay_millis) {
   // TODO: dynamic send_scope, depending on recipient and current 'home' Region
   if (send_scope.isNull()) {
-    sendFlood(pkt, delay_millis);
+    sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
   } else {
     uint16_t codes[2];
     codes[0] = send_scope.calcTransportCode(pkt);
     codes[1] = 0;  // REVISIT: set to 'home' Region, for sender/return region?
-    sendFlood(pkt, codes, delay_millis);
+    sendFlood(pkt, codes, delay_millis, _prefs.path_hash_mode + 1);
   }
 }
 void MyMesh::sendFloodScoped(const mesh::GroupChannel& channel, mesh::Packet* pkt, uint32_t delay_millis) {
   // TODO: have per-channel send_scope
   if (send_scope.isNull()) {
-    sendFlood(pkt, delay_millis);
+    sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
   } else {
     uint16_t codes[2];
     codes[0] = send_scope.calcTransportCode(pkt);
     codes[1] = 0;  // REVISIT: set to 'home' Region, for sender/return region?
-    sendFlood(pkt, codes, delay_millis);
+    sendFlood(pkt, codes, delay_millis, _prefs.path_hash_mode + 1);
   }
 }
 
@@ -603,7 +686,7 @@ bool MyMesh::onContactPathRecv(ContactInfo& contact, uint8_t* in_path, uint8_t i
     if (tag == pending_discovery) {  // check for matching response tag)
       pending_discovery = 0;
 
-      if (in_path_len > MAX_PATH_SIZE || out_path_len > MAX_PATH_SIZE) {
+      if (!mesh::Packet::isValidPathLen(in_path_len) || !mesh::Packet::isValidPathLen(out_path_len)) {
         MESH_DEBUG_PRINTLN("onContactPathRecv, invalid path sizes: %d, %d", in_path_len, out_path_len);
       } else {
         int i = 0;
@@ -612,11 +695,9 @@ bool MyMesh::onContactPathRecv(ContactInfo& contact, uint8_t* in_path, uint8_t i
         memcpy(&out_frame[i], contact.id.pub_key, 6);
         i += 6; // pub_key_prefix
         out_frame[i++] = out_path_len;
-        memcpy(&out_frame[i], out_path, out_path_len);
-        i += out_path_len;
+        i += mesh::Packet::writePath(&out_frame[i], out_path, out_path_len);
         out_frame[i++] = in_path_len;
-        memcpy(&out_frame[i], in_path, in_path_len);
-        i += in_path_len;
+        i += mesh::Packet::writePath(&out_frame[i], in_path, in_path_len);
         // NOTE: telemetry data in 'extra' is discarded at present
 
         _serial->writeFrame(out_frame, i);
@@ -670,6 +751,11 @@ void MyMesh::onRawDataRecv(mesh::Packet *packet) {
 
 void MyMesh::onTraceRecv(mesh::Packet *packet, uint32_t tag, uint32_t auth_code, uint8_t flags,
                          const uint8_t *path_snrs, const uint8_t *path_hashes, uint8_t path_len) {
+  uint8_t path_sz = flags & 0x03;  // NEW v1.11+
+  if (12 + path_len + (path_len >> path_sz) + 1 > sizeof(out_frame)) {
+    MESH_DEBUG_PRINTLN("onTraceRecv(), path_len is too long: %d", (uint32_t)path_len);
+    return;
+  }
   int i = 0;
   out_frame[i++] = PUSH_CODE_TRACE_DATA;
   out_frame[i++] = 0; // reserved
@@ -681,8 +767,9 @@ void MyMesh::onTraceRecv(mesh::Packet *packet, uint32_t tag, uint32_t auth_code,
   i += 4;
   memcpy(&out_frame[i], path_hashes, path_len);
   i += path_len;
-  memcpy(&out_frame[i], path_snrs, path_len);
-  i += path_len;
+
+  memcpy(&out_frame[i], path_snrs, path_len >> path_sz);
+  i += path_len >> path_sz;
   out_frame[i++] = (int8_t)(packet->getSNR() * 4); // extra/final SNR (to this node)
 
   if (_serial->isConnected()) {
@@ -696,9 +783,10 @@ uint32_t MyMesh::calcFloodTimeoutMillisFor(uint32_t pkt_airtime_millis) const {
   return SEND_TIMEOUT_BASE_MILLIS + (FLOOD_SEND_TIMEOUT_FACTOR * pkt_airtime_millis);
 }
 uint32_t MyMesh::calcDirectTimeoutMillisFor(uint32_t pkt_airtime_millis, uint8_t path_len) const {
+  uint8_t path_hash_count = path_len & 63;
   return SEND_TIMEOUT_BASE_MILLIS +
          ((pkt_airtime_millis * DIRECT_SEND_PERHOP_FACTOR + DIRECT_SEND_PERHOP_EXTRA_MILLIS) *
-          (path_len + 1));
+          (path_hash_count + 1));
 }
 
 void MyMesh::onSendTimeout() {}
@@ -726,6 +814,8 @@ MyMesh::MyMesh(mesh::Radio &radio, mesh::RNG &rng, mesh::RTCClock &rtc, SimpleMe
   _prefs.bw = LORA_BW;
   _prefs.cr = LORA_CR;
   _prefs.tx_power_dbm = LORA_TX_POWER;
+  _prefs.gps_enabled = 0;       // GPS disabled by default
+  _prefs.gps_interval = 0;      // No automatic GPS updates by default
   //_prefs.rx_delay_base = 10.0f;  enable once new algo fixed
 }
 
@@ -742,14 +832,14 @@ void MyMesh::begin(bool has_display) {
     _store->saveMainIdentity(self_id);
   }
 
+// if name is provided as a build flag, use that as default node name instead
+#ifdef ADVERT_NAME
+  strcpy(_prefs.node_name, ADVERT_NAME);
+#else
   // use hex of first 4 bytes of identity public key as default node name
   char pub_key_hex[10];
   mesh::Utils::toHex(pub_key_hex, self_id.pub_key, 4);
   strcpy(_prefs.node_name, pub_key_hex);
-
-// if name is provided as a build flag, use that as default node name instead
-#ifdef ADVERT_NAME
-  strcpy(_prefs.node_name, ADVERT_NAME);
 #endif
 
   // load persisted prefs
@@ -762,7 +852,9 @@ void MyMesh::begin(bool has_display) {
   _prefs.bw = constrain(_prefs.bw, 7.8f, 500.0f);
   _prefs.sf = constrain(_prefs.sf, 5, 12);
   _prefs.cr = constrain(_prefs.cr, 5, 8);
-  _prefs.tx_power_dbm = constrain(_prefs.tx_power_dbm, 1, MAX_LORA_TX_POWER);
+  _prefs.tx_power_dbm = constrain(_prefs.tx_power_dbm, -9, MAX_LORA_TX_POWER);
+  _prefs.gps_enabled = constrain(_prefs.gps_enabled, 0, 1);  // Ensure boolean 0 or 1
+  _prefs.gps_interval = constrain(_prefs.gps_interval, 0, 86400);  // Max 24 hours
 
 #ifdef BLE_PIN_CODE // 123456 by default
   if (_prefs.ble_pin == 0) {
@@ -785,6 +877,7 @@ void MyMesh::begin(bool has_display) {
 
   resetContacts();
   _store->loadContacts(this);
+  bootstrapRTCfromContacts();
   addChannel("Public", PUBLIC_GROUP_PSK); // pre-configure Andy's public channel
   _store->loadChannels(this);
 
@@ -802,6 +895,24 @@ uint32_t MyMesh::getBLEPin() {
   return _active_ble_pin;
 }
 
+struct FreqRange {
+  uint32_t lower_freq, upper_freq;
+};
+
+static FreqRange repeat_freq_ranges[] = {
+  { 433000, 433000 },
+  { 869000, 869000 },
+  { 918000, 918000 }
+};
+
+bool MyMesh::isValidClientRepeatFreq(uint32_t f) const {
+  for (int i = 0; i < sizeof(repeat_freq_ranges)/sizeof(repeat_freq_ranges[0]); i++) {
+    auto r = &repeat_freq_ranges[i];
+    if (f >= r->lower_freq && f <= r->upper_freq) return true;
+  }
+  return false;
+}
+
 void MyMesh::startInterface(BaseSerialInterface &serial) {
   _serial = &serial;
   serial.enable();
@@ -825,6 +936,8 @@ void MyMesh::handleCmdFrame(size_t len) {
     i += 40;
     StrHelper::strzcpy((char *)&out_frame[i], FIRMWARE_VERSION, 20);
     i += 20;
+    out_frame[i++] = _prefs.client_repeat;   // v9+
+    out_frame[i++] = _prefs.path_hash_mode;  // v10+
     _serial->writeFrame(out_frame, i);
   } else if (cmd_frame[0] == CMD_APP_START &&
              len >= 8) { // sent when app establishes connection, respond with node ID
@@ -886,6 +999,7 @@ void MyMesh::handleCmdFrame(size_t len) {
       int result;
       uint32_t expected_ack;
       if (txt_type == TXT_TYPE_CLI_DATA) {
+        msg_timestamp = getRTCClock()->getCurrentTimeUnique(); // Use node's RTC instead of app timestamp to avoid tripping replay protection
         result = sendCommandData(*recipient, msg_timestamp, attempt, text, est_timeout);
         expected_ack = 0; // no Ack expected
       } else {
@@ -1001,7 +1115,8 @@ void MyMesh::handleCmdFrame(size_t len) {
     }
     if (pkt) {
       if (len >= 2 && cmd_frame[1] == 1) { // optional param (1 = flood, 0 = zero hop)
-        sendFlood(pkt);
+        unsigned long delay_millis = 0;
+        sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
       } else {
         sendZeroHop(pkt);
       }
@@ -1013,7 +1128,7 @@ void MyMesh::handleCmdFrame(size_t len) {
     uint8_t *pub_key = &cmd_frame[1];
     ContactInfo *recipient = lookupContactByPubKey(pub_key, PUB_KEY_SIZE);
     if (recipient) {
-      recipient->out_path_len = -1;
+      recipient->out_path_len = OUT_PATH_UNKNOWN;
       // recipient->lastmod = ??   shouldn't be needed, app already has this version of contact
       dirty_contacts_expiry = futureMillis(LAZY_CONTACTS_WRITE_DELAY);
       writeOKFrame();
@@ -1045,6 +1160,7 @@ void MyMesh::handleCmdFrame(size_t len) {
     uint8_t *pub_key = &cmd_frame[1];
     ContactInfo *recipient = lookupContactByPubKey(pub_key, PUB_KEY_SIZE);
     if (recipient && removeContact(*recipient)) {
+      _store->deleteBlobByKey(pub_key, PUB_KEY_SIZE);
       dirty_contacts_expiry = futureMillis(LAZY_CONTACTS_WRITE_DELAY);
       writeOKFrame();
     } else {
@@ -1127,13 +1243,20 @@ void MyMesh::handleCmdFrame(size_t len) {
     i += 4;
     uint8_t sf = cmd_frame[i++];
     uint8_t cr = cmd_frame[i++];
+    uint8_t repeat = 0;  // default - false
+    if (len > i) {
+      repeat = cmd_frame[i++];   // FIRMWARE_VER_CODE  9+
+    }
 
-    if (freq >= 300000 && freq <= 2500000 && sf >= 7 && sf <= 12 && cr >= 5 && cr <= 8 && bw >= 7000 &&
+    if (repeat && !isValidClientRepeatFreq(freq)) {
+      writeErrFrame(ERR_CODE_ILLEGAL_ARG);
+    } else if (freq >= 300000 && freq <= 2500000 && sf >= 5 && sf <= 12 && cr >= 5 && cr <= 8 && bw >= 7000 &&
         bw <= 500000) {
       _prefs.sf = sf;
       _prefs.cr = cr;
       _prefs.freq = (float)freq / 1000.0;
       _prefs.bw = (float)bw / 1000.0;
+      _prefs.client_repeat = repeat;
       savePrefs();
 
       radio_set_params(_prefs.freq, _prefs.bw, _prefs.sf, _prefs.cr);
@@ -1147,10 +1270,11 @@ void MyMesh::handleCmdFrame(size_t len) {
       writeErrFrame(ERR_CODE_ILLEGAL_ARG);
     }
   } else if (cmd_frame[0] == CMD_SET_RADIO_TX_POWER) {
-    if (cmd_frame[1] > MAX_LORA_TX_POWER) {
+    int8_t power = (int8_t)cmd_frame[1];
+    if (power < -9 || power > MAX_LORA_TX_POWER) {
       writeErrFrame(ERR_CODE_ILLEGAL_ARG);
     } else {
-      _prefs.tx_power_dbm = cmd_frame[1];
+      _prefs.tx_power_dbm = power;
       savePrefs();
       radio_set_tx_power(_prefs.tx_power_dbm);
       writeOKFrame();
@@ -1189,6 +1313,14 @@ void MyMesh::handleCmdFrame(size_t len) {
     }
     savePrefs();
     writeOKFrame();
+  } else if (cmd_frame[0] == CMD_SET_PATH_HASH_MODE && cmd_frame[1] == 0 && len >= 3) {
+    if (cmd_frame[2] >= 3) {
+      writeErrFrame(ERR_CODE_ILLEGAL_ARG);
+    } else {
+      _prefs.path_hash_mode = cmd_frame[2];
+      savePrefs();
+      writeOKFrame();
+    }
   } else if (cmd_frame[0] == CMD_REBOOT && memcmp(&cmd_frame[1], "reboot", 6) == 0) {
     if (dirty_contacts_expiry) { // is there are pending dirty contacts write needed?
       saveContacts();
@@ -1216,16 +1348,20 @@ void MyMesh::handleCmdFrame(size_t len) {
 #endif
   } else if (cmd_frame[0] == CMD_IMPORT_PRIVATE_KEY && len >= 65) {
 #if ENABLE_PRIVATE_KEY_IMPORT
-    mesh::LocalIdentity identity;
-    identity.readFrom(&cmd_frame[1], 64);
-    if (_store->saveMainIdentity(identity)) {
-      self_id = identity;
-      writeOKFrame();
-      // re-load contacts, to recalc shared secrets
-      resetContacts();
-      _store->loadContacts(this);
+    if (!mesh::LocalIdentity::validatePrivateKey(&cmd_frame[1])) {
+        writeErrFrame(ERR_CODE_ILLEGAL_ARG); // invalid key
     } else {
-      writeErrFrame(ERR_CODE_FILE_IO_ERROR);
+        mesh::LocalIdentity identity;
+        identity.readFrom(&cmd_frame[1], 64);
+        if (_store->saveMainIdentity(identity)) {
+          self_id = identity;
+          writeOKFrame();
+          // re-load contacts, to invalidate ecdh shared_secrets
+          resetContacts();
+          _store->loadContacts(this);
+        } else {
+          writeErrFrame(ERR_CODE_FILE_IO_ERROR);
+        }
     }
 #else
     writeDisabledFrame();
@@ -1268,6 +1404,27 @@ void MyMesh::handleCmdFrame(size_t len) {
     } else {
       writeErrFrame(ERR_CODE_NOT_FOUND); // contact not found
     }
+  } else if (cmd_frame[0] == CMD_SEND_ANON_REQ && len > 1 + PUB_KEY_SIZE) {
+    uint8_t *pub_key = &cmd_frame[1];
+    ContactInfo *recipient = lookupContactByPubKey(pub_key, PUB_KEY_SIZE);
+    uint8_t *data = &cmd_frame[1 + PUB_KEY_SIZE];
+    if (recipient) {
+      uint32_t tag, est_timeout;
+      int result = sendAnonReq(*recipient, data, len - (1 + PUB_KEY_SIZE), tag, est_timeout);
+      if (result == MSG_SEND_FAILED) {
+        writeErrFrame(ERR_CODE_TABLE_FULL);
+      } else {
+        clearPendingReqs();
+        pending_req = tag; // match this to onContactResponse()
+        out_frame[0] = RESP_CODE_SENT;
+        out_frame[1] = (result == MSG_SEND_SENT_FLOOD) ? 1 : 0;
+        memcpy(&out_frame[2], &tag, 4);
+        memcpy(&out_frame[6], &est_timeout, 4);
+        _serial->writeFrame(out_frame, 10);
+      }
+    } else {
+      writeErrFrame(ERR_CODE_NOT_FOUND); // contact not found
+    }
   } else if (cmd_frame[0] == CMD_SEND_STATUS_REQ && len >= 1 + PUB_KEY_SIZE) {
     uint8_t *pub_key = &cmd_frame[1];
     ContactInfo *recipient = lookupContactByPubKey(pub_key, PUB_KEY_SIZE);
@@ -1301,7 +1458,7 @@ void MyMesh::handleCmdFrame(size_t len) {
       memset(&req_data[2], 0, 3);  // reserved
       getRNG()->random(&req_data[5], 4);   // random blob to help make packet-hash unique
       auto save = recipient->out_path_len;    // temporarily force sendRequest() to flood
-      recipient->out_path_len = -1;
+      recipient->out_path_len = OUT_PATH_UNKNOWN;
       int result = sendRequest(*recipient, req_data, sizeof(req_data), tag, est_timeout);
       recipient->out_path_len = save;
       if (result == MSG_SEND_FAILED) {
@@ -1446,25 +1603,31 @@ void MyMesh::handleCmdFrame(size_t len) {
     } else {
       writeErrFrame(ERR_CODE_BAD_STATE);
     }
-  } else if (cmd_frame[0] == CMD_SEND_TRACE_PATH && len > 10 && len - 10 < MAX_PATH_SIZE) {
-    uint32_t tag, auth;
-    memcpy(&tag, &cmd_frame[1], 4);
-    memcpy(&auth, &cmd_frame[5], 4);
-    auto pkt = createTrace(tag, auth, cmd_frame[9]);
-    if (pkt) {
-      uint8_t path_len = len - 10;
-      sendDirect(pkt, &cmd_frame[10], path_len);
-
-      uint32_t t = _radio->getEstAirtimeFor(pkt->payload_len + pkt->path_len + 2);
-      uint32_t est_timeout = calcDirectTimeoutMillisFor(t, path_len);
-
-      out_frame[0] = RESP_CODE_SENT;
-      out_frame[1] = 0;
-      memcpy(&out_frame[2], &tag, 4);
-      memcpy(&out_frame[6], &est_timeout, 4);
-      _serial->writeFrame(out_frame, 10);
+  } else if (cmd_frame[0] == CMD_SEND_TRACE_PATH && len > 10 && len - 10 < MAX_PACKET_PAYLOAD-5) {
+    uint8_t path_len = len - 10;
+    uint8_t flags = cmd_frame[9];
+    uint8_t path_sz = flags & 0x03;  // NEW v1.11+ 
+    if ((path_len >> path_sz) > MAX_PATH_SIZE || (path_len % (1 << path_sz)) != 0) { // make sure is multiple of path_sz
+      writeErrFrame(ERR_CODE_ILLEGAL_ARG);
     } else {
-      writeErrFrame(ERR_CODE_TABLE_FULL);
+      uint32_t tag, auth;
+      memcpy(&tag, &cmd_frame[1], 4);
+      memcpy(&auth, &cmd_frame[5], 4);
+      auto pkt = createTrace(tag, auth, flags);
+      if (pkt) {
+        sendDirect(pkt, &cmd_frame[10], path_len);
+
+        uint32_t t = _radio->getEstAirtimeFor(pkt->payload_len + pkt->path_len + 2);
+        uint32_t est_timeout = calcDirectTimeoutMillisFor(t, path_len >> path_sz);
+
+        out_frame[0] = RESP_CODE_SENT;
+        out_frame[1] = 0;
+        memcpy(&out_frame[2], &tag, 4);
+        memcpy(&out_frame[6], &est_timeout, 4);
+        _serial->writeFrame(out_frame, 10);
+      } else {
+        writeErrFrame(ERR_CODE_TABLE_FULL);
+      }
     }
   } else if (cmd_frame[0] == CMD_SET_DEVICE_PIN && len >= 5) {
 
@@ -1502,6 +1665,17 @@ void MyMesh::handleCmdFrame(size_t len) {
       *np++ = 0; // modify 'cmd_frame', replace ':' with null
       bool success = sensors.setSettingValue(sp, np);
       if (success) {
+        #if ENV_INCLUDE_GPS == 1
+        // Update node preferences for GPS settings
+        if (strcmp(sp, "gps") == 0) {
+          _prefs.gps_enabled = (np[0] == '1') ? 1 : 0;
+          savePrefs();
+        } else if (strcmp(sp, "gps_interval") == 0) {
+          uint32_t interval_seconds = atoi(np);
+          _prefs.gps_interval = constrain(interval_seconds, 0, 86400);
+          savePrefs();
+        }
+        #endif
         writeOKFrame();
       } else {
         writeErrFrame(ERR_CODE_ILLEGAL_ARG);
@@ -1521,15 +1695,71 @@ void MyMesh::handleCmdFrame(size_t len) {
       }
     }
     if (found) {
-      out_frame[0] = RESP_CODE_ADVERT_PATH;
-      memcpy(&out_frame[1], &found->recv_timestamp, 4);
-      out_frame[5] = found->path_len;
-      memcpy(&out_frame[6], found->path, found->path_len);
-      _serial->writeFrame(out_frame, 6 + found->path_len);
+      int i = 0;
+      out_frame[i++] = RESP_CODE_ADVERT_PATH;
+      memcpy(&out_frame[i], &found->recv_timestamp, 4); i += 4;
+      out_frame[i++] = found->path_len;
+      i += mesh::Packet::writePath(&out_frame[i], found->path, found->path_len);
+      _serial->writeFrame(out_frame, i);
     } else {
       writeErrFrame(ERR_CODE_NOT_FOUND);
     }
+  } else if (cmd_frame[0] == CMD_GET_STATS && len >= 2) {
+    uint8_t stats_type = cmd_frame[1];
+    if (stats_type == STATS_TYPE_CORE) {
+      int i = 0;
+      out_frame[i++] = RESP_CODE_STATS;
+      out_frame[i++] = STATS_TYPE_CORE;
+      uint16_t battery_mv = board.getBattMilliVolts();
+      uint32_t uptime_secs = _ms->getMillis() / 1000;
+      uint8_t queue_len = (uint8_t)_mgr->getOutboundCount(0xFFFFFFFF);
+      memcpy(&out_frame[i], &battery_mv, 2); i += 2;
+      memcpy(&out_frame[i], &uptime_secs, 4); i += 4;
+      memcpy(&out_frame[i], &_err_flags, 2); i += 2;
+      out_frame[i++] = queue_len;
+      _serial->writeFrame(out_frame, i);
+    } else if (stats_type == STATS_TYPE_RADIO) {
+      int i = 0;
+      out_frame[i++] = RESP_CODE_STATS;
+      out_frame[i++] = STATS_TYPE_RADIO;
+      int16_t noise_floor = (int16_t)_radio->getNoiseFloor();
+      int8_t last_rssi = (int8_t)radio_driver.getLastRSSI();
+      int8_t last_snr = (int8_t)(radio_driver.getLastSNR() * 4); // scaled by 4 for 0.25 dB precision
+      uint32_t tx_air_secs = getTotalAirTime() / 1000;
+      uint32_t rx_air_secs = getReceiveAirTime() / 1000;
+      memcpy(&out_frame[i], &noise_floor, 2); i += 2;
+      out_frame[i++] = last_rssi;
+      out_frame[i++] = last_snr;
+      memcpy(&out_frame[i], &tx_air_secs, 4); i += 4;
+      memcpy(&out_frame[i], &rx_air_secs, 4); i += 4;
+      _serial->writeFrame(out_frame, i);
+    } else if (stats_type == STATS_TYPE_PACKETS) {
+      int i = 0;
+      out_frame[i++] = RESP_CODE_STATS;
+      out_frame[i++] = STATS_TYPE_PACKETS;
+      uint32_t recv = radio_driver.getPacketsRecv();
+      uint32_t sent = radio_driver.getPacketsSent();
+      uint32_t n_sent_flood = getNumSentFlood();
+      uint32_t n_sent_direct = getNumSentDirect();
+      uint32_t n_recv_flood = getNumRecvFlood();
+      uint32_t n_recv_direct = getNumRecvDirect();
+      uint32_t n_recv_errors = radio_driver.getPacketsRecvErrors();
+      memcpy(&out_frame[i], &recv, 4); i += 4;
+      memcpy(&out_frame[i], &sent, 4); i += 4;
+      memcpy(&out_frame[i], &n_sent_flood, 4); i += 4;
+      memcpy(&out_frame[i], &n_sent_direct, 4); i += 4;
+      memcpy(&out_frame[i], &n_recv_flood, 4); i += 4;
+      memcpy(&out_frame[i], &n_recv_direct, 4); i += 4;
+      memcpy(&out_frame[i], &n_recv_errors, 4); i += 4;
+      _serial->writeFrame(out_frame, i);
+    } else {
+      writeErrFrame(ERR_CODE_ILLEGAL_ARG); // invalid stats sub-type
+    }
   } else if (cmd_frame[0] == CMD_FACTORY_RESET && memcmp(&cmd_frame[1], "reset", 5) == 0) {
+    if (_serial) {
+      MESH_DEBUG_PRINTLN("Factory reset: disabling serial interface to prevent reconnects (BLE/WiFi)");
+      _serial->disable(); // Phone app disconnects before we can send OK frame so it's safe here
+    }
     bool success = _store->formatFileSystem();
     if (success) {
       writeOKFrame();
@@ -1553,6 +1783,24 @@ void MyMesh::handleCmdFrame(size_t len) {
     } else {
       writeErrFrame(ERR_CODE_TABLE_FULL);
     }
+  } else if (cmd_frame[0] == CMD_SET_AUTOADD_CONFIG) {
+    _prefs.autoadd_config = cmd_frame[1];
+    savePrefs();
+    writeOKFrame();  
+  } else if (cmd_frame[0] == CMD_GET_AUTOADD_CONFIG) {
+    int i = 0;
+    out_frame[i++] = RESP_CODE_AUTOADD_CONFIG;
+    out_frame[i++] = _prefs.autoadd_config;
+    _serial->writeFrame(out_frame, i);
+  } else if (cmd_frame[0] == CMD_GET_ALLOWED_REPEAT_FREQ) {
+    int i = 0;
+    out_frame[i++] = RESP_ALLOWED_REPEAT_FREQ;
+    for (int k = 0; k < sizeof(repeat_freq_ranges)/sizeof(repeat_freq_ranges[0]) && i + 8 < sizeof(out_frame); k++) {
+      auto r = &repeat_freq_ranges[k];
+      memcpy(&out_frame[i], &r->lower_freq, 4); i += 4;
+      memcpy(&out_frame[i], &r->upper_freq, 4); i += 4;
+    }
+    _serial->writeFrame(out_frame, i);
   } else {
     writeErrFrame(ERR_CODE_UNSUPPORTED_CMD);
     MESH_DEBUG_PRINTLN("ERROR: unknown command: %02X", cmd_frame[0]);
@@ -1797,4 +2045,4 @@ bool MyMesh::advert() {
   } else {
     return false;
   }
-}
+}

examples/companion_radio/MyMesh.h

@@ -5,14 +5,14 @@
 #include "AbstractUITask.h"
 
 /*------------ Frame Protocol --------------*/
-#define FIRMWARE_VER_CODE 8
+#define FIRMWARE_VER_CODE 10
 
 #ifndef FIRMWARE_BUILD_DATE
-#define FIRMWARE_BUILD_DATE "13 Nov 2025"
+#define FIRMWARE_BUILD_DATE "15 Feb 2026"
 #endif
 
 #ifndef FIRMWARE_VERSION
-#define FIRMWARE_VERSION "v1.10.0"
+#define FIRMWARE_VERSION "v1.13.0"
 #endif
 
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
@@ -106,14 +106,21 @@ protected:
   float getAirtimeBudgetFactor() const override;
   int getInterferenceThreshold() const override;
   int calcRxDelay(float score, uint32_t air_time) const override;
+  uint32_t getRetransmitDelay(const mesh::Packet *packet) override;
+  uint32_t getDirectRetransmitDelay(const mesh::Packet *packet) override;
   uint8_t getExtraAckTransmitCount() const override;
   bool filterRecvFloodPacket(mesh::Packet* packet) override;
+  bool allowPacketForward(const mesh::Packet* packet) override;
 
   void sendFloodScoped(const ContactInfo& recipient, mesh::Packet* pkt, uint32_t delay_millis=0) override;
   void sendFloodScoped(const mesh::GroupChannel& channel, mesh::Packet* pkt, uint32_t delay_millis=0) override;
 
   void logRxRaw(float snr, float rssi, const uint8_t raw[], int len) override;
   bool isAutoAddEnabled() const override;
+  bool shouldAutoAddContactType(uint8_t type) const override;
+  bool shouldOverwriteWhenFull() const override;
+  void onContactsFull() override;
+  void onContactOverwrite(const uint8_t* pub_key) override;
   bool onContactPathRecv(ContactInfo& from, uint8_t* in_path, uint8_t in_path_len, uint8_t* out_path, uint8_t out_path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len) override;
   void onDiscoveredContact(ContactInfo &contact, bool is_new, uint8_t path_len, const uint8_t* path) override;
   void onContactPathUpdated(const ContactInfo &contact) override;
@@ -152,6 +159,9 @@ protected:
     pending_login = pending_status = pending_telemetry = pending_discovery = pending_req = 0;
   }
 
+public:
+  void savePrefs() { _store->savePrefs(_prefs, sensors.node_lat, sensors.node_lon); }
+
 private:
   void writeOKFrame();
   void writeErrFrame(uint8_t err_code);
@@ -169,13 +179,12 @@ private:
 
   void checkCLIRescueCmd();
   void checkSerialInterface();
+  bool isValidClientRepeatFreq(uint32_t f) const;
 
   // helpers, short-cuts
-  void savePrefs() { _store->savePrefs(_prefs, sensors.node_lat, sensors.node_lon); }
   void saveChannels() { _store->saveChannels(this); }
   void saveContacts() { _store->saveContacts(this); }
 
-private:
   DataStore* _store;
   NodePrefs _prefs;
   uint32_t pending_login;

examples/companion_radio/NodePrefs.h

@@ -17,11 +17,17 @@ struct NodePrefs {  // persisted to file
   uint8_t multi_acks;
   uint8_t manual_add_contacts;
   float bw;
-  uint8_t tx_power_dbm;
+  int8_t tx_power_dbm;
   uint8_t telemetry_mode_base;
   uint8_t telemetry_mode_loc;
   uint8_t telemetry_mode_env;
   float rx_delay_base;
   uint32_t ble_pin;
   uint8_t  advert_loc_policy;
+  uint8_t  buzzer_quiet;
+  uint8_t  gps_enabled;      // GPS enabled flag (0=disabled, 1=enabled)
+  uint32_t gps_interval;     // GPS read interval in seconds
+  uint8_t autoadd_config;    // bitmask for auto-add contacts config
+  uint8_t client_repeat;
+  uint8_t path_hash_mode;    // which path mode to use when sending
 };

examples/companion_radio/main.cpp

@@ -151,9 +151,7 @@ void setup() {
   );
 
 #ifdef BLE_PIN_CODE
-  char dev_name[32+16];
-  sprintf(dev_name, "%s%s", BLE_NAME_PREFIX, the_mesh.getNodeName());
-  serial_interface.begin(dev_name, the_mesh.getBLEPin());
+  serial_interface.begin(BLE_NAME_PREFIX, the_mesh.getNodePrefs()->node_name, the_mesh.getBLEPin());
 #else
   serial_interface.begin(Serial);
 #endif
@@ -196,12 +194,11 @@ void setup() {
   );
 
 #ifdef WIFI_SSID
+  board.setInhibitSleep(true);   // prevent sleep when WiFi is active
   WiFi.begin(WIFI_SSID, WIFI_PWD);
   serial_interface.begin(TCP_PORT);
 #elif defined(BLE_PIN_CODE)
-  char dev_name[32+16];
-  sprintf(dev_name, "%s%s", BLE_NAME_PREFIX, the_mesh.getNodeName());
-  serial_interface.begin(dev_name, the_mesh.getBLEPin());
+  serial_interface.begin(BLE_NAME_PREFIX, the_mesh.getNodePrefs()->node_name, the_mesh.getBLEPin());
 #elif defined(SERIAL_RX)
   companion_serial.setPins(SERIAL_RX, SERIAL_TX);
   companion_serial.begin(115200);

examples/companion_radio/ui-new/UITask.cpp

@@ -2,6 +2,9 @@
 #include <helpers/TxtDataHelpers.h>
 #include "../MyMesh.h"
 #include "target.h"
+#ifdef WIFI_SSID
+  #include <WiFi.h>
+#endif
 
 #ifndef AUTO_OFF_MILLIS
   #define AUTO_OFF_MILLIS     15000   // 15 seconds
@@ -100,8 +103,14 @@ class HomeScreen : public UIScreen {
 
   void renderBatteryIndicator(DisplayDriver& display, uint16_t batteryMilliVolts) {
     // Convert millivolts to percentage
-    const int minMilliVolts = 3000; // Minimum voltage (e.g., 3.0V)
-    const int maxMilliVolts = 4200; // Maximum voltage (e.g., 4.2V)
+#ifndef BATT_MIN_MILLIVOLTS
+  #define BATT_MIN_MILLIVOLTS 3000
+#endif
+#ifndef BATT_MAX_MILLIVOLTS
+  #define BATT_MAX_MILLIVOLTS 4200
+#endif
+    const int minMilliVolts = BATT_MIN_MILLIVOLTS;
+    const int maxMilliVolts = BATT_MAX_MILLIVOLTS;
     int batteryPercentage = ((batteryMilliVolts - minMilliVolts) * 100) / (maxMilliVolts - minMilliVolts);
     if (batteryPercentage < 0) batteryPercentage = 0; // Clamp to 0%
     if (batteryPercentage > 100) batteryPercentage = 100; // Clamp to 100%
@@ -122,6 +131,14 @@ class HomeScreen : public UIScreen {
     // fill the battery based on the percentage
     int fillWidth = (batteryPercentage * (iconWidth - 4)) / 100;
     display.fillRect(iconX + 2, iconY + 2, fillWidth, iconHeight - 4);
+
+    // show muted icon if buzzer is muted
+#ifdef PIN_BUZZER
+    if (_task->isBuzzerQuiet()) {
+      display.setColor(DisplayDriver::RED);
+      display.drawXbm(iconX - 9, iconY + 1, muted_icon, 8, 8);
+    }
+#endif
   }
 
   CayenneLPP sensors_lpp;
@@ -129,7 +146,7 @@ class HomeScreen : public UIScreen {
   bool sensors_scroll = false;
   int sensors_scroll_offset = 0;
   int next_sensors_refresh = 0;
-
+  
   void refresh_sensors() {
     if (millis() > next_sensors_refresh) {
       sensors_lpp.reset();
@@ -192,10 +209,17 @@ public:
       sprintf(tmp, "MSG: %d", _task->getMsgCount());
       display.drawTextCentered(display.width() / 2, 20, tmp);
 
+      #ifdef WIFI_SSID
+        IPAddress ip = WiFi.localIP();
+        snprintf(tmp, sizeof(tmp), "IP: %d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
+        display.setTextSize(1);
+        display.drawTextCentered(display.width() / 2, 54, tmp); 
+      #endif
       if (_task->hasConnection()) {
         display.setColor(DisplayDriver::GREEN);
         display.setTextSize(1);
         display.drawTextCentered(display.width() / 2, 43, "< Connected >");
+
       } else if (the_mesh.getBLEPin() != 0) { // BT pin
         display.setColor(DisplayDriver::RED);
         display.setTextSize(2);
@@ -260,13 +284,24 @@ public:
 #if ENV_INCLUDE_GPS == 1
     } else if (_page == HomePage::GPS) {
       LocationProvider* nmea = sensors.getLocationProvider();
+      char buf[50];
       int y = 18;
-      display.drawTextLeftAlign(0, y, _task->getGPSState() ? "gps on" : "gps off");
+      bool gps_state = _task->getGPSState();
+#ifdef PIN_GPS_SWITCH
+      bool hw_gps_state = digitalRead(PIN_GPS_SWITCH);
+      if (gps_state != hw_gps_state) {
+        strcpy(buf, gps_state ? "gps off(hw)" : "gps off(sw)");
+      } else {
+        strcpy(buf, gps_state ? "gps on" : "gps off");
+      }
+#else
+      strcpy(buf, gps_state ? "gps on" : "gps off");
+#endif
+      display.drawTextLeftAlign(0, y, buf);
       if (nmea == NULL) {
         y = y + 12;
         display.drawTextLeftAlign(0, y, "Can't access GPS");
       } else {
-        char buf[50];
         strcpy(buf, nmea->isValid()?"fix":"no fix");
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
@@ -431,15 +466,17 @@ class MsgPreviewScreen : public UIScreen {
   };
   #define MAX_UNREAD_MSGS   32
   int num_unread;
+  int head = MAX_UNREAD_MSGS - 1; // index of latest unread message
   MsgEntry unread[MAX_UNREAD_MSGS];
 
 public:
   MsgPreviewScreen(UITask* task, mesh::RTCClock* rtc) : _task(task), _rtc(rtc) { num_unread = 0; }
 
   void addPreview(uint8_t path_len, const char* from_name, const char* msg) {
-    if (num_unread >= MAX_UNREAD_MSGS) return;  // full
+    head = (head + 1) % MAX_UNREAD_MSGS;
+    if (num_unread < MAX_UNREAD_MSGS) num_unread++;
 
-    auto p = &unread[num_unread++];
+    auto p = &unread[head];
     p->timestamp = _rtc->getCurrentTime();
     if (path_len == 0xFF) {
       sprintf(p->origin, "(D) %s:", from_name);
@@ -457,7 +494,7 @@ public:
     sprintf(tmp, "Unread: %d", num_unread);
     display.print(tmp);
 
-    auto p = &unread[0];
+    auto p = &unread[head];
 
     int secs = _rtc->getCurrentTime() - p->timestamp;
     if (secs < 60) {
@@ -493,14 +530,10 @@ public:
 
   bool handleInput(char c) override {
     if (c == KEY_NEXT || c == KEY_RIGHT) {
+      head = (head + MAX_UNREAD_MSGS - 1) % MAX_UNREAD_MSGS;
       num_unread--;
       if (num_unread == 0) {
         _task->gotoHomeScreen();
-      } else {
-        // delete first/curr item from unread queue
-        for (int i = 0; i < num_unread; i++) {
-          unread[i] = unread[i + 1];
-        }
       }
       return true;
     }
@@ -526,12 +559,26 @@ void UITask::begin(DisplayDriver* display, SensorManager* sensors, NodePrefs* no
 #endif
 
   _node_prefs = node_prefs;
+
+#if ENV_INCLUDE_GPS == 1
+  // Apply GPS preferences from stored prefs
+  if (_sensors != NULL && _node_prefs != NULL) {
+    _sensors->setSettingValue("gps", _node_prefs->gps_enabled ? "1" : "0");
+    if (_node_prefs->gps_interval > 0) {
+      char interval_str[12];  // Max: 24 hours = 86400 seconds (5 digits + null)
+      sprintf(interval_str, "%u", _node_prefs->gps_interval);
+      _sensors->setSettingValue("gps_interval", interval_str);
+    }
+  }
+#endif
+
   if (_display != NULL) {
     _display->turnOn();
   }
 
 #ifdef PIN_BUZZER
   buzzer.begin();
+  buzzer.quiet(_node_prefs->buzzer_quiet);
 #endif
 
 #ifdef PIN_VIBRATION
@@ -596,9 +643,13 @@ void UITask::newMsg(uint8_t path_len, const char* from_name, const char* text, i
   setCurrScreen(msg_preview);
 
   if (_display != NULL) {
-    if (!_display->isOn()) _display->turnOn();
+    if (!_display->isOn() && !hasConnection()) {
+      _display->turnOn();
+    }
+    if (_display->isOn()) {
     _auto_off = millis() + AUTO_OFF_MILLIS;  // extend the auto-off timer
     _next_refresh = 100;  // trigger refresh
+    }
   }
 }
 
@@ -618,7 +669,7 @@ void UITask::userLedHandler() {
       led_state = 0;
       next_led_change = cur_time + LED_CYCLE_MILLIS - last_led_increment;
     }
-    digitalWrite(PIN_STATUS_LED, led_state);
+    digitalWrite(PIN_STATUS_LED, led_state == LED_STATE_ON);
   }
 #endif
 }
@@ -650,6 +701,7 @@ void UITask::shutdown(bool restart){
     _board->reboot();
   } else {
     _display->turnOff();
+    radio_driver.powerOff();
     _board->powerOff();
   }
 }
@@ -714,10 +766,14 @@ void UITask::loop() {
     _analogue_pin_read_millis = millis();
   }
 #endif
-#if defined(DISP_BACKLIGHT) && defined(BACKLIGHT_BTN)
+#if defined(BACKLIGHT_BTN)
   if (millis() > next_backlight_btn_check) {
     bool touch_state = digitalRead(PIN_BUTTON2);
+#if defined(DISP_BACKLIGHT)
     digitalWrite(DISP_BACKLIGHT, !touch_state);
+#elif defined(EXP_PIN_BACKLIGHT)
+    expander.digitalWrite(EXP_PIN_BACKLIGHT, !touch_state);
+#endif
     next_backlight_btn_check = millis() + 300;
   }
 #endif
@@ -846,13 +902,15 @@ void UITask::toggleGPS() {
       if (strcmp(_sensors->getSettingName(i), "gps") == 0) {
         if (strcmp(_sensors->getSettingValue(i), "1") == 0) {
           _sensors->setSettingValue("gps", "0");
+          _node_prefs->gps_enabled = 0;
           notify(UIEventType::ack);
-          showAlert("GPS: Disabled", 800);
         } else {
           _sensors->setSettingValue("gps", "1");
+          _node_prefs->gps_enabled = 1;
           notify(UIEventType::ack);
-          showAlert("GPS: Enabled", 800);
         }
+        the_mesh.savePrefs();
+        showAlert(_node_prefs->gps_enabled ? "GPS: Enabled" : "GPS: Disabled", 800);
         _next_refresh = 0;
         break;
       }
@@ -866,11 +924,12 @@ void UITask::toggleBuzzer() {
     if (buzzer.isQuiet()) {
       buzzer.quiet(false);
       notify(UIEventType::ack);
-      showAlert("Buzzer: ON", 800);
     } else {
       buzzer.quiet(true);
-      showAlert("Buzzer: OFF", 800);
     }
+    _node_prefs->buzzer_quiet = buzzer.isQuiet();
+    the_mesh.savePrefs();
+    showAlert(buzzer.isQuiet() ? "Buzzer: OFF" : "Buzzer: ON", 800);
     _next_refresh = 0;  // trigger refresh
   #endif
 }

examples/companion_radio/ui-new/UITask.h

@@ -8,6 +8,10 @@
 #include <Arduino.h>
 #include <helpers/sensors/LPPDataHelpers.h>
 
+#ifndef LED_STATE_ON
+  #define LED_STATE_ON 1
+#endif
+
 #ifdef PIN_BUZZER
   #include <helpers/ui/buzzer.h>
 #endif
@@ -50,7 +54,7 @@ class UITask : public AbstractUITask {
   UIScreen* curr;
 
   void userLedHandler();
-  
+
   // Button action handlers
   char checkDisplayOn(char c);
   char handleLongPress(char c);
@@ -74,6 +78,14 @@ public:
   bool hasDisplay() const { return _display != NULL; }
   bool isButtonPressed() const;
 
+  bool isBuzzerQuiet() { 
+#ifdef PIN_BUZZER
+    return buzzer.isQuiet();
+#else
+    return true;
+#endif
+  }
+
   void toggleBuzzer();
   bool getGPSState();
   void toggleGPS();

examples/companion_radio/ui-new/icons.h

@@ -115,4 +115,8 @@ static const uint8_t advert_icon[] = {
 0x38, 0x00, 0x00, 0x1C, 0x18, 0x00, 0x00, 0x18, 0x0C, 0x00, 0x00, 0x30,
 0x04, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static const uint8_t muted_icon[] = {
+  0x20, 0x6a, 0xea, 0xe4, 0xe4, 0xea, 0x6a, 0x20
 };

examples/companion_radio/ui-orig/UITask.cpp

@@ -56,6 +56,7 @@ void UITask::begin(DisplayDriver* display, SensorManager* sensors, NodePrefs* no
 
 #ifdef PIN_BUZZER
   buzzer.begin();
+  buzzer.quiet(_node_prefs->buzzer_quiet);
 #endif
 
   // Initialize digital button if available
@@ -136,16 +137,26 @@ void UITask::newMsg(uint8_t path_len, const char* from_name, const char* text, i
   StrHelper::strncpy(_msg, text, sizeof(_msg));
 
   if (_display != NULL) {
-    if (!_display->isOn()) _display->turnOn();
+    if (!_display->isOn() && !hasConnection()) {
+      _display->turnOn();
+    }
+    if (_display->isOn()) {
     _auto_off = millis() + AUTO_OFF_MILLIS;  // extend the auto-off timer
     _need_refresh = true;
+    }
   }
 }
 
 void UITask::renderBatteryIndicator(uint16_t batteryMilliVolts) {
   // Convert millivolts to percentage
-  const int minMilliVolts = 3000; // Minimum voltage (e.g., 3.0V)
-  const int maxMilliVolts = 4200; // Maximum voltage (e.g., 4.2V)
+#ifndef BATT_MIN_MILLIVOLTS
+  #define BATT_MIN_MILLIVOLTS 3000
+#endif
+#ifndef BATT_MAX_MILLIVOLTS
+  #define BATT_MAX_MILLIVOLTS 4200
+#endif
+  const int minMilliVolts = BATT_MIN_MILLIVOLTS;
+  const int maxMilliVolts = BATT_MAX_MILLIVOLTS;
   int batteryPercentage = ((batteryMilliVolts - minMilliVolts) * 100) / (maxMilliVolts - minMilliVolts);
   if (batteryPercentage < 0) batteryPercentage = 0; // Clamp to 0%
   if (batteryPercentage > 100) batteryPercentage = 100; // Clamp to 100%
@@ -269,7 +280,7 @@ void UITask::userLedHandler() {
       state = 0;
       next_change = cur_time + LED_CYCLE_MILLIS - last_increment;
     }
-    digitalWrite(PIN_STATUS_LED, state);
+    digitalWrite(PIN_STATUS_LED, state == LED_STATE_ON);
   }
 #endif
 }
@@ -292,10 +303,12 @@ void UITask::shutdown(bool restart){
 
   #endif // PIN_BUZZER
 
-  if (restart)
+  if (restart) {
     _board->reboot();
-  else
+  } else {
+    radio_driver.powerOff();
     _board->powerOff();
+  }
 }
 
 void UITask::loop() {
@@ -394,6 +407,8 @@ void UITask::handleButtonTriplePress() {
       buzzer.quiet(true);
       sprintf(_alert, "Buzzer: OFF");
     }
+    _node_prefs->buzzer_quiet = buzzer.isQuiet();
+    the_mesh.savePrefs();
     _need_refresh = true;
   #endif
 }

examples/kiss_modem/KissModem.cpp

@@ -0,0 +1,581 @@
+#include "KissModem.h"
+#include <CayenneLPP.h>
+
+KissModem::KissModem(Stream& serial, mesh::LocalIdentity& identity, mesh::RNG& rng,
+                     mesh::Radio& radio, mesh::MainBoard& board, SensorManager& sensors)
+  : _serial(serial), _identity(identity), _rng(rng), _radio(radio), _board(board), _sensors(sensors) {
+  _rx_len = 0;
+  _rx_escaped = false;
+  _rx_active = false;
+  _has_pending_tx = false;
+  _pending_tx_len = 0;
+  _txdelay = KISS_DEFAULT_TXDELAY;
+  _persistence = KISS_DEFAULT_PERSISTENCE;
+  _slottime = KISS_DEFAULT_SLOTTIME;
+  _txtail = 0;
+  _fullduplex = 0;
+  _tx_state = TX_IDLE;
+  _tx_timer = 0;
+  _setRadioCallback = nullptr;
+  _setTxPowerCallback = nullptr;
+  _getCurrentRssiCallback = nullptr;
+  _getStatsCallback = nullptr;
+  _config = {0, 0, 0, 0, 0};
+  _signal_report_enabled = true;
+}
+
+void KissModem::begin() {
+  _rx_len = 0;
+  _rx_escaped = false;
+  _rx_active = false;
+  _has_pending_tx = false;
+  _tx_state = TX_IDLE;
+}
+
+void KissModem::writeByte(uint8_t b) {
+  if (b == KISS_FEND) {
+    _serial.write(KISS_FESC);
+    _serial.write(KISS_TFEND);
+  } else if (b == KISS_FESC) {
+    _serial.write(KISS_FESC);
+    _serial.write(KISS_TFESC);
+  } else {
+    _serial.write(b);
+  }
+}
+
+void KissModem::writeFrame(uint8_t type, const uint8_t* data, uint16_t len) {
+  _serial.write(KISS_FEND);
+  writeByte(type);
+  for (uint16_t i = 0; i < len; i++) {
+    writeByte(data[i]);
+  }
+  _serial.write(KISS_FEND);
+}
+
+void KissModem::writeHardwareFrame(uint8_t sub_cmd, const uint8_t* data, uint16_t len) {
+  _serial.write(KISS_FEND);
+  writeByte(KISS_CMD_SETHARDWARE);
+  writeByte(sub_cmd);
+  for (uint16_t i = 0; i < len; i++) {
+    writeByte(data[i]);
+  }
+  _serial.write(KISS_FEND);
+}
+
+void KissModem::writeHardwareError(uint8_t error_code) {
+  writeHardwareFrame(HW_RESP_ERROR, &error_code, 1);
+}
+
+void KissModem::loop() {
+  while (_serial.available()) {
+    uint8_t b = _serial.read();
+
+    if (b == KISS_FEND) {
+      if (_rx_active && _rx_len > 0) {
+        processFrame();
+      }
+      _rx_len = 0;
+      _rx_escaped = false;
+      _rx_active = true;
+      continue;
+    }
+
+    if (!_rx_active) continue;
+
+    if (b == KISS_FESC) {
+      _rx_escaped = true;
+      continue;
+    }
+
+    if (_rx_escaped) {
+      _rx_escaped = false;
+      if (b == KISS_TFEND) b = KISS_FEND;
+      else if (b == KISS_TFESC) b = KISS_FESC;
+      else continue;
+    }
+
+    if (_rx_len < KISS_MAX_FRAME_SIZE) {
+      _rx_buf[_rx_len++] = b;
+    } else {
+      /* Buffer full with no FEND; reset so we don't stay stuck ignoring input. */
+      _rx_len = 0;
+      _rx_escaped = false;
+      _rx_active = false;
+    }
+  }
+
+  processTx();
+}
+
+void KissModem::processFrame() {
+  if (_rx_len < 1) return;
+
+  uint8_t type_byte = _rx_buf[0];
+
+  if (type_byte == KISS_CMD_RETURN) return;
+
+  uint8_t port = (type_byte >> 4) & 0x0F;
+  uint8_t cmd = type_byte & 0x0F;
+
+  if (port != 0) return;
+
+  const uint8_t* data = &_rx_buf[1];
+  uint16_t data_len = _rx_len - 1;
+
+  switch (cmd) {
+    case KISS_CMD_DATA:
+      if (data_len > 0 && data_len <= KISS_MAX_PACKET_SIZE && !_has_pending_tx) {
+        memcpy(_pending_tx, data, data_len);
+        _pending_tx_len = data_len;
+        _has_pending_tx = true;
+      }
+      break;
+
+    case KISS_CMD_TXDELAY:
+      if (data_len >= 1) _txdelay = data[0];
+      break;
+
+    case KISS_CMD_PERSISTENCE:
+      if (data_len >= 1) _persistence = data[0];
+      break;
+
+    case KISS_CMD_SLOTTIME:
+      if (data_len >= 1) _slottime = data[0];
+      break;
+
+    case KISS_CMD_TXTAIL:
+      if (data_len >= 1) _txtail = data[0];
+      break;
+
+    case KISS_CMD_FULLDUPLEX:
+      if (data_len >= 1) _fullduplex = data[0];
+      break;
+
+    case KISS_CMD_SETHARDWARE:
+      if (data_len >= 1) {
+        handleHardwareCommand(data[0], data + 1, data_len - 1);
+      }
+      break;
+
+    default:
+      break;
+  }
+}
+
+void KissModem::handleHardwareCommand(uint8_t sub_cmd, const uint8_t* data, uint16_t len) {
+  switch (sub_cmd) {
+    case HW_CMD_GET_IDENTITY:
+      handleGetIdentity();
+      break;
+    case HW_CMD_GET_RANDOM:
+      handleGetRandom(data, len);
+      break;
+    case HW_CMD_VERIFY_SIGNATURE:
+      handleVerifySignature(data, len);
+      break;
+    case HW_CMD_SIGN_DATA:
+      handleSignData(data, len);
+      break;
+    case HW_CMD_ENCRYPT_DATA:
+      handleEncryptData(data, len);
+      break;
+    case HW_CMD_DECRYPT_DATA:
+      handleDecryptData(data, len);
+      break;
+    case HW_CMD_KEY_EXCHANGE:
+      handleKeyExchange(data, len);
+      break;
+    case HW_CMD_HASH:
+      handleHash(data, len);
+      break;
+    case HW_CMD_SET_RADIO:
+      handleSetRadio(data, len);
+      break;
+    case HW_CMD_SET_TX_POWER:
+      handleSetTxPower(data, len);
+      break;
+    case HW_CMD_GET_RADIO:
+      handleGetRadio();
+      break;
+    case HW_CMD_GET_TX_POWER:
+      handleGetTxPower();
+      break;
+    case HW_CMD_GET_VERSION:
+      handleGetVersion();
+      break;
+    case HW_CMD_GET_CURRENT_RSSI:
+      handleGetCurrentRssi();
+      break;
+    case HW_CMD_IS_CHANNEL_BUSY:
+      handleIsChannelBusy();
+      break;
+    case HW_CMD_GET_AIRTIME:
+      handleGetAirtime(data, len);
+      break;
+    case HW_CMD_GET_NOISE_FLOOR:
+      handleGetNoiseFloor();
+      break;
+    case HW_CMD_GET_STATS:
+      handleGetStats();
+      break;
+    case HW_CMD_GET_BATTERY:
+      handleGetBattery();
+      break;
+    case HW_CMD_PING:
+      handlePing();
+      break;
+    case HW_CMD_GET_SENSORS:
+      handleGetSensors(data, len);
+      break;
+    case HW_CMD_GET_MCU_TEMP:
+      handleGetMCUTemp();
+      break;
+    case HW_CMD_REBOOT:
+      handleReboot();
+      break;
+    case HW_CMD_GET_DEVICE_NAME:
+      handleGetDeviceName();
+      break;
+    case HW_CMD_SET_SIGNAL_REPORT:
+      handleSetSignalReport(data, len);
+      break;
+    case HW_CMD_GET_SIGNAL_REPORT:
+      handleGetSignalReport();
+      break;
+    default:
+      writeHardwareError(HW_ERR_UNKNOWN_CMD);
+      break;
+  }
+}
+
+void KissModem::processTx() {
+  switch (_tx_state) {
+    case TX_IDLE:
+      if (_has_pending_tx) {
+        if (_fullduplex) {
+          _tx_timer = millis();
+          _tx_state = TX_DELAY;
+        } else {
+          _tx_state = TX_WAIT_CLEAR;
+        }
+      }
+      break;
+
+    case TX_WAIT_CLEAR:
+      if (!_radio.isReceiving()) {
+        uint8_t rand_val;
+        _rng.random(&rand_val, 1);
+        if (rand_val <= _persistence) {
+          _tx_timer = millis();
+          _tx_state = TX_DELAY;
+        } else {
+          _tx_timer = millis();
+          _tx_state = TX_SLOT_WAIT;
+        }
+      }
+      break;
+
+    case TX_SLOT_WAIT:
+      if (millis() - _tx_timer >= (uint32_t)_slottime * 10) {
+        _tx_state = TX_WAIT_CLEAR;
+      }
+      break;
+
+    case TX_DELAY:
+      if (millis() - _tx_timer >= (uint32_t)_txdelay * 10) {
+        _radio.startSendRaw(_pending_tx, _pending_tx_len);
+        _tx_state = TX_SENDING;
+      }
+      break;
+
+    case TX_SENDING:
+      if (_radio.isSendComplete()) {
+        _radio.onSendFinished();
+        uint8_t result = 0x01;
+        writeHardwareFrame(HW_RESP_TX_DONE, &result, 1);
+        _has_pending_tx = false;
+        _tx_state = TX_IDLE;
+      }
+      break;
+  }
+}
+
+void KissModem::onPacketReceived(int8_t snr, int8_t rssi, const uint8_t* packet, uint16_t len) {
+  writeFrame(KISS_CMD_DATA, packet, len);
+  if (_signal_report_enabled) {
+    uint8_t meta[2] = { (uint8_t)snr, (uint8_t)rssi };
+    writeHardwareFrame(HW_RESP_RX_META, meta, 2);
+  }
+}
+
+void KissModem::handleGetIdentity() {
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_IDENTITY), _identity.pub_key, PUB_KEY_SIZE);
+}
+
+void KissModem::handleGetRandom(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  uint8_t requested = data[0];
+  if (requested < 1 || requested > 64) {
+    writeHardwareError(HW_ERR_INVALID_PARAM);
+    return;
+  }
+
+  uint8_t buf[64];
+  _rng.random(buf, requested);
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_RANDOM), buf, requested);
+}
+
+void KissModem::handleVerifySignature(const uint8_t* data, uint16_t len) {
+  if (len < PUB_KEY_SIZE + SIGNATURE_SIZE + 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  mesh::Identity signer(data);
+  const uint8_t* signature = data + PUB_KEY_SIZE;
+  const uint8_t* msg = data + PUB_KEY_SIZE + SIGNATURE_SIZE;
+  uint16_t msg_len = len - PUB_KEY_SIZE - SIGNATURE_SIZE;
+
+  uint8_t result = signer.verify(signature, msg, msg_len) ? 0x01 : 0x00;
+  writeHardwareFrame(HW_RESP(HW_CMD_VERIFY_SIGNATURE), &result, 1);
+}
+
+void KissModem::handleSignData(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  uint8_t signature[SIGNATURE_SIZE];
+  _identity.sign(signature, data, len);
+  writeHardwareFrame(HW_RESP(HW_CMD_SIGN_DATA), signature, SIGNATURE_SIZE);
+}
+
+void KissModem::handleEncryptData(const uint8_t* data, uint16_t len) {
+  if (len < PUB_KEY_SIZE + 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  const uint8_t* key = data;
+  const uint8_t* plaintext = data + PUB_KEY_SIZE;
+  uint16_t plaintext_len = len - PUB_KEY_SIZE;
+
+  uint8_t buf[KISS_MAX_FRAME_SIZE];
+  int encrypted_len = mesh::Utils::encryptThenMAC(key, buf, plaintext, plaintext_len);
+
+  if (encrypted_len > 0) {
+    writeHardwareFrame(HW_RESP(HW_CMD_ENCRYPT_DATA), buf, encrypted_len);
+  } else {
+    writeHardwareError(HW_ERR_ENCRYPT_FAILED);
+  }
+}
+
+void KissModem::handleDecryptData(const uint8_t* data, uint16_t len) {
+  if (len < PUB_KEY_SIZE + CIPHER_MAC_SIZE + 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  const uint8_t* key = data;
+  const uint8_t* ciphertext = data + PUB_KEY_SIZE;
+  uint16_t ciphertext_len = len - PUB_KEY_SIZE;
+
+  uint8_t buf[KISS_MAX_FRAME_SIZE];
+  int decrypted_len = mesh::Utils::MACThenDecrypt(key, buf, ciphertext, ciphertext_len);
+
+  if (decrypted_len > 0) {
+    writeHardwareFrame(HW_RESP(HW_CMD_DECRYPT_DATA), buf, decrypted_len);
+  } else {
+    writeHardwareError(HW_ERR_MAC_FAILED);
+  }
+}
+
+void KissModem::handleKeyExchange(const uint8_t* data, uint16_t len) {
+  if (len < PUB_KEY_SIZE) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  uint8_t shared_secret[PUB_KEY_SIZE];
+  _identity.calcSharedSecret(shared_secret, data);
+  writeHardwareFrame(HW_RESP(HW_CMD_KEY_EXCHANGE), shared_secret, PUB_KEY_SIZE);
+}
+
+void KissModem::handleHash(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  uint8_t hash[32];
+  mesh::Utils::sha256(hash, 32, data, len);
+  writeHardwareFrame(HW_RESP(HW_CMD_HASH), hash, 32);
+}
+
+void KissModem::handleSetRadio(const uint8_t* data, uint16_t len) {
+  if (len < 10) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+  if (!_setRadioCallback) {
+    writeHardwareError(HW_ERR_NO_CALLBACK);
+    return;
+  }
+
+  memcpy(&_config.freq_hz, data, 4);
+  memcpy(&_config.bw_hz, data + 4, 4);
+  _config.sf = data[8];
+  _config.cr = data[9];
+
+  _setRadioCallback(_config.freq_hz / 1000000.0f, _config.bw_hz / 1000.0f, _config.sf, _config.cr);
+  writeHardwareFrame(HW_RESP_OK, nullptr, 0);
+}
+
+void KissModem::handleSetTxPower(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+  if (!_setTxPowerCallback) {
+    writeHardwareError(HW_ERR_NO_CALLBACK);
+    return;
+  }
+
+  _config.tx_power = data[0];
+  _setTxPowerCallback(data[0]);
+  writeHardwareFrame(HW_RESP_OK, nullptr, 0);
+}
+
+void KissModem::handleGetRadio() {
+  uint8_t buf[10];
+  memcpy(buf, &_config.freq_hz, 4);
+  memcpy(buf + 4, &_config.bw_hz, 4);
+  buf[8] = _config.sf;
+  buf[9] = _config.cr;
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_RADIO), buf, 10);
+}
+
+void KissModem::handleGetTxPower() {
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_TX_POWER), &_config.tx_power, 1);
+}
+
+void KissModem::handleGetVersion() {
+  uint8_t buf[2];
+  buf[0] = KISS_FIRMWARE_VERSION;
+  buf[1] = 0;
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_VERSION), buf, 2);
+}
+
+void KissModem::handleGetCurrentRssi() {
+  if (!_getCurrentRssiCallback) {
+    writeHardwareError(HW_ERR_NO_CALLBACK);
+    return;
+  }
+
+  float rssi = _getCurrentRssiCallback();
+  int8_t rssi_byte = (int8_t)rssi;
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_CURRENT_RSSI), (uint8_t*)&rssi_byte, 1);
+}
+
+void KissModem::handleIsChannelBusy() {
+  uint8_t busy = _radio.isReceiving() ? 0x01 : 0x00;
+  writeHardwareFrame(HW_RESP(HW_CMD_IS_CHANNEL_BUSY), &busy, 1);
+}
+
+void KissModem::handleGetAirtime(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  uint8_t packet_len = data[0];
+  uint32_t airtime = _radio.getEstAirtimeFor(packet_len);
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_AIRTIME), (uint8_t*)&airtime, 4);
+}
+
+void KissModem::handleGetNoiseFloor() {
+  int16_t noise_floor = _radio.getNoiseFloor();
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_NOISE_FLOOR), (uint8_t*)&noise_floor, 2);
+}
+
+void KissModem::handleGetStats() {
+  if (!_getStatsCallback) {
+    writeHardwareError(HW_ERR_NO_CALLBACK);
+    return;
+  }
+
+  uint32_t rx, tx, errors;
+  _getStatsCallback(&rx, &tx, &errors);
+  uint8_t buf[12];
+  memcpy(buf, &rx, 4);
+  memcpy(buf + 4, &tx, 4);
+  memcpy(buf + 8, &errors, 4);
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_STATS), buf, 12);
+}
+
+void KissModem::handleGetBattery() {
+  uint16_t mv = _board.getBattMilliVolts();
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_BATTERY), (uint8_t*)&mv, 2);
+}
+
+void KissModem::handlePing() {
+  writeHardwareFrame(HW_RESP(HW_CMD_PING), nullptr, 0);
+}
+
+void KissModem::handleGetSensors(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+
+  uint8_t permissions = data[0];
+  CayenneLPP telemetry(255);
+  if (_sensors.querySensors(permissions, telemetry)) {
+    writeHardwareFrame(HW_RESP(HW_CMD_GET_SENSORS), telemetry.getBuffer(), telemetry.getSize());
+  } else {
+    writeHardwareFrame(HW_RESP(HW_CMD_GET_SENSORS), nullptr, 0);
+  }
+}
+
+void KissModem::handleGetMCUTemp() {
+  float temp = _board.getMCUTemperature();
+  if (isnan(temp)) {
+    writeHardwareError(HW_ERR_NO_CALLBACK);
+    return;
+  }
+  int16_t temp_tenths = (int16_t)(temp * 10.0f);
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_MCU_TEMP), (uint8_t*)&temp_tenths, 2);
+}
+
+void KissModem::handleReboot() {
+  writeHardwareFrame(HW_RESP_OK, nullptr, 0);
+  _serial.flush();
+  delay(50);
+  _board.reboot();
+}
+
+void KissModem::handleGetDeviceName() {
+  const char* name = _board.getManufacturerName();
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_DEVICE_NAME), (const uint8_t*)name, strlen(name));
+}
+
+void KissModem::handleSetSignalReport(const uint8_t* data, uint16_t len) {
+  if (len < 1) {
+    writeHardwareError(HW_ERR_INVALID_LENGTH);
+    return;
+  }
+  _signal_report_enabled = (data[0] != 0x00);
+  uint8_t val = _signal_report_enabled ? 0x01 : 0x00;
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_SIGNAL_REPORT), &val, 1);
+}
+
+void KissModem::handleGetSignalReport() {
+  uint8_t val = _signal_report_enabled ? 0x01 : 0x00;
+  writeHardwareFrame(HW_RESP(HW_CMD_GET_SIGNAL_REPORT), &val, 1);
+}

examples/kiss_modem/KissModem.h

@@ -0,0 +1,183 @@
+#pragma once
+
+#include <Arduino.h>
+#include <Identity.h>
+#include <Utils.h>
+#include <Mesh.h>
+#include <helpers/SensorManager.h>
+
+#define KISS_FEND  0xC0
+#define KISS_FESC  0xDB
+#define KISS_TFEND 0xDC
+#define KISS_TFESC 0xDD
+
+#define KISS_MAX_FRAME_SIZE  512
+#define KISS_MAX_PACKET_SIZE 255
+
+#define KISS_CMD_DATA        0x00
+#define KISS_CMD_TXDELAY     0x01
+#define KISS_CMD_PERSISTENCE 0x02
+#define KISS_CMD_SLOTTIME    0x03
+#define KISS_CMD_TXTAIL      0x04
+#define KISS_CMD_FULLDUPLEX  0x05
+#define KISS_CMD_SETHARDWARE 0x06
+#define KISS_CMD_RETURN      0xFF
+
+#define KISS_DEFAULT_TXDELAY     50
+#define KISS_DEFAULT_PERSISTENCE 63
+#define KISS_DEFAULT_SLOTTIME    10
+
+#define HW_CMD_GET_IDENTITY      0x01
+#define HW_CMD_GET_RANDOM        0x02
+#define HW_CMD_VERIFY_SIGNATURE  0x03
+#define HW_CMD_SIGN_DATA         0x04
+#define HW_CMD_ENCRYPT_DATA      0x05
+#define HW_CMD_DECRYPT_DATA      0x06
+#define HW_CMD_KEY_EXCHANGE      0x07
+#define HW_CMD_HASH              0x08
+#define HW_CMD_SET_RADIO         0x09
+#define HW_CMD_SET_TX_POWER      0x0A
+#define HW_CMD_GET_RADIO         0x0B
+#define HW_CMD_GET_TX_POWER      0x0C
+#define HW_CMD_GET_CURRENT_RSSI  0x0D
+#define HW_CMD_IS_CHANNEL_BUSY   0x0E
+#define HW_CMD_GET_AIRTIME       0x0F
+#define HW_CMD_GET_NOISE_FLOOR   0x10
+#define HW_CMD_GET_VERSION       0x11
+#define HW_CMD_GET_STATS         0x12
+#define HW_CMD_GET_BATTERY       0x13
+#define HW_CMD_GET_MCU_TEMP      0x14
+#define HW_CMD_GET_SENSORS       0x15
+#define HW_CMD_GET_DEVICE_NAME   0x16
+#define HW_CMD_PING              0x17
+#define HW_CMD_REBOOT            0x18
+#define HW_CMD_SET_SIGNAL_REPORT 0x19
+#define HW_CMD_GET_SIGNAL_REPORT 0x1A
+
+/* Response code = command code | 0x80.  Generic / unsolicited use 0xF0+. */
+#define HW_RESP(cmd)             ((cmd) | 0x80)
+
+/* Generic responses (shared by multiple commands) */
+#define HW_RESP_OK               0xF0
+#define HW_RESP_ERROR            0xF1
+
+/* Unsolicited notifications (no corresponding request) */
+#define HW_RESP_TX_DONE          0xF8
+#define HW_RESP_RX_META          0xF9
+
+#define HW_ERR_INVALID_LENGTH    0x01
+#define HW_ERR_INVALID_PARAM     0x02
+#define HW_ERR_NO_CALLBACK       0x03
+#define HW_ERR_MAC_FAILED        0x04
+#define HW_ERR_UNKNOWN_CMD       0x05
+#define HW_ERR_ENCRYPT_FAILED    0x06
+
+#define KISS_FIRMWARE_VERSION 1
+
+typedef void (*SetRadioCallback)(float freq, float bw, uint8_t sf, uint8_t cr);
+typedef void (*SetTxPowerCallback)(uint8_t power);
+typedef float (*GetCurrentRssiCallback)();
+typedef void (*GetStatsCallback)(uint32_t* rx, uint32_t* tx, uint32_t* errors);
+
+struct RadioConfig {
+  uint32_t freq_hz;
+  uint32_t bw_hz;
+  uint8_t sf;
+  uint8_t cr;
+  uint8_t tx_power;
+};
+
+enum TxState {
+  TX_IDLE,
+  TX_WAIT_CLEAR,
+  TX_SLOT_WAIT,
+  TX_DELAY,
+  TX_SENDING
+};
+
+class KissModem {
+  Stream& _serial;
+  mesh::LocalIdentity& _identity;
+  mesh::RNG& _rng;
+  mesh::Radio& _radio;
+  mesh::MainBoard& _board;
+  SensorManager& _sensors;
+
+  uint8_t _rx_buf[KISS_MAX_FRAME_SIZE];
+  uint16_t _rx_len;
+  bool _rx_escaped;
+  bool _rx_active;
+
+  uint8_t _pending_tx[KISS_MAX_PACKET_SIZE];
+  uint16_t _pending_tx_len;
+  bool _has_pending_tx;
+
+  uint8_t _txdelay;
+  uint8_t _persistence;
+  uint8_t _slottime;
+  uint8_t _txtail;
+  uint8_t _fullduplex;
+
+  TxState _tx_state;
+  uint32_t _tx_timer;
+
+  SetRadioCallback _setRadioCallback;
+  SetTxPowerCallback _setTxPowerCallback;
+  GetCurrentRssiCallback _getCurrentRssiCallback;
+  GetStatsCallback _getStatsCallback;
+
+  RadioConfig _config;
+  bool _signal_report_enabled;
+
+  void writeByte(uint8_t b);
+  void writeFrame(uint8_t type, const uint8_t* data, uint16_t len);
+  void writeHardwareFrame(uint8_t sub_cmd, const uint8_t* data, uint16_t len);
+  void writeHardwareError(uint8_t error_code);
+  void processFrame();
+  void handleHardwareCommand(uint8_t sub_cmd, const uint8_t* data, uint16_t len);
+  void processTx();
+
+  void handleGetIdentity();
+  void handleGetRandom(const uint8_t* data, uint16_t len);
+  void handleVerifySignature(const uint8_t* data, uint16_t len);
+  void handleSignData(const uint8_t* data, uint16_t len);
+  void handleEncryptData(const uint8_t* data, uint16_t len);
+  void handleDecryptData(const uint8_t* data, uint16_t len);
+  void handleKeyExchange(const uint8_t* data, uint16_t len);
+  void handleHash(const uint8_t* data, uint16_t len);
+  void handleSetRadio(const uint8_t* data, uint16_t len);
+  void handleSetTxPower(const uint8_t* data, uint16_t len);
+  void handleGetRadio();
+  void handleGetTxPower();
+  void handleGetVersion();
+  void handleGetCurrentRssi();
+  void handleIsChannelBusy();
+  void handleGetAirtime(const uint8_t* data, uint16_t len);
+  void handleGetNoiseFloor();
+  void handleGetStats();
+  void handleGetBattery();
+  void handlePing();
+  void handleGetSensors(const uint8_t* data, uint16_t len);
+  void handleGetMCUTemp();
+  void handleReboot();
+  void handleGetDeviceName();
+  void handleSetSignalReport(const uint8_t* data, uint16_t len);
+  void handleGetSignalReport();
+
+public:
+  KissModem(Stream& serial, mesh::LocalIdentity& identity, mesh::RNG& rng,
+            mesh::Radio& radio, mesh::MainBoard& board, SensorManager& sensors);
+
+  void begin();
+  void loop();
+
+  void setRadioCallback(SetRadioCallback cb) { _setRadioCallback = cb; }
+  void setTxPowerCallback(SetTxPowerCallback cb) { _setTxPowerCallback = cb; }
+  void setGetCurrentRssiCallback(GetCurrentRssiCallback cb) { _getCurrentRssiCallback = cb; }
+  void setGetStatsCallback(GetStatsCallback cb) { _getStatsCallback = cb; }
+
+  void onPacketReceived(int8_t snr, int8_t rssi, const uint8_t* packet, uint16_t len);
+  bool isTxBusy() const { return _tx_state != TX_IDLE; }
+  /** True only when radio is actually transmitting; use to skip recvRaw in main loop. */
+  bool isActuallyTransmitting() const { return _tx_state == TX_SENDING; }
+};

examples/kiss_modem/main.cpp

@@ -0,0 +1,146 @@
+#include <Arduino.h>
+#include <target.h>
+#include <helpers/ArduinoHelpers.h>
+#include <helpers/IdentityStore.h>
+#include "KissModem.h"
+
+#if defined(NRF52_PLATFORM)
+  #include <InternalFileSystem.h>
+#elif defined(RP2040_PLATFORM)
+  #include <LittleFS.h>
+#elif defined(ESP32)
+  #include <SPIFFS.h>
+#endif
+#if defined(KISS_UART_RX) && defined(KISS_UART_TX)
+  #include <HardwareSerial.h>
+#endif
+
+#define NOISE_FLOOR_CALIB_INTERVAL_MS 2000
+#define AGC_RESET_INTERVAL_MS 30000
+
+StdRNG rng;
+mesh::LocalIdentity identity;
+KissModem* modem;
+static uint32_t next_noise_floor_calib_ms = 0;
+static uint32_t next_agc_reset_ms = 0;
+
+void halt() {
+  while (1) ;
+}
+
+void loadOrCreateIdentity() {
+#if defined(NRF52_PLATFORM)
+  InternalFS.begin();
+  IdentityStore store(InternalFS, "");
+#elif defined(ESP32)
+  SPIFFS.begin(true);
+  IdentityStore store(SPIFFS, "/identity");
+#elif defined(RP2040_PLATFORM)
+  LittleFS.begin();
+  IdentityStore store(LittleFS, "/identity");
+  store.begin();
+#else
+  #error "Filesystem not defined"
+#endif
+
+  if (!store.load("_main", identity)) {
+    identity = radio_new_identity();
+    while (identity.pub_key[0] == 0x00 || identity.pub_key[0] == 0xFF) {
+      identity = radio_new_identity();
+    }
+    store.save("_main", identity);
+  }
+}
+
+void onSetRadio(float freq, float bw, uint8_t sf, uint8_t cr) {
+  radio_set_params(freq, bw, sf, cr);
+}
+
+void onSetTxPower(uint8_t power) {
+  radio_set_tx_power(power);
+}
+
+float onGetCurrentRssi() {
+  return radio_driver.getCurrentRSSI();
+}
+
+void onGetStats(uint32_t* rx, uint32_t* tx, uint32_t* errors) {
+  *rx = radio_driver.getPacketsRecv();
+  *tx = radio_driver.getPacketsSent();
+  *errors = radio_driver.getPacketsRecvErrors();
+}
+
+void setup() {
+  board.begin();
+
+  if (!radio_init()) {
+    halt();
+  }
+
+  radio_driver.begin();
+
+  rng.begin(radio_get_rng_seed());
+  loadOrCreateIdentity();
+
+  sensors.begin();
+
+#if defined(KISS_UART_RX) && defined(KISS_UART_TX)
+#if defined(ESP32)
+  Serial1.setPins(KISS_UART_RX, KISS_UART_TX);
+  Serial1.begin(115200);
+#elif defined(NRF52_PLATFORM)
+  ((Uart *)&Serial1)->setPins(KISS_UART_RX, KISS_UART_TX);
+  Serial1.begin(115200);
+#elif defined(RP2040_PLATFORM)
+  ((SerialUART *)&Serial1)->setRX(KISS_UART_RX);
+  ((SerialUART *)&Serial1)->setTX(KISS_UART_TX);
+  Serial1.begin(115200);
+#elif defined(STM32_PLATFORM)
+  ((HardwareSerial *)&Serial1)->setRx(KISS_UART_RX);
+  ((HardwareSerial *)&Serial1)->setTx(KISS_UART_TX);
+  Serial1.begin(115200);
+#else
+  #error "KISS UART not supported on this platform"
+#endif
+  modem = new KissModem(Serial1, identity, rng, radio_driver, board, sensors);
+#else
+  Serial.begin(115200);
+  uint32_t start = millis();
+  while (!Serial && millis() - start < 3000) delay(10);
+  delay(100);
+  modem = new KissModem(Serial, identity, rng, radio_driver, board, sensors);
+#endif
+
+  modem->setRadioCallback(onSetRadio);
+  modem->setTxPowerCallback(onSetTxPower);
+  modem->setGetCurrentRssiCallback(onGetCurrentRssi);
+  modem->setGetStatsCallback(onGetStats);
+  modem->begin();
+}
+
+void loop() {
+  modem->loop();
+
+  if (!modem->isActuallyTransmitting()) {
+    if (!modem->isTxBusy()) {
+      if ((uint32_t)(millis() - next_agc_reset_ms) >= AGC_RESET_INTERVAL_MS) {
+        radio_driver.resetAGC();
+        next_agc_reset_ms = millis();
+      }
+    }
+
+    uint8_t rx_buf[256];
+    int rx_len = radio_driver.recvRaw(rx_buf, sizeof(rx_buf));
+    if (rx_len > 0) {
+      int8_t snr = (int8_t)(radio_driver.getLastSNR() * 4);
+      int8_t rssi = (int8_t)radio_driver.getLastRSSI();
+      modem->onPacketReceived(snr, rssi, rx_buf, rx_len);
+    }
+  }
+
+  if ((uint32_t)(millis() - next_noise_floor_calib_ms) >= NOISE_FLOOR_CALIB_INTERVAL_MS) {
+    radio_driver.triggerNoiseFloorCalibrate(0);
+    next_noise_floor_calib_ms = millis();
+  }
+  radio_driver.loop();
+}

examples/simple_repeater/MyMesh.cpp

@@ -41,16 +41,21 @@
   #define TXT_ACK_DELAY 200
 #endif
 
-#define FIRMWARE_VER_LEVEL       1
+#define FIRMWARE_VER_LEVEL       2
 
 #define REQ_TYPE_GET_STATUS         0x01 // same as _GET_STATS
 #define REQ_TYPE_KEEP_ALIVE         0x02
 #define REQ_TYPE_GET_TELEMETRY_DATA 0x03
 #define REQ_TYPE_GET_ACCESS_LIST    0x05
 #define REQ_TYPE_GET_NEIGHBOURS     0x06
+#define REQ_TYPE_GET_OWNER_INFO     0x07     // FIRMWARE_VER_LEVEL >= 2
 
 #define RESP_SERVER_LOGIN_OK        0 // response to ANON_REQ
 
+#define ANON_REQ_TYPE_REGIONS      0x01
+#define ANON_REQ_TYPE_OWNER        0x02
+#define ANON_REQ_TYPE_BASIC        0x03   // just remote clock
+
 #define CLI_REPLY_DELAY_MILLIS      600
 
 #define LAZY_CONTACTS_WRITE_DELAY    5000
@@ -82,7 +87,7 @@ void MyMesh::putNeighbour(const mesh::Identity &id, uint32_t timestamp, float sn
 #endif
 }
 
-uint8_t MyMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data) {
+uint8_t MyMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data, bool is_flood) {
   ClientInfo* client = NULL;
   if (data[0] == 0) {   // blank password, just check if sender is in ACL
     client = acl.getClient(sender.pub_key, PUB_KEY_SIZE);
@@ -123,6 +128,10 @@ uint8_t MyMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secr
     }
   }
 
+  if (is_flood) {
+    client->out_path_len = OUT_PATH_UNKNOWN;  // need to rediscover out_path
+  }
+
   uint32_t now = getRTCClock()->getCurrentTimeUnique();
   memcpy(reply_data, &now, 4);   // response packets always prefixed with timestamp
   reply_data[4] = RESP_SERVER_LOGIN_OK;
@@ -135,6 +144,73 @@ uint8_t MyMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secr
   return 13;  // reply length
 }
 
+uint8_t MyMesh::handleAnonRegionsReq(const mesh::Identity& sender, uint32_t sender_timestamp, const uint8_t* data) {
+  if (anon_limiter.allow(rtc_clock.getCurrentTime())) {
+    // request data has: {reply-path-len}{reply-path}
+    reply_path_len = *data & 63;
+    reply_path_hash_size = (*data >> 6) + 1;
+    data++;
+
+    memcpy(reply_path, data, ((uint8_t)reply_path_len) * reply_path_hash_size);
+    // data += (uint8_t)reply_path_len * reply_path_hash_size;
+
+    memcpy(reply_data, &sender_timestamp, 4);   // prefix with sender_timestamp, like a tag
+    uint32_t now = getRTCClock()->getCurrentTime();
+    memcpy(&reply_data[4], &now, 4);     // include our clock (for easy clock sync, and packet hash uniqueness)
+
+    return 8 + region_map.exportNamesTo((char *) &reply_data[8], sizeof(reply_data) - 12, REGION_DENY_FLOOD);   // reply length
+  }
+  return 0;
+}
+
+uint8_t MyMesh::handleAnonOwnerReq(const mesh::Identity& sender, uint32_t sender_timestamp, const uint8_t* data) {
+  if (anon_limiter.allow(rtc_clock.getCurrentTime())) {
+    // request data has: {reply-path-len}{reply-path}
+    reply_path_len = *data & 63;
+    reply_path_hash_size = (*data >> 6) + 1;
+    data++;
+
+    memcpy(reply_path, data, ((uint8_t)reply_path_len) * reply_path_hash_size);
+    // data += (uint8_t)reply_path_len * reply_path_hash_size;
+
+    memcpy(reply_data, &sender_timestamp, 4);   // prefix with sender_timestamp, like a tag
+    uint32_t now = getRTCClock()->getCurrentTime();
+    memcpy(&reply_data[4], &now, 4);     // include our clock (for easy clock sync, and packet hash uniqueness)
+    sprintf((char *) &reply_data[8], "%s\n%s", _prefs.node_name, _prefs.owner_info);
+
+    return 8 + strlen((char *) &reply_data[8]);   // reply length
+  }
+  return 0;
+}
+
+uint8_t MyMesh::handleAnonClockReq(const mesh::Identity& sender, uint32_t sender_timestamp, const uint8_t* data) {
+  if (anon_limiter.allow(rtc_clock.getCurrentTime())) {
+    // request data has: {reply-path-len}{reply-path}
+    reply_path_len = *data & 63;
+    reply_path_hash_size = (*data >> 6) + 1;
+    data++;
+
+    memcpy(reply_path, data, ((uint8_t)reply_path_len) * reply_path_hash_size);
+    // data += (uint8_t)reply_path_len * reply_path_hash_size;
+
+    memcpy(reply_data, &sender_timestamp, 4);   // prefix with sender_timestamp, like a tag
+    uint32_t now = getRTCClock()->getCurrentTime();
+    memcpy(&reply_data[4], &now, 4);     // include our clock (for easy clock sync, and packet hash uniqueness)
+    reply_data[8] = 0;  // features
+#ifdef WITH_RS232_BRIDGE
+    reply_data[8] |= 0x01;  // is bridge, type UART
+#elif WITH_ESPNOW_BRIDGE
+    reply_data[8] |= 0x03;  // is bridge, type ESP-NOW
+#endif
+    if (_prefs.disable_fwd) {   // is this repeater currently disabled
+      reply_data[8] |= 0x80;  // is disabled
+    }
+    // TODO:  add some kind of moving-window utilisation metric, so can query 'how busy' is this repeater
+    return 9;   // reply length
+  }
+  return 0;
+}
+
 int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t *payload, size_t payload_len) {
   // uint32_t now = getRTCClock()->getCurrentTimeUnique();
   // memcpy(reply_data, &now, 4);   // response packets always prefixed with timestamp
@@ -159,7 +235,7 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
     stats.n_direct_dups = ((SimpleMeshTables *)getTables())->getNumDirectDups();
     stats.n_flood_dups = ((SimpleMeshTables *)getTables())->getNumFloodDups();
     stats.total_rx_air_time_secs = getReceiveAirTime() / 1000;
-
+    stats.n_recv_errors = radio_driver.getPacketsRecvErrors();
     memcpy(&reply_data[4], &stats, sizeof(stats));
 
     return 4 + sizeof(stats); //  reply_len
@@ -169,12 +245,19 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
 
     telemetry.reset();
     telemetry.addVoltage(TELEM_CHANNEL_SELF, (float)board.getBattMilliVolts() / 1000.0f);
+
     // query other sensors -- target specific
     if ((sender->permissions & PERM_ACL_ROLE_MASK) == PERM_ACL_GUEST) {
       perm_mask = 0x00;  // just base telemetry allowed
     }
     sensors.querySensors(perm_mask, telemetry);
 
+	// This default temperature will be overridden by external sensors (if any)
+    float temperature = board.getMCUTemperature();
+    if(!isnan(temperature)) { // Supported boards with built-in temperature sensor. ESP32-C3 may return NAN
+      telemetry.addTemperature(TELEM_CHANNEL_SELF, temperature); // Built-in MCU Temperature
+    }
+
     uint8_t tlen = telemetry.getSize();
     memcpy(&reply_data[4], telemetry.getBuffer(), tlen);
     return 4 + tlen; // reply_len
@@ -218,6 +301,7 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
 
       // create copy of neighbours list, skipping empty entries so we can sort it separately from main list
       int16_t neighbours_count = 0;
+#if MAX_NEIGHBOURS
       NeighbourInfo* sorted_neighbours[MAX_NEIGHBOURS];
       for (int i = 0; i < MAX_NEIGHBOURS; i++) {
         auto neighbour = &neighbours[i];
@@ -253,6 +337,7 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
           return a->snr < b->snr; // asc
         });
       }
+#endif
 
       // build results buffer
       int results_count = 0;
@@ -267,6 +352,7 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
           break;
         }
 
+#if MAX_NEIGHBOURS
         // add next neighbour to results
         auto neighbour = sorted_neighbours[index + offset];
         uint32_t heard_seconds_ago = getRTCClock()->getCurrentTime() - neighbour->heard_timestamp;
@@ -274,6 +360,7 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
         memcpy(&results_buffer[results_offset], &heard_seconds_ago, 4); results_offset += 4;
         memcpy(&results_buffer[results_offset], &neighbour->snr, 1); results_offset += 1;
         results_count++;
+#endif
 
       }
 
@@ -285,6 +372,9 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
 
       return reply_offset;
     }
+  } else if (payload[0] == REQ_TYPE_GET_OWNER_INFO) {
+    sprintf((char *) &reply_data[4], "%s\n%s\n%s", FIRMWARE_VERSION, _prefs.node_name, _prefs.owner_info);
+    return 4 + strlen((char *) &reply_data[4]);
   }
   return 0; // unknown command
 }
@@ -308,7 +398,7 @@ File MyMesh::openAppend(const char *fname) {
 
 bool MyMesh::allowPacketForward(const mesh::Packet *packet) {
   if (_prefs.disable_fwd) return false;
-  if (packet->isRouteFlood() && packet->path_len >= _prefs.flood_max) return false;
+  if (packet->isRouteFlood() && packet->getPathHashCount() >= _prefs.flood_max) return false;
   if (packet->isRouteFlood() && recv_pkt_region == NULL) {
     MESH_DEBUG_PRINTLN("allowPacketForward: unknown transport code, or wildcard not allowed for FLOOD packet");
     return false;
@@ -403,11 +493,11 @@ int MyMesh::calcRxDelay(float score, uint32_t air_time) const {
 }
 
 uint32_t MyMesh::getRetransmitDelay(const mesh::Packet *packet) {
-  uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.tx_delay_factor);
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * _prefs.tx_delay_factor);
   return getRNG()->nextInt(0, 5*t + 1);
 }
 uint32_t MyMesh::getDirectRetransmitDelay(const mesh::Packet *packet) {
-  uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.direct_tx_delay_factor);
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * _prefs.direct_tx_delay_factor);
   return getRNG()->nextInt(0, 5*t + 1);
 }
 
@@ -437,12 +527,18 @@ void MyMesh::onAnonDataRecv(mesh::Packet *packet, const uint8_t *secret, const m
 
     data[len] = 0;  // ensure null terminator
     uint8_t reply_len;
+
+    reply_path_len = -1;
     if (data[4] == 0 || data[4] >= ' ') {   // is password, ie. a login request
-      reply_len = handleLoginReq(sender, secret, timestamp, &data[4]);
-    //} else if (data[4] == ANON_REQ_TYPE_*) {   // future type codes
-      // TODO
+      reply_len = handleLoginReq(sender, secret, timestamp, &data[4], packet->isRouteFlood());
+    } else if (data[4] == ANON_REQ_TYPE_REGIONS && packet->isRouteDirect()) {
+      reply_len = handleAnonRegionsReq(sender, timestamp, &data[5]);
+    } else if (data[4] == ANON_REQ_TYPE_OWNER && packet->isRouteDirect()) {
+      reply_len = handleAnonOwnerReq(sender, timestamp, &data[5]);
+    } else if (data[4] == ANON_REQ_TYPE_BASIC && packet->isRouteDirect()) {
+      reply_len = handleAnonClockReq(sender, timestamp, &data[5]);
     } else {
-      reply_len = 0;  // unknown request type
+      reply_len = 0;  // unknown/invalid request type
     }
 
     if (reply_len == 0) return;   // invalid request
@@ -451,10 +547,14 @@ void MyMesh::onAnonDataRecv(mesh::Packet *packet, const uint8_t *secret, const m
       // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the response
       mesh::Packet* path = createPathReturn(sender, secret, packet->path, packet->path_len,
                                             PAYLOAD_TYPE_RESPONSE, reply_data, reply_len);
-      if (path) sendFlood(path, SERVER_RESPONSE_DELAY);
+      if (path) sendFlood(path, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
+    } else if (reply_path_len < 0) {
+      mesh::Packet* reply = createDatagram(PAYLOAD_TYPE_RESPONSE, sender, secret, reply_data, reply_len);
+      if (reply) sendFlood(reply, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
     } else {
       mesh::Packet* reply = createDatagram(PAYLOAD_TYPE_RESPONSE, sender, secret, reply_data, reply_len);
-      if (reply) sendFlood(reply, SERVER_RESPONSE_DELAY);
+      uint8_t path_len = ((reply_path_hash_size - 1) << 6) | (reply_path_len & 63);
+      if (reply) sendDirect(reply, reply_path,  path_len, SERVER_RESPONSE_DELAY);
     }
   }
 }
@@ -523,15 +623,15 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
         // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the response
         mesh::Packet *path = createPathReturn(client->id, secret, packet->path, packet->path_len,
                                               PAYLOAD_TYPE_RESPONSE, reply_data, reply_len);
-        if (path) sendFlood(path, SERVER_RESPONSE_DELAY);
+        if (path) sendFlood(path, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
       } else {
         mesh::Packet *reply =
             createDatagram(PAYLOAD_TYPE_RESPONSE, client->id, secret, reply_data, reply_len);
         if (reply) {
-          if (client->out_path_len >= 0) { // we have an out_path, so send DIRECT
+          if (client->out_path_len != OUT_PATH_UNKNOWN) { // we have an out_path, so send DIRECT
             sendDirect(reply, client->out_path, client->out_path_len, SERVER_RESPONSE_DELAY);
           } else {
-            sendFlood(reply, SERVER_RESPONSE_DELAY);
+            sendFlood(reply, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
           }
         }
       }
@@ -541,7 +641,7 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
   } else if (type == PAYLOAD_TYPE_TXT_MSG && len > 5 && client->isAdmin()) { // a CLI command
     uint32_t sender_timestamp;
     memcpy(&sender_timestamp, data, 4); // timestamp (by sender's RTC clock - which could be wrong)
-    uint flags = (data[4] >> 2);        // message attempt number, and other flags
+    uint8_t flags = (data[4] >> 2);        // message attempt number, and other flags
 
     if (!(flags == TXT_TYPE_PLAIN || flags == TXT_TYPE_CLI_DATA)) {
       MESH_DEBUG_PRINTLN("onPeerDataRecv: unsupported text type received: flags=%02x", (uint32_t)flags);
@@ -561,8 +661,8 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
 
         mesh::Packet *ack = createAck(ack_hash);
         if (ack) {
-          if (client->out_path_len < 0) {
-            sendFlood(ack, TXT_ACK_DELAY);
+          if (client->out_path_len == OUT_PATH_UNKNOWN) {
+            sendFlood(ack, TXT_ACK_DELAY, packet->getPathHashSize());
           } else {
             sendDirect(ack, client->out_path, client->out_path_len, TXT_ACK_DELAY);
           }
@@ -589,8 +689,8 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
 
         auto reply = createDatagram(PAYLOAD_TYPE_TXT_MSG, client->id, secret, temp, 5 + text_len);
         if (reply) {
-          if (client->out_path_len < 0) {
-            sendFlood(reply, CLI_REPLY_DELAY_MILLIS);
+          if (client->out_path_len == OUT_PATH_UNKNOWN) {
+            sendFlood(reply, CLI_REPLY_DELAY_MILLIS, packet->getPathHashSize());
           } else {
             sendDirect(reply, client->out_path, client->out_path_len, CLI_REPLY_DELAY_MILLIS);
           }
@@ -611,7 +711,8 @@ bool MyMesh::onPeerPathRecv(mesh::Packet *packet, int sender_idx, const uint8_t
     MESH_DEBUG_PRINTLN("PATH to client, path_len=%d", (uint32_t)path_len);
     auto client = acl.getClientByIdx(i);
 
-    memcpy(client->out_path, path, client->out_path_len = path_len); // store a copy of path, for sendDirect()
+    // store a copy of path, for sendDirect()
+    client->out_path_len = mesh::Packet::copyPath(client->out_path, path, path_len);
     client->last_activity = getRTCClock()->getCurrentTime();
   } else {
     MESH_DEBUG_PRINTLN("onPeerPathRecv: invalid peer idx: %d", i);
@@ -626,7 +727,9 @@ bool MyMesh::onPeerPathRecv(mesh::Packet *packet, int sender_idx, const uint8_t
 
 void MyMesh::onControlDataRecv(mesh::Packet* packet) {
   uint8_t type = packet->payload[0] & 0xF0;    // just test upper 4 bits
-  if (type == CTL_TYPE_NODE_DISCOVER_REQ && packet->payload_len >= 6 && discover_limiter.allow(rtc_clock.getCurrentTime())) {
+  if (type == CTL_TYPE_NODE_DISCOVER_REQ && packet->payload_len >= 6
+      && !_prefs.disable_fwd && discover_limiter.allow(rtc_clock.getCurrentTime())
+  ) {
     int i = 1;
     uint8_t  filter = packet->payload[i++];
     uint32_t tag;
@@ -650,14 +753,56 @@ void MyMesh::onControlDataRecv(mesh::Packet* packet) {
         sendZeroHop(resp, getRetransmitDelay(resp)*4);  // apply random delay (widened x4), as multiple nodes can respond to this
       }
     }
+  } else if (type == CTL_TYPE_NODE_DISCOVER_RESP && packet->payload_len >= 6) {
+    uint8_t node_type = packet->payload[0] & 0x0F;
+    if (node_type != ADV_TYPE_REPEATER) {
+      return;
+    }
+    if (packet->payload_len < 6 + PUB_KEY_SIZE) {
+      MESH_DEBUG_PRINTLN("onControlDataRecv: DISCOVER_RESP pubkey too short: %d", (uint32_t)packet->payload_len);
+      return;
+    }
+
+    if (pending_discover_tag == 0 || millisHasNowPassed(pending_discover_until)) {
+      pending_discover_tag = 0;
+      return;
+    }
+    uint32_t tag;
+    memcpy(&tag, &packet->payload[2], 4);
+    if (tag != pending_discover_tag) {
+      return;
+    }
+
+    mesh::Identity id(&packet->payload[6]);
+    if (id.matches(self_id)) {
+      return;
+    }
+    putNeighbour(id, rtc_clock.getCurrentTime(), packet->getSNR());
+  }
+}
+
+void MyMesh::sendNodeDiscoverReq() {
+  uint8_t data[10];
+  data[0] = CTL_TYPE_NODE_DISCOVER_REQ; // prefix_only=0
+  data[1] = (1 << ADV_TYPE_REPEATER);
+  getRNG()->random(&data[2], 4); // tag
+  memcpy(&pending_discover_tag, &data[2], 4);
+  pending_discover_until = futureMillis(60000);
+  uint32_t since = 0;
+  memcpy(&data[6], &since, 4);
+
+  auto pkt = createControlData(data, sizeof(data));
+  if (pkt) {
+    sendZeroHop(pkt);
   }
 }
 
 MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondClock &ms, mesh::RNG &rng,
                mesh::RTCClock &rtc, mesh::MeshTables &tables)
     : mesh::Mesh(radio, ms, rng, rtc, *new StaticPoolPacketManager(32), tables),
-      _cli(board, rtc, sensors, &_prefs, this), telemetry(MAX_PACKET_PAYLOAD - 4), region_map(key_store), temp_map(key_store),
-      discover_limiter(4, 120)  // max 4 every 2 minutes
+      _cli(board, rtc, sensors, acl, &_prefs, this), telemetry(MAX_PACKET_PAYLOAD - 4), region_map(key_store), temp_map(key_store),
+      discover_limiter(4, 120),  // max 4 every 2 minutes
+      anon_limiter(4, 180)   // max 4 every 3 minutes
 #if defined(WITH_RS232_BRIDGE)
       , bridge(&_prefs, WITH_RS232_BRIDGE, _mgr, &rtc)
 #endif
@@ -682,7 +827,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   _prefs.airtime_factor = 1.0;   // one half
   _prefs.rx_delay_base = 0.0f;   // turn off by default, was 10.0;
   _prefs.tx_delay_factor = 0.5f; // was 0.25f
-  _prefs.direct_tx_delay_factor = 0.2f; // was zero
+  _prefs.direct_tx_delay_factor = 0.3f; // was 0.2
   StrHelper::strncpy(_prefs.node_name, ADVERT_NAME, sizeof(_prefs.node_name));
   _prefs.node_lat = ADVERT_LAT;
   _prefs.node_lon = ADVERT_LON;
@@ -710,6 +855,11 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   _prefs.gps_enabled = 0;
   _prefs.gps_interval = 0;
   _prefs.advert_loc_policy = ADVERT_LOC_PREFS;
+
+  _prefs.adc_multiplier = 0.0f; // 0.0f means use default board multiplier
+
+  pending_discover_tag = 0;
+  pending_discover_until = 0;
 }
 
 void MyMesh::begin(FILESYSTEM *fs) {
@@ -717,7 +867,7 @@ void MyMesh::begin(FILESYSTEM *fs) {
   _fs = fs;
   // load persisted prefs
   _cli.loadPrefs(_fs);
-  acl.load(_fs);
+  acl.load(_fs, self_id);
   // TODO: key_store.begin();
   region_map.load(_fs);
 
@@ -733,6 +883,8 @@ void MyMesh::begin(FILESYSTEM *fs) {
   updateAdvertTimer();
   updateFloodAdvertTimer();
 
+  board.setAdcMultiplier(_prefs.adc_multiplier);
+
 #if ENV_INCLUDE_GPS == 1
   applyGpsPrefs();
 #endif
@@ -761,10 +913,14 @@ bool MyMesh::formatFileSystem() {
 #endif
 }
 
-void MyMesh::sendSelfAdvertisement(int delay_millis) {
+void MyMesh::sendSelfAdvertisement(int delay_millis, bool flood) {
   mesh::Packet *pkt = createSelfAdvert();
   if (pkt) {
-    sendFlood(pkt, delay_millis);
+    if (flood) {
+      sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
+    } else {
+      sendZeroHop(pkt, delay_millis);
+    }
   } else {
     MESH_DEBUG_PRINTLN("ERROR: unable to create advertisement packet!");
   }
@@ -802,7 +958,7 @@ void MyMesh::dumpLogFile() {
   }
 }
 
-void MyMesh::setTxPower(uint8_t power_dbm) {
+void MyMesh::setTxPower(int8_t power_dbm) {
   radio_set_tx_power(power_dbm);
 }
 
@@ -875,7 +1031,6 @@ void MyMesh::formatPacketStatsReply(char *reply) {
 }
 
 void MyMesh::saveIdentity(const mesh::LocalIdentity &new_id) {
-  self_id = new_id;
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   IdentityStore store(*_fs, "");
 #elif defined(ESP32)
@@ -885,7 +1040,7 @@ void MyMesh::saveIdentity(const mesh::LocalIdentity &new_id) {
 #else
 #error "need to define saveIdentity()"
 #endif
-  store.save("_main", self_id);
+  store.save("_main", new_id);
 }
 
 void MyMesh::clearStats() {
@@ -976,8 +1131,8 @@ void MyMesh::handleCommand(uint32_t sender_timestamp, char *command, char *reply
 
     const char* parts[4];
     int n = mesh::Utils::parseTextParts(command, parts, 4, ' ');
-    if (n == 1 && sender_timestamp == 0) {
-      region_map.exportTo(Serial);
+    if (n == 1) {
+      region_map.exportTo(reply, 160);
     } else if (n >= 2 && strcmp(parts[1], "load") == 0) {
       temp_map.resetFrom(region_map);   // rebuild regions in a temp instance
       memset(load_stack, 0, sizeof(load_stack));
@@ -1050,9 +1205,37 @@ void MyMesh::handleCommand(uint32_t sender_timestamp, char *command, char *reply
       } else {
         strcpy(reply, "Err - not found");
       }
+    } else if (n >= 3 && strcmp(parts[1], "list") == 0) {
+      uint8_t mask = 0;
+      bool invert = false;
+      
+      if (strcmp(parts[2], "allowed") == 0) {
+        mask = REGION_DENY_FLOOD;
+        invert = false;  // list regions that DON'T have DENY flag
+      } else if (strcmp(parts[2], "denied") == 0) {
+        mask = REGION_DENY_FLOOD;
+        invert = true;   // list regions that DO have DENY flag
+      } else {
+        strcpy(reply, "Err - use 'allowed' or 'denied'");
+        return;
+      }
+      
+      int len = region_map.exportNamesTo(reply, 160, mask, invert);
+      if (len == 0) {
+        strcpy(reply, "-none-");
+      }
     } else {
       strcpy(reply, "Err - ??");
     }
+  } else if (memcmp(command, "discover.neighbors", 18) == 0) {
+    const char* sub = command + 18;
+    while (*sub == ' ') sub++;
+    if (*sub != 0) {
+      strcpy(reply, "Err - discover.neighbors has no options");
+    } else {
+      sendNodeDiscoverReq();
+      strcpy(reply, "OK - Discover sent");
+    }
   } else{
     _cli.handleCommand(sender_timestamp, command, reply);  // common CLI commands
   }
@@ -1101,3 +1284,11 @@ void MyMesh::loop() {
   uptime_millis += now - last_millis;
   last_millis = now;
 }
+
+// To check if there is pending work
+bool MyMesh::hasPendingWork() const {
+#if defined(WITH_BRIDGE)
+  if (bridge.isRunning()) return true;  // bridge needs WiFi radio, can't sleep
+#endif
+  return _mgr->getOutboundCount(0xFFFFFFFF) > 0;
+}

examples/simple_repeater/MyMesh.h

@@ -54,6 +54,7 @@ struct RepeaterStats {
   int16_t  last_snr;   // x 4
   uint16_t n_direct_dups, n_flood_dups;
   uint32_t total_rx_air_time_secs;
+  uint32_t n_recv_errors;
 };
 
 #ifndef MAX_CLIENTS
@@ -68,11 +69,11 @@ struct NeighbourInfo {
 };
 
 #ifndef FIRMWARE_BUILD_DATE
-  #define FIRMWARE_BUILD_DATE   "13 Nov 2025"
+  #define FIRMWARE_BUILD_DATE   "15 Feb 2026"
 #endif
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.10.0"
+  #define FIRMWARE_VERSION   "v1.13.0"
 #endif
 
 #define FIRMWARE_ROLE "repeater"
@@ -86,14 +87,19 @@ class MyMesh : public mesh::Mesh, public CommonCLICallbacks {
   unsigned long next_local_advert, next_flood_advert;
   bool _logging;
   NodePrefs _prefs;
+  ClientACL  acl;
   CommonCLI _cli;
   uint8_t reply_data[MAX_PACKET_PAYLOAD];
-  ClientACL  acl;
+  uint8_t reply_path[MAX_PATH_SIZE];
+  int8_t  reply_path_len;
+  uint8_t reply_path_hash_size;
   TransportKeyStore key_store;
   RegionMap region_map, temp_map;
   RegionEntry* load_stack[8];
   RegionEntry* recv_pkt_region;
-  RateLimiter discover_limiter;
+  RateLimiter discover_limiter, anon_limiter;
+  uint32_t pending_discover_tag;
+  unsigned long pending_discover_until;
   bool region_load_active;
   unsigned long dirty_contacts_expiry;
 #if MAX_NEIGHBOURS
@@ -113,7 +119,11 @@ class MyMesh : public mesh::Mesh, public CommonCLICallbacks {
 #endif
 
   void putNeighbour(const mesh::Identity& id, uint32_t timestamp, float snr);
-  uint8_t handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data);
+  void sendNodeDiscoverReq();
+  uint8_t handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data, bool is_flood);
+  uint8_t handleAnonRegionsReq(const mesh::Identity& sender, uint32_t sender_timestamp, const uint8_t* data);
+  uint8_t handleAnonOwnerReq(const mesh::Identity& sender, uint32_t sender_timestamp, const uint8_t* data);
+  uint8_t handleAnonClockReq(const mesh::Identity& sender, uint32_t sender_timestamp, const uint8_t* data);
   int handleRequest(ClientInfo* sender, uint32_t sender_timestamp, uint8_t* payload, size_t payload_len);
   mesh::Packet* createSelfAdvert();
 
@@ -181,7 +191,7 @@ public:
 
   void applyTempRadioParams(float freq, float bw, uint8_t sf, uint8_t cr, int timeout_mins) override;
   bool formatFileSystem() override;
-  void sendSelfAdvertisement(int delay_millis) override;
+  void sendSelfAdvertisement(int delay_millis, bool flood) override;
   void updateAdvertTimer() override;
   void updateFloodAdvertTimer() override;
 
@@ -192,7 +202,7 @@ public:
   }
 
   void dumpLogFile() override;
-  void setTxPower(uint8_t power_dbm) override;
+  void setTxPower(int8_t power_dbm) override;
   void formatNeighborsReply(char *reply) override;
   void removeNeighbor(const uint8_t* pubkey, int key_len) override;
   void formatStatsReply(char *reply) override;
@@ -225,4 +235,7 @@ public:
     bridge.begin();
   }
 #endif
+
+  // To check if there is pending work
+  bool hasPendingWork() const;
 };

examples/simple_repeater/main.cpp

@@ -19,12 +19,25 @@ void halt() {
 
 static char command[160];
 
+// For power saving
+unsigned long lastActive = 0; // mark last active time
+unsigned long nextSleepinSecs = 120; // next sleep in seconds. The first sleep (if enabled) is after 2 minutes from boot
+
 void setup() {
   Serial.begin(115200);
   delay(1000);
 
   board.begin();
 
+#if defined(MESH_DEBUG) && defined(NRF52_PLATFORM)
+  // give some extra time for serial to settle so
+  // boot debug messages can be seen on terminal
+  delay(5000);
+#endif
+
+  // For power saving
+  lastActive = millis(); // mark last active time since boot
+
 #ifdef DISPLAY_CLASS
   if (display.begin()) {
     display.startFrame();
@@ -35,6 +48,7 @@ void setup() {
 #endif
 
   if (!radio_init()) {
+    MESH_DEBUG_PRINTLN("Radio init failed!");
     halt();
   }
 
@@ -80,8 +94,10 @@ void setup() {
   ui_task.begin(the_mesh.getNodePrefs(), FIRMWARE_BUILD_DATE, FIRMWARE_VERSION);
 #endif
 
-  // send out initial Advertisement to the mesh
-  the_mesh.sendSelfAdvertisement(16000);
+  // send out initial zero hop Advertisement to the mesh
+#if ENABLE_ADVERT_ON_BOOT == 1
+  the_mesh.sendSelfAdvertisement(16000, false);
+#endif
 }
 
 void loop() {
@@ -117,4 +133,18 @@ void loop() {
   ui_task.loop();
 #endif
   rtc_clock.tick();
+
+  if (the_mesh.getNodePrefs()->powersaving_enabled && !the_mesh.hasPendingWork()) {
+    #if defined(NRF52_PLATFORM)
+    board.sleep(1800); // nrf ignores seconds param, sleeps whenever possible
+    #else
+    if (the_mesh.millisHasNowPassed(lastActive + nextSleepinSecs * 1000)) { // To check if it is time to sleep
+      board.sleep(1800);             // To sleep. Wake up after 30 minutes or when receiving a LoRa packet
+      lastActive = millis();
+      nextSleepinSecs = 5;  // Default: To work for 5s and sleep again
+    } else {
+      nextSleepinSecs += 5; // When there is pending work, to work another 5s
+    }
+    #endif
+  }
 }

examples/simple_room_server/MyMesh.cpp

@@ -73,13 +73,15 @@ void MyMesh::pushPostToClient(ClientInfo *client, PostInfo &post) {
 
   auto reply = createDatagram(PAYLOAD_TYPE_TXT_MSG, client->id, client->shared_secret, reply_data, len);
   if (reply) {
-    if (client->out_path_len < 0) {
-      sendFlood(reply);
+    if (client->out_path_len == OUT_PATH_UNKNOWN) {
+      unsigned long delay_millis = 0;
+      sendFlood(reply, delay_millis, _prefs.path_hash_mode + 1);
       client->extra.room.ack_timeout = futureMillis(PUSH_ACK_TIMEOUT_FLOOD);
     } else {
       sendDirect(reply, client->out_path, client->out_path_len);
-      client->extra.room.ack_timeout =
-          futureMillis(PUSH_TIMEOUT_BASE + PUSH_ACK_TIMEOUT_FACTOR * (client->out_path_len + 1));
+
+      uint8_t path_hash_count = client->out_path_len & 63;
+      client->extra.room.ack_timeout = futureMillis(PUSH_TIMEOUT_BASE + PUSH_ACK_TIMEOUT_FACTOR * (path_hash_count + 1));
     }
     _num_post_pushes++; // stats
   } else {
@@ -264,17 +266,17 @@ const char *MyMesh::getLogDateTime() {
 }
 
 uint32_t MyMesh::getRetransmitDelay(const mesh::Packet *packet) {
-  uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.tx_delay_factor);
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * _prefs.tx_delay_factor);
   return getRNG()->nextInt(0, 5*t + 1);
 }
 uint32_t MyMesh::getDirectRetransmitDelay(const mesh::Packet *packet) {
-  uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.direct_tx_delay_factor);
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * _prefs.direct_tx_delay_factor);
   return getRNG()->nextInt(0, 5*t + 1);
 }
 
 bool MyMesh::allowPacketForward(const mesh::Packet *packet) {
   if (_prefs.disable_fwd) return false;
-  if (packet->isRouteFlood() && packet->path_len >= _prefs.flood_max) return false;
+  if (packet->isRouteFlood() && packet->getPathHashCount() >= _prefs.flood_max) return false;
   return true;
 }
 
@@ -332,6 +334,10 @@ void MyMesh::onAnonDataRecv(mesh::Packet *packet, const uint8_t *secret, const m
       dirty_contacts_expiry = futureMillis(LAZY_CONTACTS_WRITE_DELAY);
     }
 
+    if (packet->isRouteFlood()) {
+      client->out_path_len = OUT_PATH_UNKNOWN;  // need to rediscover out_path
+    }
+
     uint32_t now = getRTCClock()->getCurrentTimeUnique();
     memcpy(reply_data, &now, 4); // response packets always prefixed with timestamp
     // TODO: maybe reply with count of messages waiting to be synced for THIS client?
@@ -349,14 +355,14 @@ void MyMesh::onAnonDataRecv(mesh::Packet *packet, const uint8_t *secret, const m
       // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the response
       mesh::Packet *path = createPathReturn(sender, client->shared_secret, packet->path, packet->path_len,
                                             PAYLOAD_TYPE_RESPONSE, reply_data, 13);
-      if (path) sendFlood(path, SERVER_RESPONSE_DELAY);
+      if (path) sendFlood(path, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
     } else {
       mesh::Packet *reply = createDatagram(PAYLOAD_TYPE_RESPONSE, sender, client->shared_secret, reply_data, 13);
       if (reply) {
-        if (client->out_path_len >= 0) { // we have an out_path, so send DIRECT
+        if (client->out_path_len != OUT_PATH_UNKNOWN) { // we have an out_path, so send DIRECT
           sendDirect(reply, client->out_path, client->out_path_len, SERVER_RESPONSE_DELAY);
         } else {
-          sendFlood(reply, SERVER_RESPONSE_DELAY);
+          sendFlood(reply, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
         }
       }
     }
@@ -394,7 +400,7 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
   if (type == PAYLOAD_TYPE_TXT_MSG && len > 5) { // a CLI command or new Post
     uint32_t sender_timestamp;
     memcpy(&sender_timestamp, data, 4); // timestamp (by sender's RTC clock - which could be wrong)
-    uint flags = (data[4] >> 2);        // message attempt number, and other flags
+    uint8_t flags = (data[4] >> 2);        // message attempt number, and other flags
 
     if (!(flags == TXT_TYPE_PLAIN || flags == TXT_TYPE_CLI_DATA)) {
       MESH_DEBUG_PRINTLN("onPeerDataRecv: unsupported command flags received: flags=%02x", (uint32_t)flags);
@@ -444,9 +450,9 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
 
       uint32_t delay_millis;
       if (send_ack) {
-        if (client->out_path_len < 0) {
+        if (client->out_path_len == OUT_PATH_UNKNOWN) {
           mesh::Packet *ack = createAck(ack_hash);
-          if (ack) sendFlood(ack, TXT_ACK_DELAY);
+          if (ack) sendFlood(ack, TXT_ACK_DELAY, packet->getPathHashSize());
           delay_millis = TXT_ACK_DELAY + REPLY_DELAY_MILLIS;
         } else {
           uint32_t d = TXT_ACK_DELAY;
@@ -478,8 +484,8 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
 
         auto reply = createDatagram(PAYLOAD_TYPE_TXT_MSG, client->id, secret, temp, 5 + text_len);
         if (reply) {
-          if (client->out_path_len < 0) {
-            sendFlood(reply, delay_millis + SERVER_RESPONSE_DELAY);
+          if (client->out_path_len == OUT_PATH_UNKNOWN) {
+            sendFlood(reply, delay_millis + SERVER_RESPONSE_DELAY, packet->getPathHashSize());
           } else {
             sendDirect(reply, client->out_path, client->out_path_len, delay_millis + SERVER_RESPONSE_DELAY);
           }
@@ -517,7 +523,7 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
         // if client sends too quickly, evict()
 
         // RULE: only send keep_alive response DIRECT!
-        if (client->out_path_len >= 0) {
+        if (client->out_path_len != OUT_PATH_UNKNOWN) {
           uint32_t ack_hash; // calc ACK to prove to sender that we got request
           mesh::Utils::sha256((uint8_t *)&ack_hash, 4, data, 9, client->id.pub_key, PUB_KEY_SIZE);
 
@@ -534,14 +540,14 @@ void MyMesh::onPeerDataRecv(mesh::Packet *packet, uint8_t type, int sender_idx,
             // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the response
             mesh::Packet *path = createPathReturn(client->id, secret, packet->path, packet->path_len,
                                                   PAYLOAD_TYPE_RESPONSE, reply_data, reply_len);
-            if (path) sendFlood(path, SERVER_RESPONSE_DELAY);
+            if (path) sendFlood(path, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
           } else {
             mesh::Packet *reply = createDatagram(PAYLOAD_TYPE_RESPONSE, client->id, secret, reply_data, reply_len);
             if (reply) {
-              if (client->out_path_len >= 0) { // we have an out_path, so send DIRECT
+              if (client->out_path_len != OUT_PATH_UNKNOWN) { // we have an out_path, so send DIRECT
                 sendDirect(reply, client->out_path, client->out_path_len, SERVER_RESPONSE_DELAY);
               } else {
-                sendFlood(reply, SERVER_RESPONSE_DELAY);
+                sendFlood(reply, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
               }
             }
           }
@@ -559,7 +565,7 @@ bool MyMesh::onPeerPathRecv(mesh::Packet *packet, int sender_idx, const uint8_t
   if (i >= 0 && i < acl.getNumClients()) { // get from our known_clients table (sender SHOULD already be known in this context)
     MESH_DEBUG_PRINTLN("PATH to client, path_len=%d", (uint32_t)path_len);
     auto client = acl.getClientByIdx(i);
-    memcpy(client->out_path, path, client->out_path_len = path_len); // store a copy of path, for sendDirect()
+    client->out_path_len = mesh::Packet::copyPath(client->out_path, path, path_len); // store a copy of path, for sendDirect()
     client->last_activity = getRTCClock()->getCurrentTime();
   } else {
     MESH_DEBUG_PRINTLN("onPeerPathRecv: invalid peer idx: %d", i);
@@ -583,7 +589,7 @@ void MyMesh::onAckRecv(mesh::Packet *packet, uint32_t ack_crc) {
 MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondClock &ms, mesh::RNG &rng,
                mesh::RTCClock &rtc, mesh::MeshTables &tables)
     : mesh::Mesh(radio, ms, rng, rtc, *new StaticPoolPacketManager(32), tables),
-      _cli(board, rtc, sensors, &_prefs, this), telemetry(MAX_PACKET_PAYLOAD - 4) {
+      _cli(board, rtc, sensors, acl, &_prefs, this), telemetry(MAX_PACKET_PAYLOAD - 4) {
   last_millis = 0;
   uptime_millis = 0;
   next_local_advert = next_flood_advert = 0;
@@ -633,7 +639,7 @@ void MyMesh::begin(FILESYSTEM *fs) {
   // load persisted prefs
   _cli.loadPrefs(_fs);
 
-  acl.load(_fs);
+  acl.load(_fs, self_id);
 
   radio_set_params(_prefs.freq, _prefs.bw, _prefs.sf, _prefs.cr);
   radio_set_tx_power(_prefs.tx_power_dbm);
@@ -641,6 +647,8 @@ void MyMesh::begin(FILESYSTEM *fs) {
   updateAdvertTimer();
   updateFloodAdvertTimer();
 
+  board.setAdcMultiplier(_prefs.adc_multiplier);
+
 #if ENV_INCLUDE_GPS == 1
   applyGpsPrefs();
 #endif
@@ -669,10 +677,14 @@ bool MyMesh::formatFileSystem() {
 #endif
 }
 
-void MyMesh::sendSelfAdvertisement(int delay_millis) {
+void MyMesh::sendSelfAdvertisement(int delay_millis, bool flood) {
   mesh::Packet *pkt = createSelfAdvert();
   if (pkt) {
-    sendFlood(pkt, delay_millis);
+    if (flood) {
+      sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
+    } else {
+      sendZeroHop(pkt, delay_millis);
+    }
   } else {
     MESH_DEBUG_PRINTLN("ERROR: unable to create advertisement packet!");
   }
@@ -709,12 +721,11 @@ void MyMesh::dumpLogFile() {
   }
 }
 
-void MyMesh::setTxPower(uint8_t power_dbm) {
+void MyMesh::setTxPower(int8_t power_dbm) {
   radio_set_tx_power(power_dbm);
 }
 
 void MyMesh::saveIdentity(const mesh::LocalIdentity &new_id) {
-  self_id = new_id;
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   IdentityStore store(*_fs, "");
 #elif defined(ESP32)
@@ -724,7 +735,7 @@ void MyMesh::saveIdentity(const mesh::LocalIdentity &new_id) {
 #else
 #error "need to define saveIdentity()"
 #endif
-  store.save("_main", self_id);
+  store.save("_main", new_id);
 }
 
 void MyMesh::clearStats() {
@@ -809,7 +820,7 @@ void MyMesh::loop() {
       if (c->extra.room.pending_ack && millisHasNowPassed(c->extra.room.ack_timeout)) {
         c->extra.room.push_failures++;
         c->extra.room.pending_ack = 0; // reset  (TODO: keep prev expected_ack's in a list, incase they arrive LATER, after we retry)
-        MESH_DEBUG_PRINTLN("pending ACK timed out: push_failures: %d", (uint32_t)c->push_failures);
+        MESH_DEBUG_PRINTLN("pending ACK timed out: push_failures: %d", (uint32_t)c->extra.room.push_failures);
       }
     }
     // check next Round-Robin client, and sync next new post

examples/simple_room_server/MyMesh.h

@@ -26,11 +26,11 @@
 /* ------------------------------ Config -------------------------------- */
 
 #ifndef FIRMWARE_BUILD_DATE
-  #define FIRMWARE_BUILD_DATE   "13 Nov 2025"
+  #define FIRMWARE_BUILD_DATE   "15 Feb 2026"
 #endif
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.10.0"
+  #define FIRMWARE_VERSION   "v1.13.0"
 #endif
 
 #ifndef LORA_FREQ
@@ -94,8 +94,8 @@ class MyMesh : public mesh::Mesh, public CommonCLICallbacks {
   unsigned long next_local_advert, next_flood_advert;
   bool _logging;
   NodePrefs _prefs;
-  CommonCLI _cli;
   ClientACL acl;
+  CommonCLI _cli;
   unsigned long dirty_contacts_expiry;
   uint8_t reply_data[MAX_PACKET_PAYLOAD];
   unsigned long next_push;
@@ -177,7 +177,7 @@ public:
 
   void applyTempRadioParams(float freq, float bw, uint8_t sf, uint8_t cr, int timeout_mins) override;
   bool formatFileSystem() override;
-  void sendSelfAdvertisement(int delay_millis) override;
+  void sendSelfAdvertisement(int delay_millis, bool flood) override;
   void updateAdvertTimer() override;
   void updateFloodAdvertTimer() override;
 
@@ -188,7 +188,7 @@ public:
   }
 
   void dumpLogFile() override;
-  void setTxPower(uint8_t power_dbm) override;
+  void setTxPower(int8_t power_dbm) override;
 
   void formatNeighborsReply(char *reply) override {
     strcpy(reply, "not supported");

examples/simple_room_server/main.cpp

@@ -76,8 +76,10 @@ void setup() {
   ui_task.begin(the_mesh.getNodePrefs(), FIRMWARE_BUILD_DATE, FIRMWARE_VERSION);
 #endif
 
-  // send out initial Advertisement to the mesh
-  the_mesh.sendSelfAdvertisement(16000);
+  // send out initial zero hop Advertisement to the mesh
+#if ENABLE_ADVERT_ON_BOOT == 1
+  the_mesh.sendSelfAdvertisement(16000, false);
+#endif
 }
 
 void loop() {

examples/simple_secure_chat/main.cpp

@@ -66,7 +66,7 @@ struct NodePrefs {  // persisted to file
   char node_name[32];
   double node_lat, node_lon;
   float freq;
-  uint8_t tx_power_dbm;
+  int8_t tx_power_dbm;
   uint8_t unused[3];
 };
 
@@ -213,7 +213,7 @@ protected:
   }
 
   void onContactPathUpdated(const ContactInfo& contact) override {
-    Serial.printf("PATH to: %s, path_len=%d\n", contact.name, (int32_t) contact.out_path_len);
+    Serial.printf("PATH to: %s, path_len=%d\n", contact.name, (uint32_t) contact.out_path_len);
     saveContacts();
   }
 
@@ -266,8 +266,9 @@ protected:
     return SEND_TIMEOUT_BASE_MILLIS + (FLOOD_SEND_TIMEOUT_FACTOR * pkt_airtime_millis);
   }
   uint32_t calcDirectTimeoutMillisFor(uint32_t pkt_airtime_millis, uint8_t path_len) const override {
+    uint8_t path_hash_count = path_len & 63;
     return SEND_TIMEOUT_BASE_MILLIS + 
-         ( (pkt_airtime_millis*DIRECT_SEND_PERHOP_FACTOR + DIRECT_SEND_PERHOP_EXTRA_MILLIS) * (path_len + 1));
+         ( (pkt_airtime_millis*DIRECT_SEND_PERHOP_FACTOR + DIRECT_SEND_PERHOP_EXTRA_MILLIS) * (path_hash_count + 1));
   }
 
   void onSendTimeout() override {
@@ -290,7 +291,7 @@ public:
   }
 
   float getFreqPref() const { return _prefs.freq; }
-  uint8_t getTxPowerPref() const { return _prefs.tx_power_dbm; }
+  int8_t getTxPowerPref() const { return _prefs.tx_power_dbm; }
 
   void begin(FILESYSTEM& fs) {
     _fs = &fs;
@@ -582,7 +583,9 @@ void setup() {
   the_mesh.showWelcome();
 
   // send out initial Advertisement to the mesh
+#if ENABLE_ADVERT_ON_BOOT == 1
   the_mesh.sendSelfAdvert(1200);   // add slight delay
+#endif
 }
 
 void loop() {

examples/simple_sensor/SensorMesh.cpp

@@ -258,10 +258,11 @@ void SensorMesh::sendAlert(const ClientInfo* c, Trigger* t) {
 
   auto pkt = createDatagram(PAYLOAD_TYPE_TXT_MSG, c->id, c->shared_secret, data, 5 + text_len);
   if (pkt) {
-    if (c->out_path_len >= 0) {  // we have an out_path, so send DIRECT
+    if (c->out_path_len != OUT_PATH_UNKNOWN) {  // we have an out_path, so send DIRECT
       sendDirect(pkt, c->out_path, c->out_path_len);
     } else {
-      sendFlood(pkt);
+      unsigned long delay_millis = 0;
+      sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
     }
   }
   t->send_expiry = futureMillis(ALERT_ACK_EXPIRY_MILLIS);
@@ -302,7 +303,7 @@ float SensorMesh::getAirtimeBudgetFactor() const {
 
 bool SensorMesh::allowPacketForward(const mesh::Packet* packet) {
   if (_prefs.disable_fwd) return false;
-  if (packet->isRouteFlood() && packet->path_len >= _prefs.flood_max) return false;
+  if (packet->isRouteFlood() && packet->getPathHashCount() >= _prefs.flood_max) return false;
   return true;
 }
 
@@ -312,11 +313,11 @@ int SensorMesh::calcRxDelay(float score, uint32_t air_time) const {
 }
 
 uint32_t SensorMesh::getRetransmitDelay(const mesh::Packet* packet) {
-  uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.tx_delay_factor);
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * _prefs.tx_delay_factor);
   return getRNG()->nextInt(0, 6)*t;
 }
 uint32_t SensorMesh::getDirectRetransmitDelay(const mesh::Packet* packet) {
-  uint32_t t = (_radio->getEstAirtimeFor(packet->path_len + packet->payload_len + 2) * _prefs.direct_tx_delay_factor);
+  uint32_t t = (_radio->getEstAirtimeFor(packet->getPathByteLen() + packet->payload_len + 2) * _prefs.direct_tx_delay_factor);
   return getRNG()->nextInt(0, 6)*t;
 }
 int SensorMesh::getInterferenceThreshold() const {
@@ -326,7 +327,7 @@ int SensorMesh::getAGCResetInterval() const {
   return ((int)_prefs.agc_reset_interval) * 4000;   // milliseconds
 }
 
-uint8_t SensorMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data) {
+uint8_t SensorMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data, bool is_flood) {
   ClientInfo* client;
   if (data[0] == 0) {   // blank password, just check if sender is in ACL
     client = acl.getClient(sender.pub_key, PUB_KEY_SIZE);
@@ -359,6 +360,10 @@ uint8_t SensorMesh::handleLoginReq(const mesh::Identity& sender, const uint8_t*
     dirty_contacts_expiry = futureMillis(LAZY_CONTACTS_WRITE_DELAY);
   }
 
+  if (is_flood) {
+    client->out_path_len = OUT_PATH_UNKNOWN;  // need to rediscover out_path
+  }
+
   uint32_t now = getRTCClock()->getCurrentTimeUnique();
   memcpy(reply_data, &now, 4);   // response packets always prefixed with timestamp
   reply_data[4] = RESP_SERVER_LOGIN_OK;
@@ -451,7 +456,7 @@ void SensorMesh::onAnonDataRecv(mesh::Packet* packet, const uint8_t* secret, con
     data[len] = 0;  // ensure null terminator
     uint8_t reply_len;
     if (data[4] == 0 || data[4] >= ' ') {   // is password, ie. a login request
-      reply_len = handleLoginReq(sender, secret, timestamp, &data[4]);
+      reply_len = handleLoginReq(sender, secret, timestamp, &data[4], packet->isRouteFlood());
     //} else if (data[4] == ANON_REQ_TYPE_*) {   // future type codes
       // TODO
     } else {
@@ -464,10 +469,10 @@ void SensorMesh::onAnonDataRecv(mesh::Packet* packet, const uint8_t* secret, con
       // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the response
       mesh::Packet* path = createPathReturn(sender, secret, packet->path, packet->path_len,
                                             PAYLOAD_TYPE_RESPONSE, reply_data, reply_len);
-      if (path) sendFlood(path, SERVER_RESPONSE_DELAY);
+      if (path) sendFlood(path, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
     } else {
       mesh::Packet* reply = createDatagram(PAYLOAD_TYPE_RESPONSE, sender, secret, reply_data, reply_len);
-      if (reply) sendFlood(reply, SERVER_RESPONSE_DELAY);
+      if (reply) sendFlood(reply, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
     }
   }
 }
@@ -492,10 +497,10 @@ void SensorMesh::getPeerSharedSecret(uint8_t* dest_secret, int peer_idx) {
   }
 }
 
-void SensorMesh::sendAckTo(const ClientInfo& dest, uint32_t ack_hash) {
-  if (dest.out_path_len < 0) {
+void SensorMesh::sendAckTo(const ClientInfo& dest, uint32_t ack_hash, uint8_t path_hash_size) {
+  if (dest.out_path_len == OUT_PATH_UNKNOWN) {
     mesh::Packet* ack = createAck(ack_hash);
-    if (ack) sendFlood(ack, TXT_ACK_DELAY);
+    if (ack) sendFlood(ack, TXT_ACK_DELAY, path_hash_size);
   } else {
     uint32_t d = TXT_ACK_DELAY;
     if (getExtraAckTransmitCount() > 0) {
@@ -533,14 +538,14 @@ void SensorMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender_i
         // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the response
         mesh::Packet* path = createPathReturn(from->id, secret, packet->path, packet->path_len,
                                               PAYLOAD_TYPE_RESPONSE, reply_data, reply_len);
-        if (path) sendFlood(path, SERVER_RESPONSE_DELAY);
+        if (path) sendFlood(path, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
       } else {
         mesh::Packet* reply = createDatagram(PAYLOAD_TYPE_RESPONSE, from->id, secret, reply_data, reply_len);
         if (reply) {
-          if (from->out_path_len >= 0) {  // we have an out_path, so send DIRECT
+          if (from->out_path_len != OUT_PATH_UNKNOWN) {  // we have an out_path, so send DIRECT
             sendDirect(reply, from->out_path, from->out_path_len, SERVER_RESPONSE_DELAY);
           } else {
-            sendFlood(reply, SERVER_RESPONSE_DELAY);
+            sendFlood(reply, SERVER_RESPONSE_DELAY, packet->getPathHashSize());
           }
         }
       }
@@ -550,7 +555,7 @@ void SensorMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender_i
   } else if (type == PAYLOAD_TYPE_TXT_MSG && len > 5 && from->isAdmin()) {   // a CLI command
     uint32_t sender_timestamp;
     memcpy(&sender_timestamp, data, 4);  // timestamp (by sender's RTC clock - which could be wrong)
-    uint flags = (data[4] >> 2);   // message attempt number, and other flags
+    uint8_t flags = (data[4] >> 2);   // message attempt number, and other flags
 
     if (sender_timestamp > from->last_timestamp) {  // prevent replay attacks
       if (flags == TXT_TYPE_PLAIN) {
@@ -563,9 +568,9 @@ void SensorMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender_i
             // let this sender know path TO here, so they can use sendDirect(), and ALSO encode the ACK
             mesh::Packet* path = createPathReturn(from->id, secret, packet->path, packet->path_len,
                                                   PAYLOAD_TYPE_ACK, (uint8_t *) &ack_hash, 4);
-            if (path) sendFlood(path, TXT_ACK_DELAY);
+            if (path) sendFlood(path, TXT_ACK_DELAY, packet->getPathHashSize());
           } else {
-            sendAckTo(*from, ack_hash);
+            sendAckTo(*from, ack_hash, packet->getPathHashSize());
           }
         }
       } else if (flags == TXT_TYPE_CLI_DATA) {  
@@ -592,8 +597,8 @@ void SensorMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender_i
 
           auto reply = createDatagram(PAYLOAD_TYPE_TXT_MSG, from->id, secret, temp, 5 + text_len);
           if (reply) {
-            if (from->out_path_len < 0) {
-              sendFlood(reply, CLI_REPLY_DELAY_MILLIS);
+            if (from->out_path_len == OUT_PATH_UNKNOWN) {
+              sendFlood(reply, CLI_REPLY_DELAY_MILLIS, packet->getPathHashSize());
             } else {
               sendDirect(reply, from->out_path, from->out_path_len, CLI_REPLY_DELAY_MILLIS);
             }
@@ -608,7 +613,7 @@ void SensorMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender_i
   }
 }
 
-bool SensorMesh::handleIncomingMsg(ClientInfo& from, uint32_t timestamp, uint8_t* data, uint flags, size_t len) {
+bool SensorMesh::handleIncomingMsg(ClientInfo& from, uint32_t timestamp, uint8_t* data, uint8_t flags, size_t len) {
   MESH_DEBUG_PRINT("handleIncomingMsg: unhandled msg from ");
   #ifdef MESH_DEBUG
   mesh::Utils::printHex(Serial, from.id.pub_key, PUB_KEY_SIZE);
@@ -662,7 +667,7 @@ bool SensorMesh::onPeerPathRecv(mesh::Packet* packet, int sender_idx, const uint
   MESH_DEBUG_PRINTLN("PATH to contact, path_len=%d", (uint32_t) path_len);
   // NOTE: for this impl, we just replace the current 'out_path' regardless, whenever sender sends us a new out_path.
   // FUTURE: could store multiple out_paths per contact, and try to find which is the 'best'(?)
-  memcpy(from->out_path, path, from->out_path_len = path_len);  // store a copy of path, for sendDirect()
+  from->out_path_len = mesh::Packet::copyPath(from->out_path, path, path_len);  // store a copy of path, for sendDirect()
   from->last_activity = getRTCClock()->getCurrentTime();
 
   // REVISIT: maybe make ALL out_paths non-persisted to minimise flash writes??
@@ -691,7 +696,7 @@ void SensorMesh::onAckRecv(mesh::Packet* packet, uint32_t ack_crc) {
 
 SensorMesh::SensorMesh(mesh::MainBoard& board, mesh::Radio& radio, mesh::MillisecondClock& ms, mesh::RNG& rng, mesh::RTCClock& rtc, mesh::MeshTables& tables)
      : mesh::Mesh(radio, ms, rng, rtc, *new StaticPoolPacketManager(32), tables),
-      _cli(board, rtc, sensors, &_prefs, this), telemetry(MAX_PACKET_PAYLOAD - 4)
+      _cli(board, rtc, sensors, acl, &_prefs, this), telemetry(MAX_PACKET_PAYLOAD - 4)
 {
   next_local_advert = next_flood_advert = 0;
   dirty_contacts_expiry = 0;
@@ -732,7 +737,7 @@ void SensorMesh::begin(FILESYSTEM* fs) {
   // load persisted prefs
   _cli.loadPrefs(_fs);
 
-  acl.load(_fs);
+  acl.load(_fs, self_id);
 
   radio_set_params(_prefs.freq, _prefs.bw, _prefs.sf, _prefs.cr);
   radio_set_tx_power(_prefs.tx_power_dbm);
@@ -740,6 +745,8 @@ void SensorMesh::begin(FILESYSTEM* fs) {
   updateAdvertTimer();
   updateFloodAdvertTimer();
 
+   board.setAdcMultiplier(_prefs.adc_multiplier);
+
 #if ENV_INCLUDE_GPS == 1
   applyGpsPrefs();
 #endif
@@ -759,7 +766,6 @@ bool SensorMesh::formatFileSystem() {
 }
 
 void SensorMesh::saveIdentity(const mesh::LocalIdentity& new_id) {
-  self_id = new_id;
 #if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   IdentityStore store(*_fs, "");
 #elif defined(ESP32)
@@ -769,7 +775,7 @@ void SensorMesh::saveIdentity(const mesh::LocalIdentity& new_id) {
 #else
   #error "need to define saveIdentity()"
 #endif
-  store.save("_main", self_id);
+  store.save("_main", new_id);
 }
 
 void SensorMesh::applyTempRadioParams(float freq, float bw, uint8_t sf, uint8_t cr, int timeout_mins) {
@@ -782,10 +788,14 @@ void SensorMesh::applyTempRadioParams(float freq, float bw, uint8_t sf, uint8_t
   revert_radio_at = futureMillis(2000 + timeout_mins*60*1000);   // schedule when to revert radio params
 }
 
-void SensorMesh::sendSelfAdvertisement(int delay_millis) {
+void SensorMesh::sendSelfAdvertisement(int delay_millis, bool flood) {
   mesh::Packet* pkt = createSelfAdvert();
   if (pkt) {
-    sendFlood(pkt, delay_millis);
+    if (flood) {
+      sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
+    } else {
+      sendZeroHop(pkt, delay_millis);
+    }
   } else {
     MESH_DEBUG_PRINTLN("ERROR: unable to create advertisement packet!");
   }
@@ -806,7 +816,7 @@ void SensorMesh::updateFloodAdvertTimer() {
   }
 }
 
-void SensorMesh::setTxPower(uint8_t power_dbm) {
+void SensorMesh::setTxPower(int8_t power_dbm) {
   radio_set_tx_power(power_dbm);
 }
 
@@ -859,7 +869,8 @@ void SensorMesh::loop() {
 
   if (next_flood_advert && millisHasNowPassed(next_flood_advert)) {
     mesh::Packet* pkt = createSelfAdvert();
-    if (pkt) sendFlood(pkt);
+    unsigned long delay_millis = 0;
+    if (pkt) sendFlood(pkt, delay_millis, _prefs.path_hash_mode + 1);
 
     updateFloodAdvertTimer();   // schedule next flood advert
     updateAdvertTimer();   // also schedule local advert (so they don't overlap)

examples/simple_sensor/SensorMesh.h

@@ -33,11 +33,11 @@
 #define PERM_RECV_ALERTS_HI    (1 << 7)   // high priority alerts
 
 #ifndef FIRMWARE_BUILD_DATE
-  #define FIRMWARE_BUILD_DATE   "13 Nov 2025"
+  #define FIRMWARE_BUILD_DATE   "15 Feb 2026"
 #endif
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.10.0"
+  #define FIRMWARE_VERSION   "v1.13.0"
 #endif
 
 #define FIRMWARE_ROLE "sensor"
@@ -60,13 +60,13 @@ public:
   NodePrefs* getNodePrefs() { return &_prefs; }
   void savePrefs() override { _cli.savePrefs(_fs); }
   bool formatFileSystem() override;
-  void sendSelfAdvertisement(int delay_millis) override;
+  void sendSelfAdvertisement(int delay_millis, bool flood) override;
   void updateAdvertTimer() override;
   void updateFloodAdvertTimer() override;
   void setLoggingOn(bool enable) override {  }
   void eraseLogFile() override { }
   void dumpLogFile() override { }
-  void setTxPower(uint8_t power_dbm) override;
+  void setTxPower(int8_t power_dbm) override;
   void formatNeighborsReply(char *reply) override {
     strcpy(reply, "not supported");
   }
@@ -127,15 +127,15 @@ protected:
   bool onPeerPathRecv(mesh::Packet* packet, int sender_idx, const uint8_t* secret, uint8_t* path, uint8_t path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len) override;
   void onControlDataRecv(mesh::Packet* packet) override;
   void onAckRecv(mesh::Packet* packet, uint32_t ack_crc) override;
-  virtual bool handleIncomingMsg(ClientInfo& from, uint32_t timestamp, uint8_t* data, uint flags, size_t len);
-  void sendAckTo(const ClientInfo& dest, uint32_t ack_hash);
+  virtual bool handleIncomingMsg(ClientInfo& from, uint32_t timestamp, uint8_t* data, uint8_t flags, size_t len);
+  void sendAckTo(const ClientInfo& dest, uint32_t ack_hash, uint8_t path_hash_size=1);
 private:
   FILESYSTEM* _fs;
   unsigned long next_local_advert, next_flood_advert;
   NodePrefs _prefs;
+  ClientACL  acl;
   CommonCLI _cli;
   uint8_t reply_data[MAX_PACKET_PAYLOAD];
-  ClientACL  acl;
   unsigned long dirty_contacts_expiry;
   CayenneLPP telemetry;
   uint32_t last_read_time;
@@ -148,7 +148,7 @@ private:
   uint8_t pending_sf;
   uint8_t pending_cr;
 
-  uint8_t handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data);
+  uint8_t handleLoginReq(const mesh::Identity& sender, const uint8_t* secret, uint32_t sender_timestamp, const uint8_t* data, bool is_flood);
   uint8_t handleRequest(uint8_t perms, uint32_t sender_timestamp, uint8_t req_type, uint8_t* payload, size_t payload_len);
   mesh::Packet* createSelfAdvert();
 

examples/simple_sensor/main.cpp

@@ -110,8 +110,10 @@ void setup() {
   ui_task.begin(the_mesh.getNodePrefs(), FIRMWARE_BUILD_DATE, FIRMWARE_VERSION);
 #endif
 
-  // send out initial Advertisement to the mesh
-  the_mesh.sendSelfAdvertisement(16000);
+  // send out initial zero hop Advertisement to the mesh
+#if ENABLE_ADVERT_ON_BOOT == 1
+  the_mesh.sendSelfAdvertisement(16000, false);
+#endif
 }
 
 void loop() {

platformio.ini

@@ -27,6 +27,7 @@ build_flags = -w -DNDEBUG -DRADIOLIB_STATIC_ONLY=1 -DRADIOLIB_GODMODE=1
   -D LORA_FREQ=869.525
   -D LORA_BW=250
   -D LORA_SF=11
+  -D ENABLE_ADVERT_ON_BOOT=1
   -D ENABLE_PRIVATE_KEY_IMPORT=1   ; NOTE: comment these out for more secure firmware
   -D ENABLE_PRIVATE_KEY_EXPORT=1
   -D RADIOLIB_EXCLUDE_CC1101=1
@@ -58,6 +59,7 @@ platform = platformio/espressif32@6.11.0
 monitor_filters = esp32_exception_decoder
 extra_scripts = merge-bin.py
 build_flags = ${arduino_base.build_flags}
+  -D ESP32_PLATFORM
 ;  -D ESP32_CPU_FREQ=80          ; change it to your need
 build_src_filter = ${arduino_base.build_src_filter}
 
@@ -67,10 +69,10 @@ lib_deps =
   file://arch/esp32/AsyncElegantOTA
 
 ; esp32c6 uses arduino framework 3.x
-; WARNING: experimental. pioarduino on esp32c6 needs work - it's not considered stable and has issues.
+; WARNING: experimental. May not work as stable as other platforms.
 [esp32c6_base]
 extends = esp32_base
-platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.12/platform-espressif32.zip
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.13-1/platform-espressif32.zip
 
 ; ----------------- NRF52 ---------------------
 
@@ -79,7 +81,9 @@ extends = arduino_base
 platform = nordicnrf52
 platform_packages =
   framework-arduinoadafruitnrf52 @ 1.10700.0
-extra_scripts = create-uf2.py
+extra_scripts =
+  create-uf2.py
+  arch/nrf52/extra_scripts/patch_bluefruit.py
 build_flags = ${arduino_base.build_flags}
   -D NRF52_PLATFORM
   -D LFS_NO_ASSERT=1

src/Dispatcher.cpp

@@ -68,7 +68,7 @@ void Dispatcher::loop() {
       next_tx_time = futureMillis(t * getAirtimeBudgetFactor());
 
       _radio->onSendFinished();
-      logTx(outbound, 2 + outbound->path_len + outbound->payload_len);
+      logTx(outbound, 2 + outbound->getPathByteLen() + outbound->payload_len);
       if (outbound->isRouteFlood()) {
         n_sent_flood++;
       } else {
@@ -80,7 +80,7 @@ void Dispatcher::loop() {
       MESH_DEBUG_PRINTLN("%s Dispatcher::loop(): WARNING: outbound packed send timed out!", getLogDateTime());
 
       _radio->onSendFinished();
-      logTxFail(outbound, 2 + outbound->path_len + outbound->payload_len);
+      logTxFail(outbound, 2 + outbound->getPathByteLen() + outbound->payload_len);
 
       releasePacket(outbound);  // return to pool
       outbound = NULL;
@@ -108,6 +108,48 @@ void Dispatcher::loop() {
   checkSend();
 }
 
+bool Dispatcher::tryParsePacket(Packet* pkt, const uint8_t* raw, int len) {
+  int i = 0;
+
+  pkt->header = raw[i++];
+  if (pkt->getPayloadVer() > PAYLOAD_VER_1) {
+    MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): unsupported packet version", getLogDateTime());
+    return false;
+  }
+
+  if (pkt->hasTransportCodes()) {
+    memcpy(&pkt->transport_codes[0], &raw[i], 2); i += 2;
+    memcpy(&pkt->transport_codes[1], &raw[i], 2); i += 2;
+  } else {
+    pkt->transport_codes[0] = pkt->transport_codes[1] = 0;
+  }
+
+  pkt->path_len = raw[i++];
+  uint8_t path_mode = pkt->path_len >> 6;  // upper 2 bits (legacy firmware: 00)
+  if (path_mode == 3) {   // Reserved for future
+    MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): unsupported path mode: 3", getLogDateTime());
+    return false;
+  }
+
+  uint8_t path_byte_len = (pkt->path_len & 63) * pkt->getPathHashSize();
+  if (path_byte_len > MAX_PATH_SIZE || i + path_byte_len > len) {
+    MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): partial or corrupt packet received, len=%d", getLogDateTime(), len);
+    return false;
+  }
+
+  memcpy(pkt->path, &raw[i], path_byte_len); i += path_byte_len;
+
+  pkt->payload_len = len - i;  // payload is remainder
+  if (pkt->payload_len > sizeof(pkt->payload)) {
+    MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): packet payload too big, payload_len=%d", getLogDateTime(), (uint32_t)pkt->payload_len);
+    return false;
+  }
+
+  memcpy(pkt->payload, &raw[i], pkt->payload_len);
+
+  return true;  // success
+}
+
 void Dispatcher::checkRecv() {
   Packet* pkt;
   float score;
@@ -122,45 +164,14 @@ void Dispatcher::checkRecv() {
       if (pkt == NULL) {
         MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): WARNING: received data, no unused packets available!", getLogDateTime());
       } else {
-        int i = 0;
-#ifdef NODE_ID
-        uint8_t sender_id = raw[i++];
-        if (sender_id == NODE_ID - 1 || sender_id == NODE_ID + 1) {  // simulate that NODE_ID can only hear NODE_ID-1 or NODE_ID+1, eg. 3 can't hear 1
+        if (tryParsePacket(pkt, raw, len)) {
+          pkt->_snr = _radio->getLastSNR() * 4.0f;
+          score = _radio->packetScore(_radio->getLastSNR(), len);
+          air_time = _radio->getEstAirtimeFor(len);
+          rx_air_time += air_time;
         } else {
-          _mgr->free(pkt);  // put back into pool
-          return;
-        }
-#endif
-
-        pkt->header = raw[i++];
-        if (pkt->hasTransportCodes()) {
-          memcpy(&pkt->transport_codes[0], &raw[i], 2); i += 2;
-          memcpy(&pkt->transport_codes[1], &raw[i], 2); i += 2;
-        } else {
-          pkt->transport_codes[0] = pkt->transport_codes[1] = 0;
-        }
-        pkt->path_len = raw[i++];
-
-        if (pkt->path_len > MAX_PATH_SIZE || i + pkt->path_len > len) {
-          MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): partial or corrupt packet received, len=%d", getLogDateTime(), len);
           _mgr->free(pkt);  // put back into pool
           pkt = NULL;
-        } else {
-          memcpy(pkt->path, &raw[i], pkt->path_len); i += pkt->path_len;
-
-          pkt->payload_len = len - i;  // payload is remainder
-          if (pkt->payload_len > sizeof(pkt->payload)) {
-            MESH_DEBUG_PRINTLN("%s Dispatcher::checkRecv(): packet payload too big, payload_len=%d", getLogDateTime(), (uint32_t)pkt->payload_len);
-            _mgr->free(pkt);  // put back into pool
-            pkt = NULL;  
-          } else {
-            memcpy(pkt->payload, &raw[i], pkt->payload_len);
-
-            pkt->_snr = _radio->getLastSNR() * 4.0f;
-            score = _radio->packetScore(_radio->getLastSNR(), len);
-            air_time = _radio->getEstAirtimeFor(len);
-            rx_air_time += air_time;
-          }
         }
       }
     } else {
@@ -249,16 +260,13 @@ void Dispatcher::checkSend() {
     int len = 0;
     uint8_t raw[MAX_TRANS_UNIT];
 
-#ifdef NODE_ID
-    raw[len++] = NODE_ID;
-#endif
     raw[len++] = outbound->header;
     if (outbound->hasTransportCodes()) {
       memcpy(&raw[len], &outbound->transport_codes[0], 2); len += 2;
       memcpy(&raw[len], &outbound->transport_codes[1], 2); len += 2;
     }
     raw[len++] = outbound->path_len;
-    memcpy(&raw[len], outbound->path, outbound->path_len); len += outbound->path_len;
+    len += Packet::writePath(&raw[len], outbound->path, outbound->path_len);
 
     if (len + outbound->payload_len > MAX_TRANS_UNIT) {
       MESH_DEBUG_PRINTLN("%s Dispatcher::checkSend(): FATAL: Invalid packet queued... too long, len=%d", getLogDateTime(), len + outbound->payload_len);
@@ -312,7 +320,7 @@ void Dispatcher::releasePacket(Packet* packet) {
 }
 
 void Dispatcher::sendPacket(Packet* packet, uint8_t priority, uint32_t delay_millis) {
-  if (packet->path_len > MAX_PATH_SIZE || packet->payload_len > MAX_PACKET_PAYLOAD) {
+  if (!Packet::isValidPathLen(packet->path_len) || packet->payload_len > MAX_PACKET_PAYLOAD) {
     MESH_DEBUG_PRINTLN("%s Dispatcher::sendPacket(): ERROR: invalid packet... path_len=%d, payload_len=%d", getLogDateTime(), (uint32_t) packet->path_len, (uint32_t) packet->payload_len);
     _mgr->free(packet);
   } else {

src/Dispatcher.h

@@ -184,6 +184,7 @@ public:
   unsigned long futureMillis(int millis_from_now) const;
 
 private:
+  bool tryParsePacket(Packet* pkt, const uint8_t* raw, int len);
   void checkRecv();
   void checkSend();
 };

src/Identity.cpp

@@ -48,6 +48,50 @@ LocalIdentity::LocalIdentity(RNG* rng) {
   ed25519_create_keypair(pub_key, prv_key, seed);
 }
 
+bool LocalIdentity::validatePrivateKey(const uint8_t prv[64]) {
+    uint8_t pub[32];
+    ed25519_derive_pub(pub, prv); // derive public key from given private key
+
+    // disallow 00 or FF prefixed public keys
+    if (pub[0] == 0x00 || pub[0] == 0xFF) return false;
+
+    // known good test client keypair
+    const uint8_t test_client_prv[64] = {
+      0x70, 0x65, 0xe1, 0x8f, 0xd9, 0xfa, 0xbb, 0x70,
+      0xc1, 0xed, 0x90, 0xdc, 0xa1, 0x99, 0x07, 0xde,
+      0x69, 0x8c, 0x88, 0xb7, 0x09, 0xea, 0x14, 0x6e,
+      0xaf, 0xd9, 0x3d, 0x9b, 0x83, 0x0c, 0x7b, 0x60,
+      0xc4, 0x68, 0x11, 0x93, 0xc7, 0x9b, 0xbc, 0x39,
+      0x94, 0x5b, 0xa8, 0x06, 0x41, 0x04, 0xbb, 0x61,
+      0x8f, 0x8f, 0xd7, 0xa8, 0x4a, 0x0a, 0xf6, 0xf5,
+      0x70, 0x33, 0xd6, 0xe8, 0xdd, 0xcd, 0x64, 0x71
+    };
+    const uint8_t test_client_pub[32] = {
+      0x1e, 0xc7, 0x71, 0x75, 0xb0, 0x91, 0x8e, 0xd2,
+      0x06, 0xf9, 0xae, 0x04, 0xec, 0x13, 0x6d, 0x6d,
+      0x5d, 0x43, 0x15, 0xbb, 0x26, 0x30, 0x54, 0x27,
+      0xf6, 0x45, 0xb4, 0x92, 0xe9, 0x35, 0x0c, 0x10
+    };
+
+    uint8_t ss1[32], ss2[32];
+
+    // shared secret we calculte from test client pubkey and given private key
+    ed25519_key_exchange(ss1, test_client_pub, prv);
+
+    // shared secret they calculate from our derived public key and test client private key
+    ed25519_key_exchange(ss2, pub, test_client_prv);
+
+    // check that both shared secrets match
+    if (memcmp(ss1, ss2, 32) != 0) return false;
+
+    // reject all-zero shared secret
+    for (int i = 0; i < 32; i++) {
+        if (ss1[i] != 0) return true;
+    }
+
+    return false;
+}
+
 bool LocalIdentity::readFrom(Stream& s) {
   bool success = (s.readBytes(pub_key, PUB_KEY_SIZE) == PUB_KEY_SIZE);
   success = success && (s.readBytes(prv_key, PRV_KEY_SIZE) == PRV_KEY_SIZE);

src/Identity.h

@@ -20,9 +20,16 @@ public:
     memcpy(dest, pub_key, PATH_HASH_SIZE);    // hash is just prefix of pub_key
     return PATH_HASH_SIZE;
   }
+  int copyHashTo(uint8_t* dest, uint8_t len) const { 
+    memcpy(dest, pub_key, len);    // hash is just prefix of pub_key
+    return len;
+  }
   bool isHashMatch(const uint8_t* hash) const {
     return memcmp(hash, pub_key, PATH_HASH_SIZE) == 0;
   }
+  bool isHashMatch(const uint8_t* hash, uint8_t len) const {
+    return memcmp(hash, pub_key, len) == 0;
+  }
 
   /**
    * \brief  Performs Ed25519 signature verification.
@@ -73,6 +80,13 @@ public:
   */
   void calcSharedSecret(uint8_t* secret, const uint8_t* other_pub_key) const;
 
+  /**
+   * \brief  Validates that a given private key can be used for ECDH / shared-secret operations.
+   * \param  prv IN - the private key to validate (must be PRV_KEY_SIZE bytes)
+   * \returns true, if the private key is valid for login.
+  */
+  static bool validatePrivateKey(const uint8_t prv[64]);
+
   bool readFrom(Stream& s);
   bool writeTo(Stream& s) const;
   void printTo(Stream& s) const;

src/Mesh.cpp

@@ -39,11 +39,6 @@ int Mesh::searchChannelsByHash(const uint8_t* hash, GroupChannel channels[], int
 }
 
 DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
-  if (pkt->getPayloadVer() > PAYLOAD_VER_1) {  // not supported in this firmware version
-    MESH_DEBUG_PRINTLN("%s Mesh::onRecvPacket(): unsupported packet version", getLogDateTime());
-    return ACTION_RELEASE;
-  }
-
   if (pkt->isRouteDirect() && pkt->getPayloadType() == PAYLOAD_TYPE_TRACE) {
     if (pkt->path_len < MAX_PATH_SIZE) {
       uint8_t i = 0;
@@ -52,14 +47,15 @@ DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
       uint32_t auth_code;
       memcpy(&auth_code, &pkt->payload[i], 4); i += 4;
       uint8_t flags = pkt->payload[i++];
+      uint8_t path_sz = flags & 0x03;  // NEW v1.11+: lower 2 bits is path hash size
 
       uint8_t len = pkt->payload_len - i;
-      if (pkt->path_len >= len) {   // TRACE has reached end of given path
+      uint8_t offset = pkt->path_len << path_sz;
+      if (offset >= len) {   // TRACE has reached end of given path
         onTraceRecv(pkt, trace_tag, auth_code, flags, pkt->path, &pkt->payload[i], len);
-      } else if (self_id.isHashMatch(&pkt->payload[i + pkt->path_len]) && allowPacketForward(pkt) && !_tables->hasSeen(pkt)) {
+      } else if (self_id.isHashMatch(&pkt->payload[i + offset], 1 << path_sz) && allowPacketForward(pkt) && !_tables->hasSeen(pkt)) {
         // append SNR (Not hash!)
-        pkt->path[pkt->path_len] = (int8_t) (pkt->getSNR()*4);
-        pkt->path_len += PATH_HASH_SIZE;
+        pkt->path[pkt->path_len++] = (int8_t) (pkt->getSNR()*4);
 
         uint32_t d = getDirectRetransmitDelay(pkt);
         return ACTION_RETRANSMIT_DELAYED(5, d);  // schedule with priority 5 (for now), maybe make configurable?
@@ -69,15 +65,25 @@ DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
   }
 
   if (pkt->isRouteDirect() && pkt->getPayloadType() == PAYLOAD_TYPE_CONTROL && (pkt->payload[0] & 0x80) != 0) {
-    if (pkt->path_len == 0) {
+    if (pkt->getPathHashCount() == 0) {
       onControlDataRecv(pkt);
     }
     // just zero-hop control packets allowed (for this subset of payloads)
     return ACTION_RELEASE;
   }
 
-  if (pkt->isRouteDirect() && pkt->path_len >= PATH_HASH_SIZE) {
-    if (self_id.isHashMatch(pkt->path) && allowPacketForward(pkt)) {
+  if (pkt->isRouteDirect() && pkt->getPathHashCount() > 0) {
+    // check for 'early received' ACK
+    if (pkt->getPayloadType() == PAYLOAD_TYPE_ACK) {
+      int i = 0;
+      uint32_t ack_crc;
+      memcpy(&ack_crc, &pkt->payload[i], 4); i += 4;
+      if (i <= pkt->payload_len) {
+        onAckRecv(pkt, ack_crc);
+      }
+    }
+
+    if (self_id.isHashMatch(pkt->path, pkt->getPathHashSize()) && allowPacketForward(pkt)) {
       if (pkt->getPayloadType() == PAYLOAD_TYPE_MULTIPART) {
         return forwardMultipartDirect(pkt);
       } else if (pkt->getPayloadType() == PAYLOAD_TYPE_ACK) {
@@ -147,7 +153,9 @@ DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
               if (pkt->getPayloadType() == PAYLOAD_TYPE_PATH) {
                 int k = 0;
                 uint8_t path_len = data[k++];
-                uint8_t* path = &data[k]; k += path_len;
+                uint8_t hash_size = (path_len >> 6) + 1;
+                uint8_t hash_count = path_len & 63;
+                uint8_t* path = &data[k]; k += hash_size*hash_count;
                 uint8_t extra_type = data[k++] & 0x0F;   // upper 4 bits reserved for future use
                 uint8_t* extra = &data[k];
                 uint8_t extra_len = len - k;   // remainder of packet (may be padded with zeroes!)
@@ -282,8 +290,7 @@ DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
         if (type == PAYLOAD_TYPE_ACK && pkt->payload_len >= 5) {    // a multipart ACK
           Packet tmp;
           tmp.header = pkt->header;
-          tmp.path_len = pkt->path_len;
-          memcpy(tmp.path, pkt->path, pkt->path_len);
+          tmp.path_len = Packet::copyPath(tmp.path, pkt->path, pkt->path_len);
           tmp.payload_len = pkt->payload_len - 1;
           memcpy(tmp.payload, &pkt->payload[1], tmp.payload_len);
 
@@ -310,27 +317,25 @@ DispatcherAction Mesh::onRecvPacket(Packet* pkt) {
 
 void Mesh::removeSelfFromPath(Packet* pkt) {
   // remove our hash from 'path'
-  pkt->path_len -= PATH_HASH_SIZE;
-#if 0
-  memcpy(pkt->path, &pkt->path[PATH_HASH_SIZE], pkt->path_len);
-#elif PATH_HASH_SIZE == 1
-  for (int k = 0; k < pkt->path_len; k++) {  // shuffle bytes by 1
-    pkt->path[k] = pkt->path[k + 1];
+  pkt->setPathHashCount(pkt->getPathHashCount() - 1);  // decrement the count
+
+  uint8_t sz = pkt->getPathHashSize();
+  for (int k = 0; k < pkt->getPathHashCount()*sz; k += sz) {  // shuffle path by 1 'entry'
+    memcpy(&pkt->path[k], &pkt->path[k + sz], sz);
   }
-#else
-  #error "need path remove impl"
-#endif
 }
 
 DispatcherAction Mesh::routeRecvPacket(Packet* packet) {
+  uint8_t n = packet->getPathHashCount();
   if (packet->isRouteFlood() && !packet->isMarkedDoNotRetransmit()
-    && packet->path_len + PATH_HASH_SIZE <= MAX_PATH_SIZE && allowPacketForward(packet)) {
+    && (n + 1)*packet->getPathHashSize() <= MAX_PATH_SIZE && allowPacketForward(packet)) {
     // append this node's hash to 'path'
-    packet->path_len += self_id.copyHashTo(&packet->path[packet->path_len]);
+    self_id.copyHashTo(&packet->path[n * packet->getPathHashSize()], packet->getPathHashSize());
+    packet->setPathHashCount(n + 1);
 
     uint32_t d = getRetransmitDelay(packet);
     // as this propagates outwards, give it lower and lower priority
-    return ACTION_RETRANSMIT_DELAYED(packet->path_len, d);   // give priority to closer sources, than ones further away
+    return ACTION_RETRANSMIT_DELAYED(packet->getPathHashCount(), d);   // give priority to closer sources, than ones further away
   }
   return ACTION_RELEASE;
 }
@@ -342,8 +347,7 @@ DispatcherAction Mesh::forwardMultipartDirect(Packet* pkt) {
   if (type == PAYLOAD_TYPE_ACK && pkt->payload_len >= 5) {    // a multipart ACK
     Packet tmp;
     tmp.header = pkt->header;
-    tmp.path_len = pkt->path_len;
-    memcpy(tmp.path, pkt->path, pkt->path_len);
+    tmp.path_len = Packet::copyPath(tmp.path, pkt->path, pkt->path_len);
     tmp.payload_len = pkt->payload_len - 1;
     memcpy(tmp.payload, &pkt->payload[1], tmp.payload_len);
 
@@ -365,7 +369,7 @@ void Mesh::routeDirectRecvAcks(Packet* packet, uint32_t delay_millis) {
       delay_millis += getDirectRetransmitDelay(packet) + 300;
       auto a1 = createMultiAck(crc, extra);
       if (a1) {
-        memcpy(a1->path, packet->path, a1->path_len = packet->path_len);
+        a1->path_len = Packet::copyPath(a1->path, packet->path, packet->path_len);
         a1->header &= ~PH_ROUTE_MASK;
         a1->header |= ROUTE_TYPE_DIRECT;
         sendPacket(a1, 0, delay_millis);
@@ -375,7 +379,7 @@ void Mesh::routeDirectRecvAcks(Packet* packet, uint32_t delay_millis) {
 
     auto a2 = createAck(crc);
     if (a2) {
-      memcpy(a2->path, packet->path, a2->path_len = packet->path_len);
+      a2->path_len = Packet::copyPath(a2->path, packet->path, packet->path_len);
       a2->header &= ~PH_ROUTE_MASK;
       a2->header |= ROUTE_TYPE_DIRECT;
       sendPacket(a2, 0, delay_millis);
@@ -428,7 +432,10 @@ Packet* Mesh::createPathReturn(const Identity& dest, const uint8_t* secret, cons
 }
 
 Packet* Mesh::createPathReturn(const uint8_t* dest_hash, const uint8_t* secret, const uint8_t* path, uint8_t path_len, uint8_t extra_type, const uint8_t*extra, size_t extra_len) {
-  if (path_len + extra_len + 5 > MAX_COMBINED_PATH) return NULL;  // too long!!
+  uint8_t path_hash_size = (path_len >> 6) + 1;
+  uint8_t path_hash_count = path_len & 63;
+
+  if (path_hash_count*path_hash_size + extra_len + 5 > MAX_COMBINED_PATH) return NULL;  // too long!!
 
   Packet* packet = obtainNewPacket();
   if (packet == NULL) {
@@ -446,7 +453,7 @@ Packet* Mesh::createPathReturn(const uint8_t* dest_hash, const uint8_t* secret,
     uint8_t data[MAX_PACKET_PAYLOAD];
 
     data[data_len++] = path_len;
-    memcpy(&data[data_len], path, path_len); data_len += path_len;
+    memcpy(&data[data_len], path, path_hash_count*path_hash_size); data_len += path_hash_count*path_hash_size;
     if (extra_len > 0) {
       data[data_len++] = extra_type;
       memcpy(&data[data_len], extra, extra_len); data_len += extra_len;
@@ -613,15 +620,19 @@ Packet* Mesh::createControlData(const uint8_t* data, size_t len) {
   return packet;
 }
 
-void Mesh::sendFlood(Packet* packet, uint32_t delay_millis) {
+void Mesh::sendFlood(Packet* packet, uint32_t delay_millis, uint8_t path_hash_size) {
   if (packet->getPayloadType() == PAYLOAD_TYPE_TRACE) {
     MESH_DEBUG_PRINTLN("%s Mesh::sendFlood(): TRACE type not suspported", getLogDateTime());
     return;
   }
+  if (path_hash_size == 0 || path_hash_size > 3) {
+    MESH_DEBUG_PRINTLN("%s Mesh::sendFlood(): invalid path_hash_size", getLogDateTime());
+    return;
+  }
 
   packet->header &= ~PH_ROUTE_MASK;
   packet->header |= ROUTE_TYPE_FLOOD;
-  packet->path_len = 0;
+  packet->setPathHashSizeAndCount(path_hash_size, 0);
 
   _tables->hasSeen(packet); // mark this packet as already sent in case it is rebroadcast back to us
 
@@ -636,17 +647,21 @@ void Mesh::sendFlood(Packet* packet, uint32_t delay_millis) {
   sendPacket(packet, pri, delay_millis);
 }
 
-void Mesh::sendFlood(Packet* packet, uint16_t* transport_codes, uint32_t delay_millis) {
+void Mesh::sendFlood(Packet* packet, uint16_t* transport_codes, uint32_t delay_millis, uint8_t path_hash_size) {
   if (packet->getPayloadType() == PAYLOAD_TYPE_TRACE) {
     MESH_DEBUG_PRINTLN("%s Mesh::sendFlood(): TRACE type not suspported", getLogDateTime());
     return;
   }
+  if (path_hash_size == 0 || path_hash_size > 3) {
+    MESH_DEBUG_PRINTLN("%s Mesh::sendFlood(): invalid path_hash_size", getLogDateTime());
+    return;
+  }
 
   packet->header &= ~PH_ROUTE_MASK;
   packet->header |= ROUTE_TYPE_TRANSPORT_FLOOD;
   packet->transport_codes[0] = transport_codes[0];
   packet->transport_codes[1] = transport_codes[1];
-  packet->path_len = 0;
+  packet->setPathHashSizeAndCount(path_hash_size, 0);
 
   _tables->hasSeen(packet); // mark this packet as already sent in case it is rebroadcast back to us
 
@@ -668,13 +683,13 @@ void Mesh::sendDirect(Packet* packet, const uint8_t* path, uint8_t path_len, uin
   uint8_t pri;
   if (packet->getPayloadType() == PAYLOAD_TYPE_TRACE) {   // TRACE packets are different
     // for TRACE packets, path is appended to end of PAYLOAD. (path is used for SNR's)
-    memcpy(&packet->payload[packet->payload_len], path, path_len);
+    memcpy(&packet->payload[packet->payload_len], path, path_len);  // NOTE: path_len here can be > 64, and NOT in the new scheme
     packet->payload_len += path_len;
 
     packet->path_len = 0;
     pri = 5;   // maybe make this configurable
   } else {
-    memcpy(packet->path, path, packet->path_len = path_len);
+    packet->path_len = Packet::copyPath(packet->path, path, path_len);
     if (packet->getPayloadType() == PAYLOAD_TYPE_PATH) {
       pri = 1;   // slightly less priority
     } else {

src/Mesh.h

@@ -196,13 +196,13 @@ public:
   /**
    * \brief  send a locally-generated Packet with flood routing
   */
-  void sendFlood(Packet* packet, uint32_t delay_millis=0);
+  void sendFlood(Packet* packet, uint32_t delay_millis=0, uint8_t path_hash_size=1);
 
   /**
    * \brief  send a locally-generated Packet with flood routing
    * \param transport_codes   array of 2 codes to attach to packet
   */
-  void sendFlood(Packet* packet, uint16_t* transport_codes, uint32_t delay_millis=0);
+  void sendFlood(Packet* packet, uint16_t* transport_codes, uint32_t delay_millis=0, uint8_t path_hash_size=1);
 
   /**
    * \brief  send a locally-generated Packet with Direct routing

src/MeshCore.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <math.h>
 
 #define MAX_HASH_SIZE        8
 #define PUB_KEY_SIZE        32
@@ -42,15 +43,28 @@ namespace mesh {
 class MainBoard {
 public:
   virtual uint16_t getBattMilliVolts() = 0;
+  virtual float getMCUTemperature() { return NAN; }
+  virtual bool setAdcMultiplier(float multiplier) { return false; };
+  virtual float getAdcMultiplier() const { return 0.0f; }
   virtual const char* getManufacturerName() const = 0;
   virtual void onBeforeTransmit() { }
   virtual void onAfterTransmit() { }
   virtual void reboot() = 0;
   virtual void powerOff() { /* no op */ }
+  virtual void sleep(uint32_t secs)  { /* no op */ }
   virtual uint32_t getGpio() { return 0; }
   virtual void setGpio(uint32_t values) {}
   virtual uint8_t getStartupReason() const = 0;
+  virtual bool getBootloaderVersion(char* version, size_t max_len) { return false; }
   virtual bool startOTAUpdate(const char* id, char reply[]) { return false; }   // not supported
+
+  // Power management interface (boards with power management override these)
+  virtual bool isExternalPowered() { return false; }
+  virtual uint16_t getBootVoltage() { return 0; }
+  virtual uint32_t getResetReason() const { return 0; }
+  virtual const char* getResetReasonString(uint32_t reason) { return "Not available"; }
+  virtual uint8_t getShutdownReason() const { return 0; }
+  virtual const char* getShutdownReasonString(uint8_t reason) { return "Not available"; }
 };
 
 /**

src/Packet.cpp

@@ -10,8 +10,32 @@ Packet::Packet() {
   payload_len = 0;
 }
 
+bool Packet::isValidPathLen(uint8_t path_len) {
+  uint8_t hash_count = path_len & 63;
+  uint8_t hash_size = (path_len >> 6) + 1;
+  if (hash_size == 4) return false;  // Reserved for future
+  return hash_count*hash_size <= MAX_PATH_SIZE;
+}
+
+size_t Packet::writePath(uint8_t* dest, const uint8_t* src, uint8_t path_len) {
+  uint8_t hash_count = path_len & 63;
+  uint8_t hash_size = (path_len >> 6) + 1;
+  size_t len = hash_count*hash_size;
+  if (len > MAX_PATH_SIZE) {
+    MESH_DEBUG_PRINTLN("Packet::copyPath, invalid path_len=%d", (uint32_t)path_len);
+    return 0;   // Error
+  }
+  memcpy(dest, src, len);
+  return len;
+}
+
+uint8_t Packet::copyPath(uint8_t* dest, const uint8_t* src, uint8_t path_len) {
+  writePath(dest, src, path_len);
+  return path_len;
+}
+
 int Packet::getRawLength() const {
-  return 2 + path_len + payload_len + (hasTransportCodes() ? 4 : 0);
+  return 2 + getPathByteLen() + payload_len + (hasTransportCodes() ? 4 : 0);
 }
 
 void Packet::calculatePacketHash(uint8_t* hash) const {

src/Packet.h

@@ -76,6 +76,16 @@ public:
    */
   uint8_t getPayloadVer() const { return (header >> PH_VER_SHIFT) & PH_VER_MASK; }
 
+  uint8_t getPathHashSize() const { return (path_len >> 6) + 1; }
+  uint8_t getPathHashCount() const { return path_len & 63; }
+  uint8_t getPathByteLen() const { return getPathHashCount() * getPathHashSize(); }
+  void setPathHashCount(uint8_t n) { path_len &= ~63; path_len |= n; }
+  void setPathHashSizeAndCount(uint8_t sz, uint8_t n) { path_len = ((sz - 1) << 6) | (n & 63); }
+
+  static uint8_t copyPath(uint8_t* dest, const uint8_t* src, uint8_t path_len);  // returns path_len
+  static size_t writePath(uint8_t* dest, const uint8_t* src, uint8_t path_len);  // returns byte length written
+  static bool isValidPathLen(uint8_t path_len);
+
   void markDoNotRetransmit() { header = 0xFF; }
   bool isMarkedDoNotRetransmit() const { return header == 0xFF; }
 

src/helpers/BaseChatMesh.cpp

@@ -39,7 +39,7 @@ mesh::Packet* BaseChatMesh::createSelfAdvert(const char* name, double lat, doubl
 }
 
 void BaseChatMesh::sendAckTo(const ContactInfo& dest, uint32_t ack_hash) {
-  if (dest.out_path_len < 0) {
+  if (dest.out_path_len == OUT_PATH_UNKNOWN) {
     mesh::Packet* ack = createAck(ack_hash);
     if (ack) sendFloodScoped(dest, ack, TXT_ACK_DELAY);
   } else {
@@ -55,6 +55,54 @@ void BaseChatMesh::sendAckTo(const ContactInfo& dest, uint32_t ack_hash) {
   }
 }
 
+void BaseChatMesh::bootstrapRTCfromContacts() {
+  uint32_t latest = 0;
+  for (int i = 0; i < num_contacts; i++) {
+    if (contacts[i].lastmod > latest) {
+      latest = contacts[i].lastmod;
+    }
+  }
+  if (latest != 0) {
+    getRTCClock()->setCurrentTime(latest + 1);
+  }
+}
+
+ContactInfo* BaseChatMesh::allocateContactSlot() {
+  if (num_contacts < MAX_CONTACTS) {
+    return &contacts[num_contacts++];
+  } else if (shouldOverwriteWhenFull()) {
+    // Find oldest non-favourite contact by oldest lastmod timestamp
+    int oldest_idx = -1;
+    uint32_t oldest_lastmod = 0xFFFFFFFF;
+    for (int i = 0; i < num_contacts; i++) {
+      bool is_favourite = (contacts[i].flags & 0x01) != 0;
+      if (!is_favourite && contacts[i].lastmod < oldest_lastmod) {
+        oldest_lastmod = contacts[i].lastmod;
+        oldest_idx = i;
+      }
+    }
+    if (oldest_idx >= 0) {
+      onContactOverwrite(contacts[oldest_idx].id.pub_key);
+      return &contacts[oldest_idx];
+    }
+  }
+  return NULL; // no space, no overwrite or all contacts are all favourites
+}
+
+void BaseChatMesh::populateContactFromAdvert(ContactInfo& ci, const mesh::Identity& id, const AdvertDataParser& parser, uint32_t timestamp) {
+  memset(&ci, 0, sizeof(ci));
+  ci.id = id;
+  ci.out_path_len = OUT_PATH_UNKNOWN;
+  StrHelper::strncpy(ci.name, parser.getName(), sizeof(ci.name));
+  ci.type = parser.getType();
+  if (parser.hasLatLon()) {
+    ci.gps_lat = parser.getIntLat();
+    ci.gps_lon = parser.getIntLon();
+  }
+  ci.last_advert_timestamp = timestamp;
+  ci.lastmod = getRTCClock()->getCurrentTime();
+}
+
 void BaseChatMesh::onAdvertRecv(mesh::Packet* packet, const mesh::Identity& id, uint32_t timestamp, const uint8_t* app_data, size_t app_data_len) {
   AdvertDataParser parser(app_data, app_data_len);
   if (!(parser.isValid() && parser.hasName())) {
@@ -83,53 +131,40 @@ void BaseChatMesh::onAdvertRecv(mesh::Packet* packet, const mesh::Identity& id,
     plen = packet->writeTo(temp_buf);
     packet->header = save;
   }
-  putBlobByKey(id.pub_key, PUB_KEY_SIZE, temp_buf, plen);
 
-  bool is_new = false;
+  bool is_new = false; // true = not in contacts[], false = exists in contacts[]
   if (from == NULL) {
-    if (!isAutoAddEnabled()) {
+    if (!shouldAutoAddContactType(parser.getType())) {
       ContactInfo ci;
-      memset(&ci, 0, sizeof(ci));
-      ci.id = id;
-      ci.out_path_len = -1;  // initially out_path is unknown
-      StrHelper::strncpy(ci.name, parser.getName(), sizeof(ci.name));
-      ci.type = parser.getType();
-      if (parser.hasLatLon()) {
-        ci.gps_lat = parser.getIntLat();
-        ci.gps_lon = parser.getIntLon();
-      }
-      ci.last_advert_timestamp = timestamp;
-      ci.lastmod = getRTCClock()->getCurrentTime();
+      populateContactFromAdvert(ci, id, parser, timestamp);
       onDiscoveredContact(ci, true, packet->path_len, packet->path);       // let UI know
       return;
     }
 
-    is_new = true;
-    if (num_contacts < MAX_CONTACTS) {
-      from = &contacts[num_contacts++];
-      from->id = id;
-      from->out_path_len = -1;  // initially out_path is unknown
-      from->gps_lat = 0;   // initially unknown GPS loc
-      from->gps_lon = 0;
-      from->sync_since = 0;
-
-      // only need to calculate the shared_secret once, for better performance
-      self_id.calcSharedSecret(from->shared_secret, id);
-    } else {
-      MESH_DEBUG_PRINTLN("onAdvertRecv: contacts table is full!");
+    from = allocateContactSlot();
+    if (from == NULL) {
+      ContactInfo ci;
+      populateContactFromAdvert(ci, id, parser, timestamp);
+      onDiscoveredContact(ci, true, packet->path_len, packet->path);
+      onContactsFull();
+      MESH_DEBUG_PRINTLN("onAdvertRecv: unable to allocate contact slot for new contact");
       return;
     }
+    
+    populateContactFromAdvert(*from, id, parser, timestamp);
+    from->sync_since = 0;
+    from->shared_secret_valid = false;
   }
-
   // update
-  StrHelper::strncpy(from->name, parser.getName(), sizeof(from->name));
-  from->type = parser.getType();
-  if (parser.hasLatLon()) {
-    from->gps_lat = parser.getIntLat();
-    from->gps_lon = parser.getIntLon();
-  }
-  from->last_advert_timestamp = timestamp;
-  from->lastmod = getRTCClock()->getCurrentTime();
+    putBlobByKey(id.pub_key, PUB_KEY_SIZE, temp_buf, plen);
+    StrHelper::strncpy(from->name, parser.getName(), sizeof(from->name));
+    from->type = parser.getType();
+    if (parser.hasLatLon()) {
+      from->gps_lat = parser.getIntLat();
+      from->gps_lon = parser.getIntLon();
+    }
+    from->last_advert_timestamp = timestamp;
+    from->lastmod = getRTCClock()->getCurrentTime();
 
   onDiscoveredContact(*from, is_new, packet->path_len, packet->path);       // let UI know
 }
@@ -147,8 +182,7 @@ int BaseChatMesh::searchPeersByHash(const uint8_t* hash) {
 void BaseChatMesh::getPeerSharedSecret(uint8_t* dest_secret, int peer_idx) {
   int i = matching_peer_indexes[peer_idx];
   if (i >= 0 && i < num_contacts) {
-    // lookup pre-calculated shared_secret
-    memcpy(dest_secret, contacts[i].shared_secret, PUB_KEY_SIZE);
+    memcpy(dest_secret, contacts[i].getSharedSecret(self_id), PUB_KEY_SIZE);
   } else {
     MESH_DEBUG_PRINTLN("getPeerSharedSecret: Invalid peer idx: %d", i);
   }
@@ -166,7 +200,7 @@ void BaseChatMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender
   if (type == PAYLOAD_TYPE_TXT_MSG && len > 5) {
     uint32_t timestamp;
     memcpy(&timestamp, data, 4);  // timestamp (by sender's RTC clock - which could be wrong)
-    uint flags = data[4] >> 2;   // message attempt number, and other flags
+    uint8_t flags = data[4] >> 2;   // message attempt number, and other flags
 
     // len can be > original length, but 'text' will be padded with zeroes
     data[len] = 0; // need to make a C string again, with null terminator
@@ -229,7 +263,7 @@ void BaseChatMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender
       } else {
         mesh::Packet* reply = createDatagram(PAYLOAD_TYPE_RESPONSE, from.id, secret, temp_buf, reply_len);
         if (reply) {
-          if (from.out_path_len >= 0) {  // we have an out_path, so send DIRECT
+          if (from.out_path_len != OUT_PATH_UNKNOWN) {  // we have an out_path, so send DIRECT
             sendDirect(reply, from.out_path, from.out_path_len, SERVER_RESPONSE_DELAY);
           } else {
             sendFloodScoped(from, reply, SERVER_RESPONSE_DELAY);
@@ -239,7 +273,7 @@ void BaseChatMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender
     }
   } else if (type == PAYLOAD_TYPE_RESPONSE && len > 0) {
     onContactResponse(from, data, len);
-    if (packet->isRouteFlood() && from.out_path_len >= 0) {
+    if (packet->isRouteFlood() && from.out_path_len != OUT_PATH_UNKNOWN) {
       // we have direct path, but other node is still sending flood response, so maybe they didn't receive reciprocal path properly(?)
       handleReturnPathRetry(from, packet->path, packet->path_len);
     }
@@ -261,7 +295,7 @@ bool BaseChatMesh::onPeerPathRecv(mesh::Packet* packet, int sender_idx, const ui
 bool BaseChatMesh::onContactPathRecv(ContactInfo& from, uint8_t* in_path, uint8_t in_path_len, uint8_t* out_path, uint8_t out_path_len, uint8_t extra_type, uint8_t* extra, uint8_t extra_len) {
   // NOTE: default impl, we just replace the current 'out_path' regardless, whenever sender sends us a new out_path.
   // FUTURE: could store multiple out_paths per contact, and try to find which is the 'best'(?)
-  memcpy(from.out_path, out_path, from.out_path_len = out_path_len);  // store a copy of path, for sendDirect()
+  from.out_path_len = mesh::Packet::copyPath(from.out_path, out_path, out_path_len);  // store a copy of path, for sendDirect()
   from.lastmod = getRTCClock()->getCurrentTime();
 
   onContactPathUpdated(from);
@@ -283,7 +317,7 @@ void BaseChatMesh::onAckRecv(mesh::Packet* packet, uint32_t ack_crc) {
     txt_send_timeout = 0;   // matched one we're waiting for, cancel timeout timer
     packet->markDoNotRetransmit();   // ACK was for this node, so don't retransmit
 
-    if (packet->isRouteFlood() && from->out_path_len >= 0) {
+    if (packet->isRouteFlood() && from->out_path_len != OUT_PATH_UNKNOWN) {
       // we have direct path, but other node is still sending flood, so maybe they didn't receive reciprocal path properly(?)
       handleReturnPathRetry(*from, packet->path, packet->path_len);
     }
@@ -293,7 +327,7 @@ void BaseChatMesh::onAckRecv(mesh::Packet* packet, uint32_t ack_crc) {
 void BaseChatMesh::handleReturnPathRetry(const ContactInfo& contact, const uint8_t* path, uint8_t path_len) {
   // NOTE: simplest impl is just to re-send a reciprocal return path to sender (DIRECTLY)
   //        override this method in various firmwares, if there's a better strategy
-  mesh::Packet* rpath = createPathReturn(contact.id, contact.shared_secret, path, path_len, 0, NULL, 0);
+  mesh::Packet* rpath = createPathReturn(contact.id, contact.getSharedSecret(self_id), path, path_len, 0, NULL, 0);
   if (rpath) sendDirect(rpath, contact.out_path, contact.out_path_len, 3000);   // 3 second delay
 }
 
@@ -342,7 +376,7 @@ mesh::Packet* BaseChatMesh::composeMsgPacket(const ContactInfo& recipient, uint3
     temp[len++] = attempt;  // hide attempt number at tail end of payload
   }
 
-  return createDatagram(PAYLOAD_TYPE_TXT_MSG, recipient.id, recipient.shared_secret, temp, len);
+  return createDatagram(PAYLOAD_TYPE_TXT_MSG, recipient.id, recipient.getSharedSecret(self_id), temp, len);
 }
 
 int  BaseChatMesh::sendMessage(const ContactInfo& recipient, uint32_t timestamp, uint8_t attempt, const char* text, uint32_t& expected_ack, uint32_t& est_timeout) {
@@ -352,7 +386,7 @@ int  BaseChatMesh::sendMessage(const ContactInfo& recipient, uint32_t timestamp,
   uint32_t t = _radio->getEstAirtimeFor(pkt->getRawLength());
 
   int rc;
-  if (recipient.out_path_len < 0) {
+  if (recipient.out_path_len == OUT_PATH_UNKNOWN) {
     sendFloodScoped(recipient, pkt);
     txt_send_timeout = futureMillis(est_timeout = calcFloodTimeoutMillisFor(t));
     rc = MSG_SEND_SENT_FLOOD;
@@ -373,12 +407,12 @@ int  BaseChatMesh::sendCommandData(const ContactInfo& recipient, uint32_t timest
   temp[4] = (attempt & 3) | (TXT_TYPE_CLI_DATA << 2);
   memcpy(&temp[5], text, text_len + 1);
 
-  auto pkt = createDatagram(PAYLOAD_TYPE_TXT_MSG, recipient.id, recipient.shared_secret, temp, 5 + text_len);
+  auto pkt = createDatagram(PAYLOAD_TYPE_TXT_MSG, recipient.id, recipient.getSharedSecret(self_id), temp, 5 + text_len);
   if (pkt == NULL) return MSG_SEND_FAILED;
 
   uint32_t t = _radio->getEstAirtimeFor(pkt->getRawLength());
   int rc;
-  if (recipient.out_path_len < 0) {
+  if (recipient.out_path_len == OUT_PATH_UNKNOWN) {
     sendFloodScoped(recipient, pkt);
     txt_send_timeout = futureMillis(est_timeout = calcFloodTimeoutMillisFor(t));
     rc = MSG_SEND_SENT_FLOOD;
@@ -462,11 +496,36 @@ int BaseChatMesh::sendLogin(const ContactInfo& recipient, const char* password,
       tlen = 4 + len;
     }
 
-    pkt = createAnonDatagram(PAYLOAD_TYPE_ANON_REQ, self_id, recipient.id, recipient.shared_secret, temp, tlen);
+    pkt = createAnonDatagram(PAYLOAD_TYPE_ANON_REQ, self_id, recipient.id, recipient.getSharedSecret(self_id), temp, tlen);
   }
   if (pkt) {
     uint32_t t = _radio->getEstAirtimeFor(pkt->getRawLength());
-    if (recipient.out_path_len < 0) {
+    if (recipient.out_path_len == OUT_PATH_UNKNOWN) {
+      sendFloodScoped(recipient, pkt);
+      est_timeout = calcFloodTimeoutMillisFor(t);
+      return MSG_SEND_SENT_FLOOD;
+    } else {
+      sendDirect(pkt, recipient.out_path, recipient.out_path_len);
+      est_timeout = calcDirectTimeoutMillisFor(t, recipient.out_path_len);
+      return MSG_SEND_SENT_DIRECT;
+    }
+  }
+  return MSG_SEND_FAILED;
+}
+
+int BaseChatMesh::sendAnonReq(const ContactInfo& recipient, const uint8_t* data, uint8_t len, uint32_t& tag, uint32_t& est_timeout) {
+  mesh::Packet* pkt;
+  {
+    uint8_t temp[MAX_PACKET_PAYLOAD];
+    tag = getRTCClock()->getCurrentTimeUnique();
+    memcpy(temp, &tag, 4);   // tag to match later (also extra blob to help make packet_hash unique)
+    memcpy(&temp[4], data, len);
+
+    pkt = createAnonDatagram(PAYLOAD_TYPE_ANON_REQ, self_id, recipient.id, recipient.getSharedSecret(self_id), temp, 4 + len);
+  }
+  if (pkt) {
+    uint32_t t = _radio->getEstAirtimeFor(pkt->getRawLength());
+    if (recipient.out_path_len == OUT_PATH_UNKNOWN) {
       sendFloodScoped(recipient, pkt);
       est_timeout = calcFloodTimeoutMillisFor(t);
       return MSG_SEND_SENT_FLOOD;
@@ -489,11 +548,11 @@ int  BaseChatMesh::sendRequest(const ContactInfo& recipient, const uint8_t* req_
     memcpy(temp, &tag, 4);   // mostly an extra blob to help make packet_hash unique
     memcpy(&temp[4], req_data, data_len);
 
-    pkt = createDatagram(PAYLOAD_TYPE_REQ, recipient.id, recipient.shared_secret, temp, 4 + data_len);
+    pkt = createDatagram(PAYLOAD_TYPE_REQ, recipient.id, recipient.getSharedSecret(self_id), temp, 4 + data_len);
   }
   if (pkt) {
     uint32_t t = _radio->getEstAirtimeFor(pkt->getRawLength());
-    if (recipient.out_path_len < 0) {
+    if (recipient.out_path_len == OUT_PATH_UNKNOWN) {
       sendFloodScoped(recipient, pkt);
       est_timeout = calcFloodTimeoutMillisFor(t);
       return MSG_SEND_SENT_FLOOD;
@@ -516,11 +575,11 @@ int  BaseChatMesh::sendRequest(const ContactInfo& recipient, uint8_t req_type, u
     memset(&temp[5], 0, 4);  // reserved (possibly for 'since' param)
     getRNG()->random(&temp[9], 4);   // random blob to help make packet-hash unique
 
-    pkt = createDatagram(PAYLOAD_TYPE_REQ, recipient.id, recipient.shared_secret, temp, sizeof(temp));
+    pkt = createDatagram(PAYLOAD_TYPE_REQ, recipient.id, recipient.getSharedSecret(self_id), temp, sizeof(temp));
   }
   if (pkt) {
     uint32_t t = _radio->getEstAirtimeFor(pkt->getRawLength());
-    if (recipient.out_path_len < 0) {
+    if (recipient.out_path_len == OUT_PATH_UNKNOWN) {
       sendFloodScoped(recipient, pkt);
       est_timeout = calcFloodTimeoutMillisFor(t);
       return MSG_SEND_SENT_FLOOD;
@@ -624,7 +683,7 @@ void BaseChatMesh::checkConnections() {
         MESH_DEBUG_PRINTLN("checkConnections(): Keep_alive contact not found!");
         continue;
       }
-      if (contact->out_path_len < 0) {
+      if (contact->out_path_len == OUT_PATH_UNKNOWN) {
         MESH_DEBUG_PRINTLN("checkConnections(): Keep_alive contact, no out_path!");
         continue;
       }
@@ -639,7 +698,7 @@ void BaseChatMesh::checkConnections() {
       // calc expected ACK reply
       mesh::Utils::sha256((uint8_t *)&connections[i].expected_ack, 4, data, 9, self_id.pub_key, PUB_KEY_SIZE);
 
-      auto pkt = createDatagram(PAYLOAD_TYPE_REQ, contact->id, contact->shared_secret, data, 9);
+      auto pkt = createDatagram(PAYLOAD_TYPE_REQ, contact->id, contact->getSharedSecret(self_id), data, 9);
       if (pkt) {
         sendDirect(pkt, contact->out_path, contact->out_path_len);
       }
@@ -651,7 +710,7 @@ void BaseChatMesh::checkConnections() {
 }
 
 void BaseChatMesh::resetPathTo(ContactInfo& recipient) {
-  recipient.out_path_len = -1;
+  recipient.out_path_len = OUT_PATH_UNKNOWN;
 }
 
 static ContactInfo* table;  // pass via global :-(
@@ -699,13 +758,10 @@ ContactInfo* BaseChatMesh::lookupContactByPubKey(const uint8_t* pub_key, int pre
 }
 
 bool BaseChatMesh::addContact(const ContactInfo& contact) {
-  if (num_contacts < MAX_CONTACTS) {
-    auto dest = &contacts[num_contacts++];
+  ContactInfo* dest = allocateContactSlot();
+  if (dest) {
     *dest = contact;
-
-    // calc the ECDH shared secret (just once for performance)
-    self_id.calcSharedSecret(dest->shared_secret, contact.id);
-
+    dest->shared_secret_valid = false; // mark shared_secret as needing calculation
     return true;  // success
   }
   return false;

src/helpers/BaseChatMesh.h

@@ -88,10 +88,17 @@ protected:
     memset(connections, 0, sizeof(connections));
   }
 
+  void bootstrapRTCfromContacts();
   void resetContacts() { num_contacts = 0; }
+  void populateContactFromAdvert(ContactInfo& ci, const mesh::Identity& id, const AdvertDataParser& parser, uint32_t timestamp);
+  ContactInfo* allocateContactSlot(); // helper to find slot for new contact
 
   // 'UI' concepts, for sub-classes to implement
   virtual bool isAutoAddEnabled() const { return true; }
+  virtual bool shouldAutoAddContactType(uint8_t type) const { return true; }
+  virtual void onContactsFull() {};
+  virtual bool shouldOverwriteWhenFull() const { return false; }
+  virtual void onContactOverwrite(const uint8_t* pub_key) {};
   virtual void onDiscoveredContact(ContactInfo& contact, bool is_new, uint8_t path_len, const uint8_t* path) = 0;
   virtual ContactInfo* processAck(const uint8_t *data) = 0;
   virtual void onContactPathUpdated(const ContactInfo& contact) = 0;
@@ -141,6 +148,7 @@ public:
   int  sendCommandData(const ContactInfo& recipient, uint32_t timestamp, uint8_t attempt, const char* text, uint32_t& est_timeout);
   bool sendGroupMessage(uint32_t timestamp, mesh::GroupChannel& channel, const char* sender_name, const char* text, int text_len);
   int  sendLogin(const ContactInfo& recipient, const char* password, uint32_t& est_timeout);
+  int  sendAnonReq(const ContactInfo& recipient, const uint8_t* data, uint8_t len, uint32_t& tag, uint32_t& est_timeout);
   int  sendRequest(const ContactInfo& recipient, uint8_t req_type, uint32_t& tag, uint32_t& est_timeout);
   int  sendRequest(const ContactInfo& recipient, const uint8_t* req_data, uint8_t data_len, uint32_t& tag, uint32_t& est_timeout);
   bool shareContactZeroHop(const ContactInfo& contact);

src/helpers/ClientACL.cpp

@@ -11,7 +11,8 @@ static File openWrite(FILESYSTEM* _fs, const char* filename) {
   #endif
 }
 
-void ClientACL::load(FILESYSTEM* _fs) {
+void ClientACL::load(FILESYSTEM* fs, const mesh::LocalIdentity& self_id) {
+  _fs = fs;
   num_clients = 0;
   if (_fs->exists("/s_contacts")) {
   #if defined(RP2040_PLATFORM)
@@ -34,11 +35,12 @@ void ClientACL::load(FILESYSTEM* _fs) {
         success = success && (file.read(unused, 2) == 2);
         success = success && (file.read((uint8_t *)&c.out_path_len, 1) == 1);
         success = success && (file.read(c.out_path, 64) == 64);
-        success = success && (file.read(c.shared_secret, PUB_KEY_SIZE) == PUB_KEY_SIZE);
+        success = success && (file.read(c.shared_secret, PUB_KEY_SIZE) == PUB_KEY_SIZE); // will be recalculated below
 
         if (!success) break; // EOF
 
         c.id = mesh::Identity(pub_key);
+        self_id.calcSharedSecret(c.shared_secret, pub_key);  // recalculate shared secrets in case our private key changed
         if (num_clients < MAX_CLIENTS) {
           clients[num_clients++] = c;
         } else {
@@ -50,7 +52,8 @@ void ClientACL::load(FILESYSTEM* _fs) {
   }
 }
 
-void ClientACL::save(FILESYSTEM* _fs, bool (*filter)(ClientInfo*)) {
+void ClientACL::save(FILESYSTEM* fs, bool (*filter)(ClientInfo*)) {
+  _fs = fs;
   File file = openWrite(_fs, "/s_contacts");
   if (file) {
     uint8_t unused[2];
@@ -74,6 +77,16 @@ void ClientACL::save(FILESYSTEM* _fs, bool (*filter)(ClientInfo*)) {
   }
 }
 
+bool ClientACL::clear() {
+  if (!_fs) return false; // no filesystem, nothing to clear
+  if (_fs->exists("/s_contacts")) {
+    _fs->remove("/s_contacts");
+  }
+  memset(clients, 0, sizeof(clients));
+  num_clients = 0;
+  return true;
+}
+
 ClientInfo* ClientACL::getClient(const uint8_t* pubkey, int key_len) {
   for (int i = 0; i < num_clients; i++) {
     if (memcmp(pubkey, clients[i].id.pub_key, key_len) == 0) return &clients[i];  // already known
@@ -101,7 +114,7 @@ ClientInfo* ClientACL::putClient(const mesh::Identity& id, uint8_t init_perms) {
   memset(c, 0, sizeof(*c));
   c->permissions = init_perms;
   c->id = id;
-  c->out_path_len = -1;  // initially out_path is unknown
+  c->out_path_len = OUT_PATH_UNKNOWN;
   return c;
 }
 

src/helpers/ClientACL.h

@@ -10,10 +10,12 @@
 #define PERM_ACL_READ_WRITE    2
 #define PERM_ACL_ADMIN         3
 
+#define OUT_PATH_UNKNOWN  0xFF
+
 struct ClientInfo {
   mesh::Identity id;
   uint8_t permissions;
-  int8_t out_path_len;
+  uint8_t out_path_len;
   uint8_t out_path[MAX_PATH_SIZE];
   uint8_t shared_secret[PUB_KEY_SIZE];
   uint32_t last_timestamp;   // by THEIR clock  (transient)
@@ -36,6 +38,7 @@ struct ClientInfo {
 #endif
 
 class ClientACL {
+  FILESYSTEM* _fs;
   ClientInfo clients[MAX_CLIENTS];
   int num_clients;
 
@@ -44,8 +47,9 @@ public:
     memset(clients, 0, sizeof(clients));
     num_clients = 0;
   }
-  void load(FILESYSTEM* _fs);
+  void load(FILESYSTEM* _fs, const mesh::LocalIdentity& self_id);
   void save(FILESYSTEM* _fs, bool (*filter)(ClientInfo*)=NULL);
+  bool clear();
 
   ClientInfo* getClient(const uint8_t* pubkey, int key_len);
   ClientInfo* putClient(const mesh::Identity& id, uint8_t init_perms);

src/helpers/CommonCLI.cpp

@@ -14,6 +14,14 @@ static uint32_t _atoi(const char* sp) {
   return n;
 }
 
+static bool isValidName(const char *n) {
+  while (*n) {
+    if (*n == '[' || *n == ']' || *n == '\\' || *n == ':' || *n == ',' || *n == '?' || *n == '*') return false;
+    n++;
+  }
+  return true;
+}
+
 void CommonCLI::loadPrefs(FILESYSTEM* fs) {
   if (fs->exists("/com_prefs")) {
     loadPrefsInt(fs, "/com_prefs");   // new filename
@@ -55,7 +63,8 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     file.read((uint8_t *)&_prefs->multi_acks, sizeof(_prefs->multi_acks));                         // 115
     file.read((uint8_t *)&_prefs->bw, sizeof(_prefs->bw));                                         // 116
     file.read((uint8_t *)&_prefs->agc_reset_interval, sizeof(_prefs->agc_reset_interval));         // 120
-    file.read(pad, 3);                                                                             // 121
+    file.read((uint8_t *)&_prefs->path_hash_mode, sizeof(_prefs->path_hash_mode));                 // 121
+    file.read(pad, 2);                                                                             // 122
     file.read((uint8_t *)&_prefs->flood_max, sizeof(_prefs->flood_max));                           // 124
     file.read((uint8_t *)&_prefs->flood_advert_interval, sizeof(_prefs->flood_advert_interval));   // 125
     file.read((uint8_t *)&_prefs->interference_threshold, sizeof(_prefs->interference_threshold)); // 126
@@ -65,12 +74,15 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     file.read((uint8_t *)&_prefs->bridge_baud, sizeof(_prefs->bridge_baud));                       // 131
     file.read((uint8_t *)&_prefs->bridge_channel, sizeof(_prefs->bridge_channel));                 // 135
     file.read((uint8_t *)&_prefs->bridge_secret, sizeof(_prefs->bridge_secret));                   // 136
-    file.read(pad, 4);                                                                             // 152
+    file.read((uint8_t *)&_prefs->powersaving_enabled, sizeof(_prefs->powersaving_enabled));       // 152
+    file.read(pad, 3);                                                                             // 153
     file.read((uint8_t *)&_prefs->gps_enabled, sizeof(_prefs->gps_enabled));                       // 156
     file.read((uint8_t *)&_prefs->gps_interval, sizeof(_prefs->gps_interval));                     // 157
     file.read((uint8_t *)&_prefs->advert_loc_policy, sizeof (_prefs->advert_loc_policy));          // 161
     file.read((uint8_t *)&_prefs->discovery_mod_timestamp, sizeof(_prefs->discovery_mod_timestamp)); // 162
-    // 166
+    file.read((uint8_t *)&_prefs->adc_multiplier, sizeof(_prefs->adc_multiplier)); // 166
+    file.read((uint8_t *)_prefs->owner_info, sizeof(_prefs->owner_info));  // 170
+    // 290
 
     // sanitise bad pref values
     _prefs->rx_delay_base = constrain(_prefs->rx_delay_base, 0, 20.0f);
@@ -81,8 +93,10 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     _prefs->bw = constrain(_prefs->bw, 7.8f, 500.0f);
     _prefs->sf = constrain(_prefs->sf, 5, 12);
     _prefs->cr = constrain(_prefs->cr, 5, 8);
-    _prefs->tx_power_dbm = constrain(_prefs->tx_power_dbm, 1, 30);
+    _prefs->tx_power_dbm = constrain(_prefs->tx_power_dbm, -9, 30);
     _prefs->multi_acks = constrain(_prefs->multi_acks, 0, 1);
+    _prefs->adc_multiplier = constrain(_prefs->adc_multiplier, 0.0f, 10.0f);
+    _prefs->path_hash_mode = constrain(_prefs->path_hash_mode, 0, 2);   // NOTE: mode 3 reserved for future
 
     // sanitise bad bridge pref values
     _prefs->bridge_enabled = constrain(_prefs->bridge_enabled, 0, 1);
@@ -91,6 +105,8 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     _prefs->bridge_baud = constrain(_prefs->bridge_baud, 9600, 115200);
     _prefs->bridge_channel = constrain(_prefs->bridge_channel, 0, 14);
 
+    _prefs->powersaving_enabled = constrain(_prefs->powersaving_enabled, 0, 1);
+
     _prefs->gps_enabled = constrain(_prefs->gps_enabled, 0, 1);
     _prefs->advert_loc_policy = constrain(_prefs->advert_loc_policy, 0, 2);
 
@@ -133,7 +149,8 @@ void CommonCLI::savePrefs(FILESYSTEM* fs) {
     file.write((uint8_t *)&_prefs->multi_acks, sizeof(_prefs->multi_acks));                         // 115
     file.write((uint8_t *)&_prefs->bw, sizeof(_prefs->bw));                                         // 116
     file.write((uint8_t *)&_prefs->agc_reset_interval, sizeof(_prefs->agc_reset_interval));         // 120
-    file.write(pad, 3);                                                                             // 121
+    file.write((uint8_t *)&_prefs->path_hash_mode, sizeof(_prefs->path_hash_mode));                 // 121
+    file.write(pad, 2);                                                                             // 122
     file.write((uint8_t *)&_prefs->flood_max, sizeof(_prefs->flood_max));                           // 124
     file.write((uint8_t *)&_prefs->flood_advert_interval, sizeof(_prefs->flood_advert_interval));   // 125
     file.write((uint8_t *)&_prefs->interference_threshold, sizeof(_prefs->interference_threshold)); // 126
@@ -143,12 +160,15 @@ void CommonCLI::savePrefs(FILESYSTEM* fs) {
     file.write((uint8_t *)&_prefs->bridge_baud, sizeof(_prefs->bridge_baud));                       // 131
     file.write((uint8_t *)&_prefs->bridge_channel, sizeof(_prefs->bridge_channel));                 // 135
     file.write((uint8_t *)&_prefs->bridge_secret, sizeof(_prefs->bridge_secret));                   // 136
-    file.write(pad, 4);                                                                             // 152
+    file.write((uint8_t *)&_prefs->powersaving_enabled, sizeof(_prefs->powersaving_enabled));       // 152
+    file.write(pad, 3);                                                                             // 153
     file.write((uint8_t *)&_prefs->gps_enabled, sizeof(_prefs->gps_enabled));                       // 156
     file.write((uint8_t *)&_prefs->gps_interval, sizeof(_prefs->gps_interval));                     // 157
     file.write((uint8_t *)&_prefs->advert_loc_policy, sizeof(_prefs->advert_loc_policy));           // 161
     file.write((uint8_t *)&_prefs->discovery_mod_timestamp, sizeof(_prefs->discovery_mod_timestamp)); // 162
-    // 166
+    file.write((uint8_t *)&_prefs->adc_multiplier, sizeof(_prefs->adc_multiplier));                 // 166
+    file.write((uint8_t *)_prefs->owner_info, sizeof(_prefs->owner_info));  // 170
+    // 290
 
     file.close();
   }
@@ -179,8 +199,13 @@ uint8_t CommonCLI::buildAdvertData(uint8_t node_type, uint8_t* app_data) {
 void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, char* reply) {
     if (memcmp(command, "reboot", 6) == 0) {
       _board->reboot();  // doesn't return
+    } else if (memcmp(command, "clkreboot", 9) == 0) {
+      // Reset clock
+      getRTCClock()->setCurrentTime(1715770351);  // 15 May 2024, 8:50pm
+      _board->reboot();  // doesn't return
     } else if (memcmp(command, "advert", 6) == 0) {
-      _callbacks->sendSelfAdvertisement(1500);  // longer delay, give CLI response time to be sent first
+      // send flood advert
+      _callbacks->sendSelfAdvertisement(1500, true);  // longer delay, give CLI response time to be sent first
       strcpy(reply, "OK - Advert sent");
     } else if (memcmp(command, "clock sync", 10) == 0) {
       uint32_t curr = getRTCClock()->getCurrentTime();
@@ -228,12 +253,12 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
       strcpy(tmp, &command[10]);
       const char *parts[5];
       int num = mesh::Utils::parseTextParts(tmp, parts, 5);
-      float freq  = num > 0 ? atof(parts[0]) : 0.0f;
-      float bw    = num > 1 ? atof(parts[1]) : 0.0f;
+      float freq  = num > 0 ? strtof(parts[0], nullptr) : 0.0f;
+      float bw    = num > 1 ? strtof(parts[1], nullptr) : 0.0f;
       uint8_t sf  = num > 2 ? atoi(parts[2]) : 0;
       uint8_t cr  = num > 3 ? atoi(parts[3]) : 0;
       int temp_timeout_mins  = num > 4 ? atoi(parts[4]) : 0;
-      if (freq >= 300.0f && freq <= 2500.0f && sf >= 7 && sf <= 12 && cr >= 5 && cr <= 8 && bw >= 7.0f && bw <= 500.0f && temp_timeout_mins > 0) {
+      if (freq >= 300.0f && freq <= 2500.0f && sf >= 5 && sf <= 12 && cr >= 5 && cr <= 8 && bw >= 7.0f && bw <= 500.0f && temp_timeout_mins > 0) {
         _callbacks->applyTempRadioParams(freq, bw, sf, cr, temp_timeout_mins);
         sprintf(reply, "OK - temp params for %d mins", temp_timeout_mins);
       } else {
@@ -284,7 +309,7 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
       } else if (memcmp(config, "radio", 5) == 0) {
         char freq[16], bw[16];
         strcpy(freq, StrHelper::ftoa(_prefs->freq));
-        strcpy(bw, StrHelper::ftoa(_prefs->bw));
+        strcpy(bw, StrHelper::ftoa3(_prefs->bw));
         sprintf(reply, "> %s,%s,%d,%d", freq, bw, (uint32_t)_prefs->sf, (uint32_t)_prefs->cr);
       } else if (memcmp(config, "rxdelay", 7) == 0) {
         sprintf(reply, "> %s", StrHelper::ftoa(_prefs->rx_delay_base));
@@ -294,8 +319,19 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         sprintf(reply, "> %d", (uint32_t)_prefs->flood_max);
       } else if (memcmp(config, "direct.txdelay", 14) == 0) {
         sprintf(reply, "> %s", StrHelper::ftoa(_prefs->direct_tx_delay_factor));
+      } else if (memcmp(config, "owner.info", 10) == 0) {
+        *reply++ = '>';
+        *reply++ = ' ';
+        const char* sp = _prefs->owner_info;
+        while (*sp) {
+          *reply++ = (*sp == '\n') ? '|' : *sp;    // translate newline back to orig '|'
+          sp++;
+        }
+        *reply = 0;  // set null terminator
+      } else if (memcmp(config, "path.hash.mode", 14) == 0) {
+        sprintf(reply, "> %d", (uint32_t)_prefs->path_hash_mode);
       } else if (memcmp(config, "tx", 2) == 0 && (config[2] == 0 || config[2] == ' ')) {
-        sprintf(reply, "> %d", (uint32_t) _prefs->tx_power_dbm);
+        sprintf(reply, "> %d", (int32_t) _prefs->tx_power_dbm);
       } else if (memcmp(config, "freq", 4) == 0) {
         sprintf(reply, "> %s", StrHelper::ftoa(_prefs->freq));
       } else if (memcmp(config, "public.key", 10) == 0) {
@@ -330,6 +366,51 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         sprintf(reply, "> %d", (uint32_t)_prefs->bridge_channel);
       } else if (memcmp(config, "bridge.secret", 13) == 0) {
         sprintf(reply, "> %s", _prefs->bridge_secret);
+#endif
+      } else if (memcmp(config, "bootloader.ver", 14) == 0) {
+      #ifdef NRF52_PLATFORM
+          char ver[32];
+          if (_board->getBootloaderVersion(ver, sizeof(ver))) {
+              sprintf(reply, "> %s", ver);
+          } else {
+              strcpy(reply, "> unknown");
+          }
+      #else
+          strcpy(reply, "ERROR: unsupported");
+      #endif
+      } else if (memcmp(config, "adc.multiplier", 14) == 0) {
+        float adc_mult = _board->getAdcMultiplier();
+        if (adc_mult == 0.0f) {
+          strcpy(reply, "Error: unsupported by this board");
+        } else {
+          sprintf(reply, "> %.3f", adc_mult);
+        }
+      // Power management commands
+      } else if (memcmp(config, "pwrmgt.support", 14) == 0) {
+#ifdef NRF52_POWER_MANAGEMENT
+        strcpy(reply, "> supported");
+#else
+        strcpy(reply, "> unsupported");
+#endif
+      } else if (memcmp(config, "pwrmgt.source", 13) == 0) {
+#ifdef NRF52_POWER_MANAGEMENT
+        strcpy(reply, _board->isExternalPowered() ? "> external" : "> battery");
+#else
+        strcpy(reply, "ERROR: Power management not supported");
+#endif
+      } else if (memcmp(config, "pwrmgt.bootreason", 17) == 0) {
+#ifdef NRF52_POWER_MANAGEMENT
+        sprintf(reply, "> Reset: %s; Shutdown: %s",
+          _board->getResetReasonString(_board->getResetReason()),
+          _board->getShutdownReasonString(_board->getShutdownReason()));
+#else
+        strcpy(reply, "ERROR: Power management not supported");
+#endif
+      } else if (memcmp(config, "pwrmgt.bootmv", 13) == 0) {
+#ifdef NRF52_POWER_MANAGEMENT
+        sprintf(reply, "> %u mV", _board->getBootVoltage());
+#else
+        strcpy(reply, "ERROR: Power management not supported");
 #endif
       } else {
         sprintf(reply, "??: %s", config);
@@ -361,8 +442,8 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         strcpy(reply, "OK");
       } else if (memcmp(config, "flood.advert.interval ", 22) == 0) {
         int hours = _atoi(&config[22]);
-        if ((hours > 0 && hours < 3) || (hours > 48)) {
-          strcpy(reply, "Error: interval range is 3-48 hours");
+        if ((hours > 0 && hours < 3) || (hours > 168)) {
+          strcpy(reply, "Error: interval range is 3-168 hours");
         } else {
           _prefs->flood_advert_interval = (uint8_t)(hours);
           _callbacks->updateFloodAdvertTimer();
@@ -383,22 +464,27 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         StrHelper::strncpy(_prefs->guest_password, &config[15], sizeof(_prefs->guest_password));
         savePrefs();
         strcpy(reply, "OK");
-      } else if (sender_timestamp == 0 &&
-                 memcmp(config, "prv.key ", 8) == 0) { // from serial command line only
+      } else if (memcmp(config, "prv.key ", 8) == 0) {
         uint8_t prv_key[PRV_KEY_SIZE];
         bool success = mesh::Utils::fromHex(prv_key, PRV_KEY_SIZE, &config[8]);
-        if (success) {
+        // only allow rekey if key is valid
+        if (success && mesh::LocalIdentity::validatePrivateKey(prv_key)) {
           mesh::LocalIdentity new_id;
           new_id.readFrom(prv_key, PRV_KEY_SIZE);
           _callbacks->saveIdentity(new_id);
-          strcpy(reply, "OK");
+          strcpy(reply, "OK, reboot to apply! New pubkey: ");
+          mesh::Utils::toHex(&reply[33], new_id.pub_key, PUB_KEY_SIZE);
         } else {
-          strcpy(reply, "Error, invalid key");
+          strcpy(reply, "Error, bad key");
         }
       } else if (memcmp(config, "name ", 5) == 0) {
-        StrHelper::strncpy(_prefs->node_name, &config[5], sizeof(_prefs->node_name));
-        savePrefs();
-        strcpy(reply, "OK");
+        if (isValidName(&config[5])) {
+          StrHelper::strncpy(_prefs->node_name, &config[5], sizeof(_prefs->node_name));
+          savePrefs();
+          strcpy(reply, "OK");
+        } else {
+          strcpy(reply, "Error, bad chars");
+        }
       } else if (memcmp(config, "repeat ", 7) == 0) {
         _prefs->disable_fwd = memcmp(&config[7], "off", 3) == 0;
         savePrefs();
@@ -407,11 +493,11 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         strcpy(tmp, &config[6]);
         const char *parts[4];
         int num = mesh::Utils::parseTextParts(tmp, parts, 4);
-        float freq  = num > 0 ? atof(parts[0]) : 0.0f;
-        float bw    = num > 1 ? atof(parts[1]) : 0.0f;
+        float freq  = num > 0 ? strtof(parts[0], nullptr) : 0.0f;
+        float bw    = num > 1 ? strtof(parts[1], nullptr) : 0.0f;
         uint8_t sf  = num > 2 ? atoi(parts[2]) : 0;
         uint8_t cr  = num > 3 ? atoi(parts[3]) : 0;
-        if (freq >= 300.0f && freq <= 2500.0f && sf >= 7 && sf <= 12 && cr >= 5 && cr <= 8 && bw >= 7.0f && bw <= 500.0f) {
+        if (freq >= 300.0f && freq <= 2500.0f && sf >= 5 && sf <= 12 && cr >= 5 && cr <= 8 && bw >= 7.0f && bw <= 500.0f) {
           _prefs->sf = sf;
           _prefs->cr = cr;
           _prefs->freq = freq;
@@ -465,6 +551,26 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         } else {
           strcpy(reply, "Error, cannot be negative");
         }
+      } else if (memcmp(config, "owner.info ", 11) == 0) {
+        config += 11;
+        char *dp = _prefs->owner_info;
+        while (*config && dp - _prefs->owner_info < sizeof(_prefs->owner_info)-1) {
+          *dp++ = (*config == '|') ? '\n' : *config;    // translate '|' to newline chars
+          config++;
+        }
+        *dp = 0;
+        savePrefs();
+        strcpy(reply, "OK");
+      } else if (memcmp(config, "path.hash.mode ", 15) == 0) {
+        config += 15;
+        uint8_t mode = atoi(config);
+        if (mode < 3) {
+          _prefs->path_hash_mode = mode;
+          savePrefs();
+          strcpy(reply, "OK");
+        } else {
+          strcpy(reply, "Error, must be 0,1, or 2");
+        }
       } else if (memcmp(config, "tx ", 3) == 0) {
         _prefs->tx_power_dbm = atoi(&config[3]);
         savePrefs();
@@ -523,6 +629,19 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         savePrefs();
         strcpy(reply, "OK");
 #endif
+      } else if (memcmp(config, "adc.multiplier ", 15) == 0) {
+        _prefs->adc_multiplier = atof(&config[15]);
+        if (_board->setAdcMultiplier(_prefs->adc_multiplier)) {
+          savePrefs();
+          if (_prefs->adc_multiplier == 0.0f) {
+            strcpy(reply, "OK - using default board multiplier");
+          } else {
+            sprintf(reply, "OK - multiplier set to %.3f", _prefs->adc_multiplier);
+          }
+        } else {
+          _prefs->adc_multiplier = 0.0f;
+          strcpy(reply, "Error: unsupported by this board");
+        };
       } else {
         sprintf(reply, "unknown config: %s", config);
       }
@@ -653,6 +772,20 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         strcpy(reply, "Can't find GPS");
       }
 #endif
+    } else if (memcmp(command, "powersaving on", 14) == 0) {
+      _prefs->powersaving_enabled = 1;
+      savePrefs();
+      strcpy(reply, "ok"); // TODO: to return Not supported if required
+    } else if (memcmp(command, "powersaving off", 15) == 0) {
+      _prefs->powersaving_enabled = 0;
+      savePrefs();
+      strcpy(reply, "ok");
+    } else if (memcmp(command, "powersaving", 11) == 0) {
+      if (_prefs->powersaving_enabled) {
+        strcpy(reply, "on");
+      } else {
+        strcpy(reply, "off");
+      }
     } else if (memcmp(command, "log start", 9) == 0) {
       _callbacks->setLoggingOn(true);
       strcpy(reply, "   logging on");

src/helpers/CommonCLI.h

@@ -3,6 +3,7 @@
 #include "Mesh.h"
 #include <helpers/IdentityStore.h>
 #include <helpers/SensorManager.h>
+#include <helpers/ClientACL.h>
 
 #if defined(WITH_RS232_BRIDGE) || defined(WITH_ESPNOW_BRIDGE)
 #define WITH_BRIDGE
@@ -18,7 +19,7 @@ struct NodePrefs { // persisted to file
   double node_lat, node_lon;
   char password[16];
   float freq;
-  uint8_t tx_power_dbm;
+  int8_t tx_power_dbm;
   uint8_t disable_fwd;
   uint8_t advert_interval;       // minutes / 2
   uint8_t flood_advert_interval; // hours
@@ -42,11 +43,16 @@ struct NodePrefs { // persisted to file
   uint32_t bridge_baud;   // 9600, 19200, 38400, 57600, 115200 (default 115200)
   uint8_t bridge_channel; // 1-14 (ESP-NOW only)
   char bridge_secret[16]; // for XOR encryption of bridge packets (ESP-NOW only)
+  // Power setting
+  uint8_t powersaving_enabled; // boolean
   // Gps settings
   uint8_t gps_enabled;
   uint32_t gps_interval; // in seconds
   uint8_t advert_loc_policy;
   uint32_t discovery_mod_timestamp;
+  float adc_multiplier;
+  char owner_info[120];
+  uint8_t path_hash_mode;   // which path mode to use when sending
 };
 
 class CommonCLICallbacks {
@@ -56,13 +62,13 @@ public:
   virtual const char* getBuildDate() = 0;
   virtual const char* getRole() = 0;
   virtual bool formatFileSystem() = 0;
-  virtual void sendSelfAdvertisement(int delay_millis) = 0;
+  virtual void sendSelfAdvertisement(int delay_millis, bool flood) = 0;
   virtual void updateAdvertTimer() = 0;
   virtual void updateFloodAdvertTimer() = 0;
   virtual void setLoggingOn(bool enable) = 0;
   virtual void eraseLogFile() = 0;
   virtual void dumpLogFile() = 0;
-  virtual void setTxPower(uint8_t power_dbm) = 0;
+  virtual void setTxPower(int8_t power_dbm) = 0;
   virtual void formatNeighborsReply(char *reply) = 0;
   virtual void removeNeighbor(const uint8_t* pubkey, int key_len) {
     // no op by default
@@ -90,6 +96,7 @@ class CommonCLI {
   CommonCLICallbacks* _callbacks;
   mesh::MainBoard* _board;
   SensorManager* _sensors;
+  ClientACL* _acl;
   char tmp[PRV_KEY_SIZE*2 + 4];
 
   mesh::RTCClock* getRTCClock() { return _rtc; }
@@ -97,8 +104,8 @@ class CommonCLI {
   void loadPrefsInt(FILESYSTEM* _fs, const char* filename);
 
 public:
-  CommonCLI(mesh::MainBoard& board, mesh::RTCClock& rtc, SensorManager& sensors, NodePrefs* prefs, CommonCLICallbacks* callbacks)
-      : _board(&board), _rtc(&rtc), _sensors(&sensors), _prefs(prefs), _callbacks(callbacks) { }
+  CommonCLI(mesh::MainBoard& board, mesh::RTCClock& rtc, SensorManager& sensors, ClientACL& acl, NodePrefs* prefs, CommonCLICallbacks* callbacks)
+      : _board(&board), _rtc(&rtc), _sensors(&sensors), _acl(&acl), _prefs(prefs), _callbacks(callbacks) { }
 
   void loadPrefs(FILESYSTEM* _fs);
   void savePrefs(FILESYSTEM* _fs);

src/helpers/ContactInfo.h

@@ -3,16 +3,29 @@
 #include <Arduino.h>
 #include <Mesh.h>
 
+#define OUT_PATH_UNKNOWN   0xFF
+
 struct ContactInfo {
   mesh::Identity id;
   char name[32];
   uint8_t type;   // on of ADV_TYPE_*
   uint8_t flags;
-  int8_t out_path_len;
+  uint8_t out_path_len;
+  mutable bool shared_secret_valid; // flag to indicate if shared_secret has been calculated
   uint8_t out_path[MAX_PATH_SIZE];
   uint32_t last_advert_timestamp;   // by THEIR clock
-  uint8_t shared_secret[PUB_KEY_SIZE];
   uint32_t lastmod;  // by OUR clock
   int32_t gps_lat, gps_lon;    // 6 dec places
   uint32_t sync_since;
+
+  const uint8_t* getSharedSecret(const mesh::LocalIdentity& self_id) const {
+    if (!shared_secret_valid) {
+      self_id.calcSharedSecret(shared_secret, id.pub_key);
+      shared_secret_valid = true;
+    }
+    return shared_secret;
+  }
+
+private:
+  mutable uint8_t shared_secret[PUB_KEY_SIZE];
 };

src/helpers/ESP32Board.cpp

@@ -11,6 +11,7 @@
 #include <SPIFFS.h>
 
 bool ESP32Board::startOTAUpdate(const char* id, char reply[]) {
+  inhibit_sleep = true;   // prevent sleep during OTA
   WiFi.softAP("MeshCore-OTA", NULL);
 
   sprintf(reply, "Started: http://%s/update", WiFi.softAPIP().toString().c_str());

src/helpers/ESP32Board.h

@@ -8,10 +8,12 @@
 #include <rom/rtc.h>
 #include <sys/time.h>
 #include <Wire.h>
+#include "driver/rtc_io.h"
 
 class ESP32Board : public mesh::MainBoard {
 protected:
   uint8_t startup_reason;
+  bool inhibit_sleep = false;
 
 public:
   void begin() {
@@ -42,6 +44,39 @@ public:
   #endif
   }
 
+  // Temperature from ESP32 MCU
+  float getMCUTemperature() override {
+    uint32_t raw = 0;
+
+    // To get and average the temperature so it is more accurate, especially in low temperature
+    for (int i = 0; i < 4; i++) {
+      raw += temperatureRead();
+    }
+
+    return raw / 4;
+  }
+
+  void enterLightSleep(uint32_t secs) {
+#if defined(CONFIG_IDF_TARGET_ESP32S3) && defined(P_LORA_DIO_1) // Supported ESP32 variants
+    if (rtc_gpio_is_valid_gpio((gpio_num_t)P_LORA_DIO_1)) { // Only enter sleep mode if P_LORA_DIO_1 is RTC pin
+      esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
+      esp_sleep_enable_ext1_wakeup((1L << P_LORA_DIO_1), ESP_EXT1_WAKEUP_ANY_HIGH); // To wake up when receiving a LoRa packet
+
+      if (secs > 0) {
+        esp_sleep_enable_timer_wakeup(secs * 1000000); // To wake up every hour to do periodically jobs
+      }
+
+      esp_light_sleep_start(); // CPU enters light sleep
+    }
+#endif
+  }
+
+  void sleep(uint32_t secs) override {
+    if (!inhibit_sleep) {
+      enterLightSleep(secs);      // To wake up after "secs" seconds or when receiving a LoRa packet
+    }
+  }
+
   uint8_t getStartupReason() const override { return startup_reason; }
 
 #if defined(P_LORA_TX_LED)
@@ -87,6 +122,10 @@ public:
   }
 
   bool startOTAUpdate(const char* id, char reply[]) override;
+
+  void setInhibitSleep(bool inhibit) {
+    inhibit_sleep = inhibit;
+  }
 };
 
 class ESP32RTCClock : public mesh::RTCClock {

src/helpers/NRF52Board.cpp

@@ -0,0 +1,366 @@
+#if defined(NRF52_PLATFORM)
+#include "NRF52Board.h"
+
+#include <bluefruit.h>
+#include <nrf_soc.h>
+
+static BLEDfu bledfu;
+
+static void connect_callback(uint16_t conn_handle) {
+  (void)conn_handle;
+  MESH_DEBUG_PRINTLN("BLE client connected");
+}
+
+static void disconnect_callback(uint16_t conn_handle, uint8_t reason) {
+  (void)conn_handle;
+  (void)reason;
+
+  MESH_DEBUG_PRINTLN("BLE client disconnected");
+}
+
+void NRF52Board::begin() {
+  startup_reason = BD_STARTUP_NORMAL;
+}
+
+#ifdef NRF52_POWER_MANAGEMENT
+#include "nrf.h"
+
+// Power Management global variables
+uint32_t g_nrf52_reset_reason = 0;     // Reset/Startup reason
+uint8_t g_nrf52_shutdown_reason = 0;   // Shutdown reason
+
+// Early constructor - runs before SystemInit() clears the registers
+// Priority 101 ensures this runs before SystemInit (102) and before
+// any C++ static constructors (default 65535)
+static void __attribute__((constructor(101))) nrf52_early_reset_capture() {
+  g_nrf52_reset_reason = NRF_POWER->RESETREAS;
+  g_nrf52_shutdown_reason = NRF_POWER->GPREGRET2;
+}
+
+void NRF52Board::initPowerMgr() {
+  // Copy early-captured register values
+  reset_reason = g_nrf52_reset_reason;
+  shutdown_reason = g_nrf52_shutdown_reason;
+  boot_voltage_mv = 0;  // Will be set by checkBootVoltage()
+
+  // Clear registers for next boot
+  // Note: At this point SoftDevice may or may not be enabled
+  uint8_t sd_enabled = 0;
+  sd_softdevice_is_enabled(&sd_enabled);
+  if (sd_enabled) {
+    sd_power_reset_reason_clr(0xFFFFFFFF);
+    sd_power_gpregret_clr(1, 0xFF);
+  } else {
+    NRF_POWER->RESETREAS = 0xFFFFFFFF;  // Write 1s to clear
+    NRF_POWER->GPREGRET2 = 0;
+  }
+
+  // Log reset/shutdown info
+  if (shutdown_reason != SHUTDOWN_REASON_NONE) {
+    MESH_DEBUG_PRINTLN("PWRMGT: Reset = %s (0x%lX); Shutdown = %s (0x%02X)",
+      getResetReasonString(reset_reason), (unsigned long)reset_reason,
+      getShutdownReasonString(shutdown_reason), shutdown_reason);
+  } else {
+    MESH_DEBUG_PRINTLN("PWRMGT: Reset = %s (0x%lX)",
+      getResetReasonString(reset_reason), (unsigned long)reset_reason);
+  }
+}
+
+bool NRF52Board::isExternalPowered() {
+  // Check if SoftDevice is enabled before using its API
+  uint8_t sd_enabled = 0;
+  sd_softdevice_is_enabled(&sd_enabled);
+
+  if (sd_enabled) {
+    uint32_t usb_status;
+    sd_power_usbregstatus_get(&usb_status);
+    return (usb_status & POWER_USBREGSTATUS_VBUSDETECT_Msk) != 0;
+  } else {
+    return (NRF_POWER->USBREGSTATUS & POWER_USBREGSTATUS_VBUSDETECT_Msk) != 0;
+  }
+}
+
+const char* NRF52Board::getResetReasonString(uint32_t reason) {
+  if (reason & POWER_RESETREAS_RESETPIN_Msk) return "Reset Pin";
+  if (reason & POWER_RESETREAS_DOG_Msk) return "Watchdog";
+  if (reason & POWER_RESETREAS_SREQ_Msk) return "Soft Reset";
+  if (reason & POWER_RESETREAS_LOCKUP_Msk) return "CPU Lockup";
+  #ifdef POWER_RESETREAS_LPCOMP_Msk
+    if (reason & POWER_RESETREAS_LPCOMP_Msk) return "Wake from LPCOMP";
+  #endif
+  #ifdef POWER_RESETREAS_VBUS_Msk
+    if (reason & POWER_RESETREAS_VBUS_Msk) return "Wake from VBUS";
+  #endif
+  #ifdef POWER_RESETREAS_OFF_Msk
+    if (reason & POWER_RESETREAS_OFF_Msk) return "Wake from GPIO";
+  #endif
+  #ifdef POWER_RESETREAS_DIF_Msk
+    if (reason & POWER_RESETREAS_DIF_Msk) return "Debug Interface";
+  #endif
+  return "Cold Boot";
+}
+
+const char* NRF52Board::getShutdownReasonString(uint8_t reason) {
+  switch (reason) {
+    case SHUTDOWN_REASON_LOW_VOLTAGE:  return "Low Voltage";
+    case SHUTDOWN_REASON_USER:         return "User Request";
+    case SHUTDOWN_REASON_BOOT_PROTECT: return "Boot Protection";
+  }
+  return "Unknown";
+}
+
+bool NRF52Board::checkBootVoltage(const PowerMgtConfig* config) {
+  initPowerMgr();
+
+  // Read boot voltage
+  boot_voltage_mv = getBattMilliVolts();
+  
+  if (config->voltage_bootlock == 0) return true;  // Protection disabled
+
+  // Skip check if externally powered
+  if (isExternalPowered()) {
+    MESH_DEBUG_PRINTLN("PWRMGT: Boot check skipped (external power)");
+    boot_voltage_mv = getBattMilliVolts();
+    return true;
+  }
+
+  MESH_DEBUG_PRINTLN("PWRMGT: Boot voltage = %u mV (threshold = %u mV)",
+      boot_voltage_mv, config->voltage_bootlock);
+
+  // Only trigger shutdown if reading is valid (>1000mV) AND below threshold
+  // This prevents spurious shutdowns on ADC glitches or uninitialized reads
+  if (boot_voltage_mv > 1000 && boot_voltage_mv < config->voltage_bootlock) {
+    MESH_DEBUG_PRINTLN("PWRMGT: Boot voltage too low - entering protective shutdown");
+
+    initiateShutdown(SHUTDOWN_REASON_BOOT_PROTECT);
+    return false;  // Should never reach this
+  }
+
+  return true;
+}
+
+void NRF52Board::initiateShutdown(uint8_t reason) {
+  enterSystemOff(reason);
+}
+
+void NRF52Board::enterSystemOff(uint8_t reason) {
+  MESH_DEBUG_PRINTLN("PWRMGT: Entering SYSTEMOFF (%s)", getShutdownReasonString(reason));
+
+  // Record shutdown reason in GPREGRET2
+  uint8_t sd_enabled = 0;
+  sd_softdevice_is_enabled(&sd_enabled);
+  if (sd_enabled) {
+    sd_power_gpregret_clr(1, 0xFF);
+    sd_power_gpregret_set(1, reason);
+  } else {
+    NRF_POWER->GPREGRET2 = reason;
+  }
+
+  // Flush serial buffers
+  Serial.flush();
+  delay(100);
+
+  // Enter SYSTEMOFF
+  if (sd_enabled) {
+    uint32_t err = sd_power_system_off();
+    if (err == NRF_ERROR_SOFTDEVICE_NOT_ENABLED) {  //SoftDevice not enabled
+      sd_enabled = 0;
+    }
+  }
+
+  if (!sd_enabled) {
+    // SoftDevice not available; write directly to POWER->SYSTEMOFF
+    NRF_POWER->SYSTEMOFF = POWER_SYSTEMOFF_SYSTEMOFF_Enter;
+  }
+
+  // If we get here, something went wrong. Reset to recover.
+  NVIC_SystemReset();
+}
+
+void NRF52Board::configureVoltageWake(uint8_t ain_channel, uint8_t refsel) {
+  // LPCOMP is not managed by SoftDevice - direct register access required
+  // Halt and disable before reconfiguration
+  NRF_LPCOMP->TASKS_STOP = 1;
+  NRF_LPCOMP->ENABLE = LPCOMP_ENABLE_ENABLE_Disabled;
+
+  // Select analog input (AIN0-7 maps to PSEL 0-7)
+  NRF_LPCOMP->PSEL = ((uint32_t)ain_channel << LPCOMP_PSEL_PSEL_Pos) & LPCOMP_PSEL_PSEL_Msk;
+
+  // Reference: REFSEL (0-6=1/8..7/8, 7=ARef, 8-15=1/16..15/16)
+  NRF_LPCOMP->REFSEL = ((uint32_t)refsel << LPCOMP_REFSEL_REFSEL_Pos) & LPCOMP_REFSEL_REFSEL_Msk;
+
+  // Detect UP events (voltage rises above threshold for battery recovery)
+  NRF_LPCOMP->ANADETECT = LPCOMP_ANADETECT_ANADETECT_Up;
+
+  // Enable 50mV hysteresis for noise immunity
+  NRF_LPCOMP->HYST = LPCOMP_HYST_HYST_Hyst50mV;
+
+  // Clear stale events/interrupts before enabling wake
+  NRF_LPCOMP->EVENTS_READY = 0;
+  NRF_LPCOMP->EVENTS_DOWN = 0;
+  NRF_LPCOMP->EVENTS_UP = 0;
+  NRF_LPCOMP->EVENTS_CROSS = 0;
+
+  NRF_LPCOMP->INTENCLR = 0xFFFFFFFF;
+  NRF_LPCOMP->INTENSET = LPCOMP_INTENSET_UP_Msk;
+
+  // Enable LPCOMP
+  NRF_LPCOMP->ENABLE = LPCOMP_ENABLE_ENABLE_Enabled;
+  NRF_LPCOMP->TASKS_START = 1;
+
+  // Wait for comparator to settle before entering SYSTEMOFF
+  for (uint8_t i = 0; i < 20 && !NRF_LPCOMP->EVENTS_READY; i++) {
+    delayMicroseconds(50);
+  }
+
+  if (refsel == 7) {
+    MESH_DEBUG_PRINTLN("PWRMGT: LPCOMP wake configured (AIN%d, ref=ARef)", ain_channel);
+  } else if (refsel <= 6) {
+    MESH_DEBUG_PRINTLN("PWRMGT: LPCOMP wake configured (AIN%d, ref=%d/8 VDD)",
+      ain_channel, refsel + 1);
+  } else {
+    uint8_t ref_num = (uint8_t)((refsel - 8) * 2 + 1);
+    MESH_DEBUG_PRINTLN("PWRMGT: LPCOMP wake configured (AIN%d, ref=%d/16 VDD)",
+      ain_channel, ref_num);
+  }
+
+  // Configure VBUS (USB power) wake alongside LPCOMP
+  uint8_t sd_enabled = 0;
+  sd_softdevice_is_enabled(&sd_enabled);
+  if (sd_enabled) {
+    sd_power_usbdetected_enable(1);
+  } else {
+    NRF_POWER->EVENTS_USBDETECTED = 0;
+    NRF_POWER->INTENSET = POWER_INTENSET_USBDETECTED_Msk;
+  }
+
+  MESH_DEBUG_PRINTLN("PWRMGT: VBUS wake configured");
+}
+#endif
+
+void NRF52BoardDCDC::begin() {
+  NRF52Board::begin();
+
+  // Enable DC/DC converter for improved power efficiency
+  uint8_t sd_enabled = 0;
+  sd_softdevice_is_enabled(&sd_enabled);
+  if (sd_enabled) {
+    sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
+  } else {
+    NRF_POWER->DCDCEN = 1;
+  }
+}
+
+void NRF52Board::sleep(uint32_t secs) {
+  // Clear FPU interrupt flags to avoid insomnia
+  // see errata 87 for details https://docs.nordicsemi.com/bundle/errata_nRF52840_Rev3/page/ERR/nRF52840/Rev3/latest/anomaly_840_87.html
+  #if (__FPU_USED == 1)
+  __set_FPSCR(__get_FPSCR() & ~(0x0000009F)); 
+  (void) __get_FPSCR();
+  NVIC_ClearPendingIRQ(FPU_IRQn);
+  #endif
+
+  // On nRF52, we use event-driven sleep instead of timed sleep
+  // The 'secs' parameter is ignored - we wake on any interrupt
+  uint8_t sd_enabled = 0;
+  sd_softdevice_is_enabled(&sd_enabled);
+
+  if (sd_enabled) {
+    // first call processes pending softdevice events, second call sleeps.
+    sd_app_evt_wait();
+    sd_app_evt_wait();
+  } else {
+    // softdevice is disabled, use raw WFE
+    __SEV();
+    __WFE();
+    __WFE();
+  }
+}
+
+// Temperature from NRF52 MCU
+float NRF52Board::getMCUTemperature() {
+  NRF_TEMP->TASKS_START = 1; // Start temperature measurement
+
+  long startTime = millis();  
+  while (NRF_TEMP->EVENTS_DATARDY == 0) { // Wait for completion. Should complete in 50us
+    if(millis() - startTime > 5) {  // To wait 5ms just in case
+      NRF_TEMP->TASKS_STOP = 1;
+      return NAN;
+    }
+  }
+  
+  NRF_TEMP->EVENTS_DATARDY = 0; // Clear event flag
+
+  int32_t temp = NRF_TEMP->TEMP; // In 0.25 *C units
+  NRF_TEMP->TASKS_STOP = 1;
+
+  return temp * 0.25f; // Convert to *C
+}
+
+bool NRF52Board::getBootloaderVersion(char* out, size_t max_len) {
+    static const char BOOTLOADER_MARKER[] = "UF2 Bootloader ";
+    const uint8_t* flash = (const uint8_t*)0x000FB000; // earliest known info.txt location is 0xFB90B, latest is 0xFCC4B
+
+    for (uint32_t i = 0; i < 0x3000 - (sizeof(BOOTLOADER_MARKER) - 1); i++) {
+        if (memcmp(&flash[i], BOOTLOADER_MARKER, sizeof(BOOTLOADER_MARKER) - 1) == 0) {
+            const char* ver = (const char*)&flash[i + sizeof(BOOTLOADER_MARKER) - 1];
+            size_t len = 0;
+            while (len < max_len - 1 && ver[len] != '\0' && ver[len] != ' ' && ver[len] != '\n' && ver[len] != '\r') {
+                out[len] = ver[len];
+                len++;
+            }
+            out[len] = '\0';
+            return len > 0; // bootloader string is non-empty
+        }
+    }
+    return false;
+}
+
+bool NRF52Board::startOTAUpdate(const char *id, char reply[]) {
+  // Config the peripheral connection with maximum bandwidth
+  // more SRAM required by SoftDevice
+  // Note: All config***() function must be called before begin()
+  Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
+  Bluefruit.configPrphConn(92, BLE_GAP_EVENT_LENGTH_MIN, 16, 16);
+
+  Bluefruit.begin(1, 0);
+  // Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
+  Bluefruit.setTxPower(4);
+  // Set the BLE device name
+  Bluefruit.setName(ota_name);
+
+  Bluefruit.Periph.setConnectCallback(connect_callback);
+  Bluefruit.Periph.setDisconnectCallback(disconnect_callback);
+
+  // To be consistent OTA DFU should be added first if it exists
+  bledfu.begin();
+
+  // Set up and start advertising
+  // Advertising packet
+  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
+  Bluefruit.Advertising.addTxPower();
+  Bluefruit.Advertising.addName();
+
+  /* Start Advertising
+    - Enable auto advertising if disconnected
+    - Interval:  fast mode = 20 ms, slow mode = 152.5 ms
+    - Timeout for fast mode is 30 seconds
+    - Start(timeout) with timeout = 0 will advertise forever (until connected)
+
+    For recommended advertising interval
+    https://developer.apple.com/library/content/qa/qa1931/_index.html
+  */
+  Bluefruit.Advertising.restartOnDisconnect(true);
+  Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms
+  Bluefruit.Advertising.setFastTimeout(30);   // number of seconds in fast mode
+  Bluefruit.Advertising.start(0);             // 0 = Don't stop advertising after n seconds
+
+  uint8_t mac_addr[6];
+  memset(mac_addr, 0, sizeof(mac_addr));
+  Bluefruit.getAddr(mac_addr);
+  sprintf(reply, "OK - mac: %02X:%02X:%02X:%02X:%02X:%02X", mac_addr[5], mac_addr[4], mac_addr[3],
+          mac_addr[2], mac_addr[1], mac_addr[0]);
+
+  return true;
+}
+#endif

src/helpers/NRF52Board.h

@@ -0,0 +1,79 @@
+#pragma once
+
+#include <Arduino.h>
+#include <MeshCore.h>
+
+#if defined(NRF52_PLATFORM)
+
+#ifdef NRF52_POWER_MANAGEMENT
+// Shutdown Reason Codes (stored in GPREGRET before SYSTEMOFF)
+#define SHUTDOWN_REASON_NONE          0x00
+#define SHUTDOWN_REASON_LOW_VOLTAGE   0x4C  // 'L' - Runtime low voltage threshold
+#define SHUTDOWN_REASON_USER          0x55  // 'U' - User requested powerOff()
+#define SHUTDOWN_REASON_BOOT_PROTECT  0x42  // 'B' - Boot voltage protection
+
+// Boards provide this struct with their hardware-specific settings and callbacks.
+struct PowerMgtConfig {
+  // LPCOMP wake configuration (for voltage recovery from SYSTEMOFF)
+  uint8_t lpcomp_ain_channel;       // AIN0-7 for voltage sensing pin
+  uint8_t lpcomp_refsel;            // REFSEL value: 0-6=1/8..7/8, 7=ARef, 8-15=1/16..15/16
+
+  // Boot protection voltage threshold (millivolts)
+  // Set to 0 to disable boot protection
+  uint16_t voltage_bootlock;
+};
+#endif
+
+class NRF52Board : public mesh::MainBoard {
+#ifdef NRF52_POWER_MANAGEMENT
+  void initPowerMgr();
+#endif
+
+protected:
+  uint8_t startup_reason;
+  char *ota_name;
+
+#ifdef NRF52_POWER_MANAGEMENT
+  uint32_t reset_reason;              // RESETREAS register value
+  uint8_t shutdown_reason;            // GPREGRET value (why we entered last SYSTEMOFF)
+  uint16_t boot_voltage_mv;           // Battery voltage at boot (millivolts)
+
+  bool checkBootVoltage(const PowerMgtConfig* config);
+  void enterSystemOff(uint8_t reason);
+  void configureVoltageWake(uint8_t ain_channel, uint8_t refsel);
+  virtual void initiateShutdown(uint8_t reason);
+#endif
+
+public:
+  NRF52Board(char *otaname) : ota_name(otaname) {}
+  virtual void begin();
+  virtual uint8_t getStartupReason() const override { return startup_reason; }
+  virtual float getMCUTemperature() override;
+  virtual void reboot() override { NVIC_SystemReset(); }
+  virtual bool getBootloaderVersion(char* version, size_t max_len) override;
+  virtual bool startOTAUpdate(const char *id, char reply[]) override;
+  virtual void sleep(uint32_t secs) override;
+
+#ifdef NRF52_POWER_MANAGEMENT
+  bool isExternalPowered() override;
+  uint16_t getBootVoltage() override { return boot_voltage_mv; }
+  virtual uint32_t getResetReason() const override { return reset_reason; }
+  uint8_t getShutdownReason() const override { return shutdown_reason; }
+  const char* getResetReasonString(uint32_t reason) override;
+  const char* getShutdownReasonString(uint8_t reason) override;
+#endif
+};
+
+/*
+ * The NRF52 has an internal DC/DC regulator that allows increased efficiency
+ * compared to the LDO regulator. For being able to use it, the module/board
+ * needs to have the required inductors and and capacitors populated. If the
+ * hardware requirements are met, this subclass can be used to enable the DC/DC
+ * regulator.
+ */
+class NRF52BoardDCDC : virtual public NRF52Board {
+public:
+  NRF52BoardDCDC() {}
+  virtual void begin() override;
+};
+#endif

src/helpers/RegionMap.cpp

@@ -2,6 +2,45 @@
 #include <helpers/TxtDataHelpers.h>
 #include <SHA256.h>
 
+// helper class for region map exporter, we emulate Stream with a safe buffer writer.
+
+class BufStream : public Stream {
+public:
+  BufStream(char *buf, size_t max_len)
+    : _buf(buf), _max_len(max_len), _pos(0) {
+    if (_max_len > 0) _buf[0] = 0;
+  }
+
+  size_t write(uint8_t c) override {
+    if (_pos + 1 >= _max_len) return 0;
+    _buf[_pos++] = c;
+    _buf[_pos] = 0;
+    return 1;
+  }
+
+  size_t write(const uint8_t *buffer, size_t size) override {
+    size_t written = 0;
+    while (written < size) {
+      if (!write(buffer[written])) break;
+      written++;
+    }
+    return written;
+  }
+
+  int available() override { return 0; }
+  int read() override { return -1; }
+  int peek() override { return -1; }
+  void flush() override {}
+
+  size_t length() const { return _pos; }
+
+private:
+  char *_buf;
+  size_t _max_len;
+  size_t _pos;
+};
+
+
 RegionMap::RegionMap(TransportKeyStore& store) : _store(&store) {
   next_id = 1; num_regions = 0; home_id = 0;
   wildcard.id = wildcard.parent = 0;
@@ -9,8 +48,13 @@ RegionMap::RegionMap(TransportKeyStore& store) : _store(&store) {
   strcpy(wildcard.name, "*");
 }
 
-bool RegionMap::is_name_char(char c) {
-  return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '-' || c == '.' || c == '_' || c == '#';
+bool RegionMap::is_name_char(uint8_t c) {
+  // accept all alpha-num or accented characters, but exclude most punctuation chars
+  return c == '-' || c == '$' || c == '#' || (c >= '0' && c <= '9') || c >= 'A';
+}
+
+static const char* skip_hash(const char* name) {
+  return *name == '#' ? name + 1 : name;
 }
 
 static File openWrite(FILESYSTEM* _fs, const char* filename) {
@@ -24,12 +68,12 @@ static File openWrite(FILESYSTEM* _fs, const char* filename) {
   #endif
 }
 
-bool RegionMap::load(FILESYSTEM* _fs) {
-  if (_fs->exists("/regions2")) {
+bool RegionMap::load(FILESYSTEM* _fs, const char* path) {
+  if (_fs->exists(path ? path : "/regions2")) {
   #if defined(RP2040_PLATFORM)
-    File file = _fs->open("/regions2", "r");
+    File file = _fs->open(path ? path : "/regions2", "r");
   #else
-    File file = _fs->open("/regions2");
+    File file = _fs->open(path ? path : "/regions2");
   #endif
 
     if (file) {
@@ -67,8 +111,8 @@ bool RegionMap::load(FILESYSTEM* _fs) {
   return false;  // failed
 }
 
-bool RegionMap::save(FILESYSTEM* _fs) {
-  File file = openWrite(_fs, "/regions2");
+bool RegionMap::save(FILESYSTEM* _fs, const char* path) {
+  File file = openWrite(_fs, path ? path : "/regions2");
   if (file) {
     uint8_t pad[128];
     memset(pad, 0, sizeof(pad));
@@ -126,11 +170,17 @@ RegionEntry* RegionMap::findMatch(mesh::Packet* packet, uint8_t mask) {
     if ((region->flags & mask) == 0) {   // does region allow this? (per 'mask' param)
       TransportKey keys[4];
       int num;
-      if (region->name[0] == '#') {   // auto hashtag region
+      if (region->name[0] == '$') {   // private region
+        num = _store->loadKeysFor(region->id, keys, 4);
+      } else if (region->name[0] == '#') {   // auto hashtag region
         _store->getAutoKeyFor(region->id, region->name, keys[0]);
         num = 1;
-      } else {
-        num = _store->loadKeysFor(region->id, keys, 4);
+      } else {   // new: implicit auto hashtag region
+        char tmp[sizeof(region->name)];
+        tmp[0] = '#';
+        strcpy(&tmp[1], region->name);
+        _store->getAutoKeyFor(region->id, tmp, keys[0]);
+        num = 1;
       }
       for (int j = 0; j < num; j++) {
         uint16_t code = keys[j].calcTransportCode(packet);
@@ -146,9 +196,10 @@ RegionEntry* RegionMap::findMatch(mesh::Packet* packet, uint8_t mask) {
 RegionEntry* RegionMap::findByName(const char* name) {
   if (strcmp(name, "*") == 0) return &wildcard;
 
+  if (*name == '#') { name++; }  // ignore the '#' when matching by name
   for (int i = 0; i < num_regions; i++) {
     auto region = &regions[i];
-    if (strcmp(name, region->name) == 0) return region;
+    if (strcmp(name, skip_hash(region->name)) == 0) return region;
   }
   return NULL;  // not found
 }
@@ -156,11 +207,12 @@ RegionEntry* RegionMap::findByName(const char* name) {
 RegionEntry* RegionMap::findByNamePrefix(const char* prefix) {
   if (strcmp(prefix, "*") == 0) return &wildcard;
 
+  if (*prefix == '#') { prefix++; }  // ignore the '#' when matching by name
   RegionEntry* partial = NULL;
   for (int i = 0; i < num_regions; i++) {
     auto region = &regions[i];
-    if (strcmp(prefix, region->name) == 0) return region;  // is a complete match, preference this one
-    if (memcmp(prefix, region->name, strlen(prefix)) == 0) {
+    if (strcmp(prefix, skip_hash(region->name)) == 0) return region;  // is a complete match, preference this one
+    if (memcmp(prefix, skip_hash(region->name), strlen(prefix)) == 0) {
       partial = region;
     }
   }
@@ -219,9 +271,9 @@ void RegionMap::printChildRegions(int indent, const RegionEntry* parent, Stream&
   }
 
   if (parent->flags & REGION_DENY_FLOOD) {
-    out.printf("%s%s\n", parent->name, parent->id == home_id ? "^" : "");
+    out.printf("%s%s\n", skip_hash(parent->name), parent->id == home_id ? "^" : "");
   } else {
-    out.printf("%s%s F\n", parent->name, parent->id == home_id ? "^" : "");
+    out.printf("%s%s F\n", skip_hash(parent->name), parent->id == home_id ? "^" : "");
   }
 
   for (int i = 0; i < num_regions; i++) {
@@ -235,3 +287,43 @@ void RegionMap::printChildRegions(int indent, const RegionEntry* parent, Stream&
 void RegionMap::exportTo(Stream& out) const {
   printChildRegions(0, &wildcard, out);   // recursive
 }
+
+size_t RegionMap::exportTo(char *dest, size_t max_len) const {
+  if (!dest || max_len == 0) return 0;
+
+  BufStream bs(dest, max_len);
+  exportTo(bs);              // ← reuse existing logic
+  return bs.length();
+}
+
+int RegionMap::exportNamesTo(char *dest, int max_len, uint8_t mask, bool invert) {
+  char *dp = dest;
+  
+  // Check wildcard region
+  bool wildcard_matches = invert ? (wildcard.flags & mask) : !(wildcard.flags & mask);
+  if (wildcard_matches) {
+    *dp++ = '*';
+    *dp++ = ',';
+  }
+
+    for (int i = 0; i < num_regions; i++) {
+    auto region = &regions[i];
+    
+    // Check if region matches the filter criteria
+    bool region_matches = invert ? (region->flags & mask) : !(region->flags & mask);
+    
+    if (region_matches) {
+      int len = strlen(skip_hash(region->name));
+      if ((dp - dest) + len + 2 < max_len) {   // only append if name will fit
+        memcpy(dp, skip_hash(region->name), len);
+        dp += len;
+        *dp++ = ',';
+      }
+    }
+  }
+
+  if (dp > dest) { dp--; }   // don't include trailing comma
+
+  *dp = 0;  // set null terminator
+  return dp - dest;   // return length
+}

src/helpers/RegionMap.h

@@ -30,10 +30,10 @@ class RegionMap {
 public:
   RegionMap(TransportKeyStore& store);
 
-  static bool is_name_char(char c);
+  static bool is_name_char(uint8_t c);
 
-  bool load(FILESYSTEM* _fs);
-  bool save(FILESYSTEM* _fs);
+  bool load(FILESYSTEM* _fs, const char* path=NULL);
+  bool save(FILESYSTEM* _fs, const char* path=NULL);
 
   RegionEntry* putRegion(const char* name, uint16_t parent_id, uint16_t id = 0);
   RegionEntry* findMatch(mesh::Packet* packet, uint8_t mask);
@@ -47,6 +47,11 @@ public:
   bool clear();
   void resetFrom(const RegionMap& src) { num_regions = 0; next_id = src.next_id; }
   int getCount() const { return num_regions; }
+  const RegionEntry* getByIdx(int i) const { return &regions[i]; }
+  const RegionEntry* getRoot() const { return &wildcard; }
+  int exportNamesTo(char *dest, int max_len, uint8_t mask, bool invert = false);
 
-  void exportTo(Stream& out) const;
+  void    exportTo(Stream& out) const;
+  size_t  exportTo(char *dest, size_t max_len) const;
+ 
 };

src/helpers/StaticPoolPacketManager.cpp

@@ -11,7 +11,7 @@ PacketQueue::PacketQueue(int max_entries) {
 int PacketQueue::countBefore(uint32_t now) const {
   int n = 0;
   for (int j = 0; j < _num; j++) {
-    if (_schedule_table[j] > now) continue;   // scheduled for future... ignore for now
+    if ((int32_t)(_schedule_table[j] - now) > 0) continue;   // scheduled for future... ignore for now
     n++;
   }
   return n;
@@ -21,7 +21,7 @@ mesh::Packet* PacketQueue::get(uint32_t now) {
   uint8_t min_pri = 0xFF;
   int best_idx = -1;
   for (int j = 0; j < _num; j++) {
-    if (_schedule_table[j] > now) continue;   // scheduled for future... ignore for now
+    if ((int32_t)(_schedule_table[j] - now) > 0) continue;   // scheduled for future... ignore for now
     if (_pri_table[j] < min_pri) {  // select most important priority amongst non-future entries
       min_pri = _pri_table[j];
       best_idx = j;
@@ -55,15 +55,15 @@ mesh::Packet* PacketQueue::removeByIdx(int i) {
   return item;
 }
 
-void PacketQueue::add(mesh::Packet* packet, uint8_t priority, uint32_t scheduled_for) {
+bool PacketQueue::add(mesh::Packet* packet, uint8_t priority, uint32_t scheduled_for) {
   if (_num == _size) {
-    // TODO: log "FATAL: queue is full!"
-    return;
+    return false;
   }
   _table[_num] = packet;
   _pri_table[_num] = priority;
   _schedule_table[_num] = scheduled_for;
   _num++;
+  return true;
 }
 
 StaticPoolPacketManager::StaticPoolPacketManager(int pool_size): unused(pool_size), send_queue(pool_size), rx_queue(pool_size) {
@@ -82,7 +82,10 @@ void StaticPoolPacketManager::free(mesh::Packet* packet) {
 }
 
 void StaticPoolPacketManager::queueOutbound(mesh::Packet* packet, uint8_t priority, uint32_t scheduled_for) {
-  send_queue.add(packet, priority, scheduled_for);
+  if (!send_queue.add(packet, priority, scheduled_for)) {
+    MESH_DEBUG_PRINTLN("queueOutbound: send queue full, dropping packet");
+    free(packet);
+  }
 }
 
 mesh::Packet* StaticPoolPacketManager::getNextOutbound(uint32_t now) {
@@ -106,7 +109,10 @@ mesh::Packet* StaticPoolPacketManager::removeOutboundByIdx(int i) {
 }
 
 void StaticPoolPacketManager::queueInbound(mesh::Packet* packet, uint32_t scheduled_for) {
-  rx_queue.add(packet, 0, scheduled_for);
+  if (!rx_queue.add(packet, 0, scheduled_for)) {
+    MESH_DEBUG_PRINTLN("queueInbound: rx queue full, dropping packet");
+    free(packet);
+  }
 }
 mesh::Packet* StaticPoolPacketManager::getNextInbound(uint32_t now) {
   return rx_queue.get(now);

src/helpers/StaticPoolPacketManager.h

@@ -11,7 +11,7 @@ class PacketQueue {
 public:
   PacketQueue(int max_entries);
   mesh::Packet* get(uint32_t now);
-  void add(mesh::Packet* packet, uint8_t priority, uint32_t scheduled_for);
+  bool add(mesh::Packet* packet, uint8_t priority, uint32_t scheduled_for);
   int count() const { return _num; }
   int countBefore(uint32_t now) const;
   mesh::Packet* itemAt(int i) const { return _table[i]; }

src/helpers/StatsFormatHelper.h

@@ -42,13 +42,14 @@ public:
                                uint32_t n_recv_flood,
                                uint32_t n_recv_direct) {
     sprintf(reply, 
-      "{\"recv\":%u,\"sent\":%u,\"flood_tx\":%u,\"direct_tx\":%u,\"flood_rx\":%u,\"direct_rx\":%u}",
+      "{\"recv\":%u,\"sent\":%u,\"flood_tx\":%u,\"direct_tx\":%u,\"flood_rx\":%u,\"direct_rx\":%u,\"recv_errors\":%u}",
       driver.getPacketsRecv(),
       driver.getPacketsSent(),
       n_sent_flood,
       n_sent_direct,
       n_recv_flood,
-      n_recv_direct
+      n_recv_direct,
+      driver.getPacketsRecvErrors()
     );
   }
 };

src/helpers/TxtDataHelpers.cpp

@@ -140,6 +140,19 @@ const char* StrHelper::ftoa(float f) {
   return tmp;
 }
 
+const char* StrHelper::ftoa3(float f) {
+  static char s[16];
+  int v = (int)(f * 1000.0f + (f >= 0 ? 0.5f : -0.5f)); // rounded ×1000
+  int w = v / 1000;                                     // whole
+  int d = abs(v % 1000);                                // decimals
+  snprintf(s, sizeof(s), "%d.%03d", w, d);
+  for (int i = strlen(s) - 1; i > 0 && s[i] == '0'; i--)
+      s[i] = 0;
+  int L = strlen(s);
+  if (s[L - 1] == '.') s[L - 1] = 0;
+  return s;
+}
+
 uint32_t StrHelper::fromHex(const char* src) {
   uint32_t n = 0;
   while (*src) {

src/helpers/TxtDataHelpers.h

@@ -12,6 +12,7 @@ public:
   static void strncpy(char* dest, const char* src, size_t buf_sz);
   static void strzcpy(char* dest, const char* src, size_t buf_sz);   // pads with trailing nulls
   static const char* ftoa(float f);
+  static const char* ftoa3(float f); //Converts float to string with 3 decimal places
   static bool isBlank(const char* str);
   static uint32_t fromHex(const char* src);
 };

src/helpers/bridges/RS232Bridge.cpp

@@ -16,7 +16,8 @@ void RS232Bridge::begin() {
 #if defined(ESP32)
   ((HardwareSerial *)_serial)->setPins(WITH_RS232_BRIDGE_RX, WITH_RS232_BRIDGE_TX);
 #elif defined(NRF52_PLATFORM)
-  ((HardwareSerial *)_serial)->setPins(WITH_RS232_BRIDGE_RX, WITH_RS232_BRIDGE_TX);
+  // Tested with RAK_4631 and T114
+  ((Uart *)_serial)->setPins(WITH_RS232_BRIDGE_RX, WITH_RS232_BRIDGE_TX);
 #elif defined(RP2040_PLATFORM)
   ((SerialUART *)_serial)->setRX(WITH_RS232_BRIDGE_RX);
   ((SerialUART *)_serial)->setTX(WITH_RS232_BRIDGE_TX);
@@ -121,8 +122,7 @@ void RS232Bridge::sendPacket(mesh::Packet *packet) {
 
     // Check if packet fits within our maximum payload size
     if (len > (MAX_TRANS_UNIT + 1)) {
-      BRIDGE_DEBUG_PRINTLN("TX packet too large (payload=%d, max=%d)\n", len,
-                           MAX_TRANS_UNIT + 1);
+      BRIDGE_DEBUG_PRINTLN("TX packet too large (payload=%d, max=%d)\n", len, MAX_TRANS_UNIT + 1);
       return;
     }
 

src/helpers/bridges/RS232Bridge.h

@@ -40,7 +40,7 @@
  * Platform Support:
  * Different platforms require different pin configuration methods:
  * - ESP32: Uses HardwareSerial::setPins(rx, tx)
- * - NRF52: Uses HardwareSerial::setPins(rx, tx)
+ * - NRF52: Uses Uart::setPins(rx, tx)
  * - RP2040: Uses SerialUART::setRX(rx) and SerialUART::setTX(tx)
  * - STM32: Uses HardwareSerial::setRx(rx) and HardwareSerial::setTx(tx)
  */

src/helpers/esp32/SerialBLEInterface.cpp

@@ -1,4 +1,5 @@
 #include "SerialBLEInterface.h"
+#include "esp_mac.h"
 
 // See the following for generating UUIDs:
 // https://www.uuidgenerator.net/
@@ -9,11 +10,21 @@
 
 #define ADVERT_RESTART_DELAY  1000   // millis
 
-void SerialBLEInterface::begin(const char* device_name, uint32_t pin_code) {
+void SerialBLEInterface::begin(const char* prefix, char* name, uint32_t pin_code) {
   _pin_code = pin_code;
 
+  if (strcmp(name, "@@MAC") == 0) {
+    uint8_t addr[8];
+    memset(addr, 0, sizeof(addr));
+    esp_efuse_mac_get_default(addr);
+    sprintf(name, "%02X%02X%02X%02X%02X%02X",    // modify (IN-OUT param)
+          addr[5], addr[4], addr[3], addr[2], addr[1], addr[0]);
+  }
+  char dev_name[32+16];
+  sprintf(dev_name, "%s%s", prefix, name);
+
   // Create the BLE Device
-  BLEDevice::init(device_name);
+  BLEDevice::init(dev_name);
   BLEDevice::setSecurityCallbacks(this);
   BLEDevice::setMTU(MAX_FRAME_SIZE);
 

src/helpers/esp32/SerialBLEInterface.h

@@ -61,7 +61,13 @@ public:
     send_queue_len = recv_queue_len = 0;
   }
 
-  void begin(const char* device_name, uint32_t pin_code);
+  /**
+   * init the BLE interface.
+   * @param prefix   a prefix for the device name
+   * @param name  IN/OUT - a name for the device (combined with prefix). If "@@MAC", is modified and returned
+   * @param pin_code   the BLE security pin
+   */
+  void begin(const char* prefix, char* name, uint32_t pin_code);
 
   // BaseSerialInterface methods
   void enable() override;

src/helpers/esp32/SerialWifiInterface.cpp

@@ -43,6 +43,15 @@ bool SerialWifiInterface::isWriteBusy() const {
   return false;
 }
 
+bool SerialWifiInterface::hasReceivedFrameHeader() {
+  return received_frame_header.type != 0 && received_frame_header.length != 0;
+}
+
+void SerialWifiInterface::resetReceivedFrameHeader() {
+  received_frame_header.type = 0;
+  received_frame_header.length = 0;
+}
+
 size_t SerialWifiInterface::checkRecvFrame(uint8_t dest[]) {
   // check if new client connected
   auto newClient = server.available();
@@ -54,6 +63,9 @@ size_t SerialWifiInterface::checkRecvFrame(uint8_t dest[]) {
 
     // switch active connection to new client
     client = newClient;
+
+    // forget received frame header
+    resetReceivedFrameHeader();
     
   }
 
@@ -86,13 +98,69 @@ size_t SerialWifiInterface::checkRecvFrame(uint8_t dest[]) {
         send_queue[i] = send_queue[i + 1];
       }
     } else {
-      int len = client.available();
-      if (len > 0) {
-        uint8_t buf[MAX_FRAME_SIZE + 4];
-        client.readBytes(buf, len);
-        memcpy(dest, buf+3, len-3); // remove header (don't even check ... problems are on the other dir)
-        return len-3;
+
+      // check if we are waiting for a frame header
+      if(!hasReceivedFrameHeader()){
+
+        // make sure we have received enough bytes for a frame header
+        // 3 bytes frame header = (1 byte frame type) + (2 bytes frame length as unsigned 16-bit little endian)
+        int frame_header_length = 3;
+        if(client.available() >= frame_header_length){
+
+          // read frame header
+          client.readBytes(&received_frame_header.type, 1);
+          client.readBytes((uint8_t*)&received_frame_header.length, 2);
+
+        }
+
       }
+
+      // check if we have received a frame header
+      if(hasReceivedFrameHeader()){
+
+        // make sure we have received enough bytes for the required frame length
+        int available = client.available();
+        int frame_type = received_frame_header.type;
+        int frame_length = received_frame_header.length;
+        if(frame_length > available){
+          WIFI_DEBUG_PRINTLN("Waiting for %d more bytes", frame_length - available);
+          return 0;
+        }
+
+        // skip frames that are larger than MAX_FRAME_SIZE
+        if(frame_length > MAX_FRAME_SIZE){
+          WIFI_DEBUG_PRINTLN("Skipping frame: length=%d is larger than MAX_FRAME_SIZE=%d", frame_length, MAX_FRAME_SIZE);
+          while(frame_length > 0){
+            uint8_t skip[1];
+            int skipped = client.read(skip, 1);
+            frame_length -= skipped;
+          }
+          resetReceivedFrameHeader();
+          return 0;
+        }
+
+        // skip frames that are not expected type
+        // '<' is 0x3c which indicates a frame sent from app to radio
+        if(frame_type != '<'){
+          WIFI_DEBUG_PRINTLN("Skipping frame: type=0x%x is unexpected", frame_type);
+          while(frame_length > 0){
+            uint8_t skip[1];
+            int skipped = client.read(skip, 1);
+            frame_length -= skipped;
+          }
+          resetReceivedFrameHeader();
+          return 0;
+        }
+
+        // read frame data to provided buffer
+        client.readBytes(dest, frame_length);
+
+        // ready for next frame
+        resetReceivedFrameHeader();
+        return frame_length;
+
+      }
+      
     }
   }
 

src/helpers/esp32/SerialWifiInterface.h

@@ -12,11 +12,18 @@ class SerialWifiInterface : public BaseSerialInterface {
   WiFiServer server;
   WiFiClient client;
 
+  struct FrameHeader {
+    uint8_t type;
+    uint16_t length;
+  };
+
   struct Frame {
     uint8_t len;
     uint8_t buf[MAX_FRAME_SIZE];
   };
 
+  FrameHeader received_frame_header;
+
   #define FRAME_QUEUE_SIZE  4
   int recv_queue_len;
   Frame recv_queue[FRAME_QUEUE_SIZE];
@@ -33,6 +40,8 @@ public:
     _isEnabled = false;
     _last_write = 0;
     send_queue_len = recv_queue_len = 0;
+    received_frame_header.type = 0;
+    received_frame_header.length = 0;
   }
 
   void begin(int port);
@@ -47,6 +56,9 @@ public:
 
   size_t writeFrame(const uint8_t src[], size_t len) override;
   size_t checkRecvFrame(uint8_t dest[]) override;
+
+  bool hasReceivedFrameHeader();
+  void resetReceivedFrameHeader();
 };
 
 #if WIFI_DEBUG_LOGGING && ARDUINO

src/helpers/esp32/TBeamBoard.h

@@ -2,16 +2,7 @@
 
 #if defined(TBEAM_SUPREME_SX1262) || defined(TBEAM_SX1262) || defined(TBEAM_SX1276)
 
-#include <Wire.h>
-#include <Arduino.h>
-#include "XPowersLib.h"
-#include "helpers/ESP32Board.h"
-#include <driver/rtc_io.h>
-//#include <RadioLib.h>
-//#include <helpers/RadioLibWrappers.h>
-//#include <helpers/CustomSX1262Wrapper.h>
-//#include <helpers/CustomSX1276Wrapper.h>
-
+// Define pin mappings BEFORE including ESP32Board.h so sleep() can use P_LORA_DIO_1
 #ifdef TBEAM_SUPREME_SX1262
   // LoRa radio module pins for TBeam S3 Supreme SX1262
   #define  P_LORA_DIO_0   -1   //NC
@@ -90,6 +81,13 @@
 //   SX1276
 // };
 
+// Include headers AFTER pin definitions so ESP32Board::sleep() can use P_LORA_DIO_1
+#include <Wire.h>
+#include <Arduino.h>
+#include "XPowersLib.h"
+#include "helpers/ESP32Board.h"
+#include <driver/rtc_io.h>
+
 class TBeamBoard : public ESP32Board {
 XPowersLibInterface *PMU = NULL;
 //PhysicalLayer * pl;

src/helpers/nrf52/SerialBLEInterface.cpp

@@ -1,193 +1,397 @@
 #include "SerialBLEInterface.h"
+#include <stdio.h>
+#include <string.h>
+#include "ble_gap.h"
+#include "ble_hci.h"
 
-static SerialBLEInterface* instance;
+// Magic numbers came from actual testing
+#define BLE_HEALTH_CHECK_INTERVAL  10000  // Advertising watchdog check every 10 seconds
+#define BLE_RETRY_THROTTLE_MS      250    // Throttle retries to 250ms when queue buildup detected
+
+// Connection parameters (units: interval=1.25ms, timeout=10ms)
+#define BLE_MIN_CONN_INTERVAL      12     // 15ms
+#define BLE_MAX_CONN_INTERVAL      24     // 30ms
+#define BLE_SLAVE_LATENCY          4
+#define BLE_CONN_SUP_TIMEOUT       200    // 2000ms
+
+// Advertising parameters
+#define BLE_ADV_INTERVAL_MIN       32     // 20ms (units: 0.625ms)
+#define BLE_ADV_INTERVAL_MAX       244    // 152.5ms (units: 0.625ms)
+#define BLE_ADV_FAST_TIMEOUT       30     // seconds
+
+// RX drain buffer size for overflow protection
+#define BLE_RX_DRAIN_BUF_SIZE      32
+
+static SerialBLEInterface* instance = nullptr;
 
 void SerialBLEInterface::onConnect(uint16_t connection_handle) {
-  BLE_DEBUG_PRINTLN("SerialBLEInterface: connected");
-  // we now set _isDeviceConnected=true in onSecured callback instead
+  BLE_DEBUG_PRINTLN("SerialBLEInterface: connected handle=0x%04X", connection_handle);
+  if (instance) {
+    instance->_conn_handle = connection_handle;
+    instance->_isDeviceConnected = false;
+    instance->clearBuffers();
+  }
 }
 
 void SerialBLEInterface::onDisconnect(uint16_t connection_handle, uint8_t reason) {
-  BLE_DEBUG_PRINTLN("SerialBLEInterface: disconnected reason=%d", reason);
-  if(instance){
-    instance->_isDeviceConnected = false;
-    instance->startAdv();
+  BLE_DEBUG_PRINTLN("SerialBLEInterface: disconnected handle=0x%04X reason=%u", connection_handle, reason);
+  if (instance) {
+    if (instance->_conn_handle == connection_handle) {
+      instance->_conn_handle = BLE_CONN_HANDLE_INVALID;
+      instance->_isDeviceConnected = false;
+      instance->clearBuffers();
+    }
   }
 }
 
 void SerialBLEInterface::onSecured(uint16_t connection_handle) {
-  BLE_DEBUG_PRINTLN("SerialBLEInterface: onSecured");
-  if(instance){
-    instance->_isDeviceConnected = true;
-    // no need to stop advertising on connect, as the ble stack does this automatically
+  BLE_DEBUG_PRINTLN("SerialBLEInterface: onSecured handle=0x%04X", connection_handle);
+  if (instance) {
+    if (instance->isValidConnection(connection_handle, true)) {
+      instance->_isDeviceConnected = true;
+      
+      // Connection interval units: 1.25ms, supervision timeout units: 10ms
+      // Apple: "The product will not read or use the parameters in the Peripheral Preferred Connection Parameters characteristic."
+      // So we explicitly set it here to make Android & Apple match
+      ble_gap_conn_params_t conn_params;
+      conn_params.min_conn_interval = BLE_MIN_CONN_INTERVAL;
+      conn_params.max_conn_interval = BLE_MAX_CONN_INTERVAL;
+      conn_params.slave_latency = BLE_SLAVE_LATENCY;
+      conn_params.conn_sup_timeout = BLE_CONN_SUP_TIMEOUT;
+      
+      uint32_t err_code = sd_ble_gap_conn_param_update(connection_handle, &conn_params);
+      if (err_code == NRF_SUCCESS) {
+        BLE_DEBUG_PRINTLN("Connection parameter update requested: %u-%ums interval, latency=%u, %ums timeout",
+                         conn_params.min_conn_interval * 5 / 4,  // convert to ms (1.25ms units)
+                         conn_params.max_conn_interval * 5 / 4,
+                         conn_params.slave_latency,
+                         conn_params.conn_sup_timeout * 10);  // convert to ms (10ms units)
+      } else {
+        BLE_DEBUG_PRINTLN("Failed to request connection parameter update: %lu", err_code);
+      }
+    } else {
+      BLE_DEBUG_PRINTLN("onSecured: ignoring stale/duplicate callback");
+    }
   }
 }
 
-void SerialBLEInterface::begin(const char* device_name, uint32_t pin_code) {
+bool SerialBLEInterface::onPairingPasskey(uint16_t connection_handle, uint8_t const passkey[6], bool match_request) {
+  (void)connection_handle;
+  (void)passkey;
+  BLE_DEBUG_PRINTLN("SerialBLEInterface: pairing passkey request match=%d", match_request);
+  return true;
+}
 
+void SerialBLEInterface::onPairingComplete(uint16_t connection_handle, uint8_t auth_status) {
+  BLE_DEBUG_PRINTLN("SerialBLEInterface: pairing complete handle=0x%04X status=%u", connection_handle, auth_status);
+  if (instance) {
+    if (instance->isValidConnection(connection_handle)) {
+      if (auth_status == BLE_GAP_SEC_STATUS_SUCCESS) {
+        BLE_DEBUG_PRINTLN("SerialBLEInterface: pairing successful");
+      } else {
+        BLE_DEBUG_PRINTLN("SerialBLEInterface: pairing failed, disconnecting");
+        instance->disconnect();
+      }
+    } else {
+      BLE_DEBUG_PRINTLN("onPairingComplete: ignoring stale callback");
+    }
+  }
+}
+
+void SerialBLEInterface::onBLEEvent(ble_evt_t* evt) {
+  if (!instance) return;
+  
+  if (evt->header.evt_id == BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST) {
+    uint16_t conn_handle = evt->evt.gap_evt.conn_handle;
+    if (instance->isValidConnection(conn_handle)) {
+      BLE_DEBUG_PRINTLN("CONN_PARAM_UPDATE_REQUEST: handle=0x%04X, min_interval=%u, max_interval=%u, latency=%u, timeout=%u",
+                       conn_handle,
+                       evt->evt.gap_evt.params.conn_param_update_request.conn_params.min_conn_interval,
+                       evt->evt.gap_evt.params.conn_param_update_request.conn_params.max_conn_interval,
+                       evt->evt.gap_evt.params.conn_param_update_request.conn_params.slave_latency,
+                       evt->evt.gap_evt.params.conn_param_update_request.conn_params.conn_sup_timeout);
+      
+      uint32_t err_code = sd_ble_gap_conn_param_update(conn_handle, NULL);
+      if (err_code == NRF_SUCCESS) {
+        BLE_DEBUG_PRINTLN("Accepted CONN_PARAM_UPDATE_REQUEST (using PPCP)");
+      } else {
+        BLE_DEBUG_PRINTLN("ERROR: Failed to accept CONN_PARAM_UPDATE_REQUEST: 0x%08X", err_code);
+      }
+    } else {
+      BLE_DEBUG_PRINTLN("CONN_PARAM_UPDATE_REQUEST: ignoring stale callback for handle=0x%04X", conn_handle);
+    }
+  }
+}
+
+void SerialBLEInterface::begin(const char* prefix, char* name, uint32_t pin_code) {
   instance = this;
 
   char charpin[20];
-  sprintf(charpin, "%d", pin_code);
-
+  snprintf(charpin, sizeof(charpin), "%lu", (unsigned long)pin_code);
+  
+  // If we want to control BLE LED ourselves, uncomment this:
+  // Bluefruit.autoConnLed(false);
   Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);
-  Bluefruit.configPrphConn(250, BLE_GAP_EVENT_LENGTH_MIN, 16, 16);  // increase MTU
-  Bluefruit.setTxPower(BLE_TX_POWER);
   Bluefruit.begin();
-  Bluefruit.setName(device_name);
+ 
+  char dev_name[32+16];
+  if (strcmp(name, "@@MAC") == 0) {
+    ble_gap_addr_t addr;
+    if (sd_ble_gap_addr_get(&addr) == NRF_SUCCESS) {
+      sprintf(name, "%02X%02X%02X%02X%02X%02X",    // modify (IN-OUT param)
+          addr.addr[5], addr.addr[4], addr.addr[3], addr.addr[2], addr.addr[1], addr.addr[0]);
+    }
+  }
+  sprintf(dev_name, "%s%s", prefix, name);
+
+  // Connection interval units: 1.25ms, supervision timeout units: 10ms
+  ble_gap_conn_params_t ppcp_params;
+  ppcp_params.min_conn_interval = BLE_MIN_CONN_INTERVAL;
+  ppcp_params.max_conn_interval = BLE_MAX_CONN_INTERVAL;
+  ppcp_params.slave_latency = BLE_SLAVE_LATENCY;
+  ppcp_params.conn_sup_timeout = BLE_CONN_SUP_TIMEOUT;
+  
+  uint32_t err_code = sd_ble_gap_ppcp_set(&ppcp_params);
+  if (err_code == NRF_SUCCESS) {
+    BLE_DEBUG_PRINTLN("PPCP set: %u-%ums interval, latency=%u, %ums timeout",
+                     ppcp_params.min_conn_interval * 5 / 4,  // convert to ms (1.25ms units)
+                     ppcp_params.max_conn_interval * 5 / 4,
+                     ppcp_params.slave_latency,
+                     ppcp_params.conn_sup_timeout * 10);  // convert to ms (10ms units)
+  } else {
+    BLE_DEBUG_PRINTLN("Failed to set PPCP: %lu", err_code);
+  }
+  
+  Bluefruit.setTxPower(BLE_TX_POWER);
+  Bluefruit.setName(dev_name);
 
   Bluefruit.Security.setMITM(true);
   Bluefruit.Security.setPIN(charpin);
+  Bluefruit.Security.setIOCaps(true, false, false);
+  Bluefruit.Security.setPairPasskeyCallback(onPairingPasskey);
+  Bluefruit.Security.setPairCompleteCallback(onPairingComplete);
 
   Bluefruit.Periph.setConnectCallback(onConnect);
   Bluefruit.Periph.setDisconnectCallback(onDisconnect);
   Bluefruit.Security.setSecuredCallback(onSecured);
 
-  // To be consistent OTA DFU should be added first if it exists
-  //bledfu.begin();
+  Bluefruit.setEventCallback(onBLEEvent);
 
-  // Configure and start the BLE Uart service
   bleuart.setPermission(SECMODE_ENC_WITH_MITM, SECMODE_ENC_WITH_MITM);
   bleuart.begin();
-  
-}
+  bleuart.setRxCallback(onBleUartRX);
 
-void SerialBLEInterface::startAdv() {
-
-  BLE_DEBUG_PRINTLN("SerialBLEInterface: starting advertising");
-  
-  // clean restart if already advertising
-  if(Bluefruit.Advertising.isRunning()){
-    BLE_DEBUG_PRINTLN("SerialBLEInterface: already advertising, stopping to allow clean restart");
-    Bluefruit.Advertising.stop();
-  }
-
-  Bluefruit.Advertising.clearData(); // clear advertising data
-  Bluefruit.ScanResponse.clearData(); // clear scan response data
-  
-  // Advertising packet
   Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
   Bluefruit.Advertising.addTxPower();
-  
-  // Include the BLE UART (AKA 'NUS') 128-bit UUID
   Bluefruit.Advertising.addService(bleuart);
 
-  // Secondary Scan Response packet (optional)
-  // Since there is no room for 'Name' in Advertising packet
   Bluefruit.ScanResponse.addName();
 
-  /* Start Advertising
-   * - Enable auto advertising if disconnected
-   * - Interval:  fast mode = 20 ms, slow mode = 152.5 ms
-   * - Timeout for fast mode is 30 seconds
-   * - Start(timeout) with timeout = 0 will advertise forever (until connected)
-   * 
-   * For recommended advertising interval
-   * https://developer.apple.com/library/content/qa/qa1931/_index.html   
-   */
-  Bluefruit.Advertising.restartOnDisconnect(false); // don't restart automatically as we handle it in onDisconnect
-  Bluefruit.Advertising.setInterval(32, 244);
-  Bluefruit.Advertising.setFastTimeout(30);      // number of seconds in fast mode
-  Bluefruit.Advertising.start(0);                // 0 = Don't stop advertising after n seconds
+  Bluefruit.Advertising.setInterval(BLE_ADV_INTERVAL_MIN, BLE_ADV_INTERVAL_MAX);
+  Bluefruit.Advertising.setFastTimeout(BLE_ADV_FAST_TIMEOUT);
+
+  Bluefruit.Advertising.restartOnDisconnect(true);
 
 }
 
-void SerialBLEInterface::stopAdv() {
+void SerialBLEInterface::clearBuffers() {
+  send_queue_len = 0;
+  recv_queue_len = 0;
+  _last_retry_attempt = 0;
+  bleuart.flush();
+}
 
-  BLE_DEBUG_PRINTLN("SerialBLEInterface: stopping advertising");
-  
-  // we only want to stop advertising if it's running, otherwise an invalid state error is logged by ble stack
-  if(!Bluefruit.Advertising.isRunning()){
-    return;
+void SerialBLEInterface::shiftSendQueueLeft() {
+  if (send_queue_len > 0) {
+    send_queue_len--;
+    for (uint8_t i = 0; i < send_queue_len; i++) {
+      send_queue[i] = send_queue[i + 1];
+    }
   }
-
-  // stop advertising
-  Bluefruit.Advertising.stop();
-
 }
 
-// ---------- public methods
+void SerialBLEInterface::shiftRecvQueueLeft() {
+  if (recv_queue_len > 0) {
+    recv_queue_len--;
+    for (uint8_t i = 0; i < recv_queue_len; i++) {
+      recv_queue[i] = recv_queue[i + 1];
+    }
+  }
+}
 
-void SerialBLEInterface::enable() { 
+bool SerialBLEInterface::isValidConnection(uint16_t handle, bool requireWaitingForSecurity) const {
+  if (_conn_handle != handle) {
+    return false;
+  }
+  BLEConnection* conn = Bluefruit.Connection(handle);
+  if (conn == nullptr || !conn->connected()) {
+    return false;
+  }
+  if (requireWaitingForSecurity && _isDeviceConnected) {
+    return false;
+  }
+  return true;
+}
+
+bool SerialBLEInterface::isAdvertising() const {
+  ble_gap_addr_t adv_addr;
+  uint32_t err_code = sd_ble_gap_adv_addr_get(0, &adv_addr);
+  return (err_code == NRF_SUCCESS);
+}
+
+void SerialBLEInterface::enable() {
   if (_isEnabled) return;
 
   _isEnabled = true;
   clearBuffers();
+  _last_health_check = millis();
 
-  // Start advertising
-  startAdv();
+  Bluefruit.Advertising.start(0);
+}
+
+void SerialBLEInterface::disconnect() {
+  if (_conn_handle != BLE_CONN_HANDLE_INVALID) {
+    sd_ble_gap_disconnect(_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
+  }
 }
 
 void SerialBLEInterface::disable() {
   _isEnabled = false;
-  BLE_DEBUG_PRINTLN("SerialBLEInterface::disable");
+  BLE_DEBUG_PRINTLN("SerialBLEInterface: disable");
 
-#ifdef RAK_BOARD
-  Bluefruit.disconnect(Bluefruit.connHandle());
-#else
-  uint16_t conn_id;
-  if (Bluefruit.getConnectedHandles(&conn_id, 1) > 0) {
-    Bluefruit.disconnect(conn_id);
-  }
-#endif
-
-  Bluefruit.Advertising.restartOnDisconnect(false);
+  disconnect();
   Bluefruit.Advertising.stop();
-  Bluefruit.Advertising.clearData();
-
-  stopAdv();
+  _last_health_check = 0;
 }
 
 size_t SerialBLEInterface::writeFrame(const uint8_t src[], size_t len) {
   if (len > MAX_FRAME_SIZE) {
-    BLE_DEBUG_PRINTLN("writeFrame(), frame too big, len=%d", len);
+    BLE_DEBUG_PRINTLN("writeFrame(), frame too big, len=%u", (unsigned)len);
     return 0;
   }
 
-  if (_isDeviceConnected && len > 0) {
+  bool connected = isConnected();
+  if (connected && len > 0) {
     if (send_queue_len >= FRAME_QUEUE_SIZE) {
       BLE_DEBUG_PRINTLN("writeFrame(), send_queue is full!");
       return 0;
     }
 
-    send_queue[send_queue_len].len = len;  // add to send queue
+    send_queue[send_queue_len].len = len;
     memcpy(send_queue[send_queue_len].buf, src, len);
     send_queue_len++;
-
+    
     return len;
   }
   return 0;
 }
 
-#define  BLE_WRITE_MIN_INTERVAL   60
-
-bool SerialBLEInterface::isWriteBusy() const {
-  return millis() < _last_write + BLE_WRITE_MIN_INTERVAL;   // still too soon to start another write?
-}
-
 size_t SerialBLEInterface::checkRecvFrame(uint8_t dest[]) {
-  if (send_queue_len > 0   // first, check send queue
-    && millis() >= _last_write + BLE_WRITE_MIN_INTERVAL    // space the writes apart
-  ) {
-    _last_write = millis();
-    bleuart.write(send_queue[0].buf, send_queue[0].len);
-    BLE_DEBUG_PRINTLN("writeBytes: sz=%d, hdr=%d", (uint32_t)send_queue[0].len, (uint32_t) send_queue[0].buf[0]);
+  if (send_queue_len > 0) {
+    if (!isConnected()) {
+      BLE_DEBUG_PRINTLN("writeBytes: connection invalid, clearing send queue");
+      send_queue_len = 0;
+    } else {
+      unsigned long now = millis();
+      bool throttle_active = (_last_retry_attempt > 0 && (now - _last_retry_attempt) < BLE_RETRY_THROTTLE_MS);
 
-    send_queue_len--;
-    for (int i = 0; i < send_queue_len; i++) {   // delete top item from queue
-      send_queue[i] = send_queue[i + 1];
-    }
-  } else {
-    int len = bleuart.available();
-    if (len > 0) {
-      bleuart.readBytes(dest, len);
-      BLE_DEBUG_PRINTLN("readBytes: sz=%d, hdr=%d", len, (uint32_t) dest[0]);
-      return len;
+      if (!throttle_active) {
+        Frame frame_to_send = send_queue[0];
+
+        size_t written = bleuart.write(frame_to_send.buf, frame_to_send.len);
+        if (written == frame_to_send.len) {
+          BLE_DEBUG_PRINTLN("writeBytes: sz=%u, hdr=%u", (unsigned)frame_to_send.len, (unsigned)frame_to_send.buf[0]);
+          _last_retry_attempt = 0;
+          shiftSendQueueLeft();
+        } else if (written > 0) {
+          BLE_DEBUG_PRINTLN("writeBytes: partial write, sent=%u of %u, dropping corrupted frame", (unsigned)written, (unsigned)frame_to_send.len);
+          _last_retry_attempt = 0;
+          shiftSendQueueLeft();
+        } else {
+          if (!isConnected()) {
+            BLE_DEBUG_PRINTLN("writeBytes failed: connection lost, dropping frame");
+            _last_retry_attempt = 0;
+            shiftSendQueueLeft();
+          } else {
+            BLE_DEBUG_PRINTLN("writeBytes failed (buffer full), keeping frame for retry");
+            _last_retry_attempt = now;
+          }
+        }
+      }
     }
   }
+  
+  if (recv_queue_len > 0) {
+    size_t len = recv_queue[0].len;
+    memcpy(dest, recv_queue[0].buf, len);
+    
+    BLE_DEBUG_PRINTLN("readBytes: sz=%u, hdr=%u", (unsigned)len, (unsigned)dest[0]);
+    
+    shiftRecvQueueLeft();
+    return len;
+  }
+  
+  // Advertising watchdog: periodically check if advertising is running, restart if not
+  // Only run when truly disconnected (no connection handle), not during connection establishment
+  unsigned long now = millis();
+  if (_isEnabled && !isConnected() && _conn_handle == BLE_CONN_HANDLE_INVALID) {
+    if (now - _last_health_check >= BLE_HEALTH_CHECK_INTERVAL) {
+      _last_health_check = now;
+      
+      if (!isAdvertising()) {
+        BLE_DEBUG_PRINTLN("SerialBLEInterface: advertising watchdog - advertising stopped, restarting");
+        Bluefruit.Advertising.start(0);
+      }
+    }
+  }
+  
   return 0;
 }
 
-bool SerialBLEInterface::isConnected() const {
-  return _isDeviceConnected;
+void SerialBLEInterface::onBleUartRX(uint16_t conn_handle) {
+  if (!instance) {
+    return;
+  }
+  
+  if (instance->_conn_handle != conn_handle || !instance->isConnected()) {
+    while (instance->bleuart.available() > 0) {
+      instance->bleuart.read();
+    }
+    return;
+  }
+  
+  while (instance->bleuart.available() > 0) {
+    if (instance->recv_queue_len >= FRAME_QUEUE_SIZE) {
+      while (instance->bleuart.available() > 0) {
+        instance->bleuart.read();
+      }
+      BLE_DEBUG_PRINTLN("onBleUartRX: recv queue full, dropping data");
+      break;
+    }
+    
+    int avail = instance->bleuart.available();
+    
+    if (avail > MAX_FRAME_SIZE) {
+      BLE_DEBUG_PRINTLN("onBleUartRX: WARN: BLE RX overflow, avail=%d, draining all", avail);
+      uint8_t drain_buf[BLE_RX_DRAIN_BUF_SIZE];
+      while (instance->bleuart.available() > 0) {
+        int chunk = instance->bleuart.available() > BLE_RX_DRAIN_BUF_SIZE ? BLE_RX_DRAIN_BUF_SIZE : instance->bleuart.available();
+        instance->bleuart.readBytes(drain_buf, chunk);
+      }
+      continue;
+    }
+    
+    int read_len = avail;
+    instance->recv_queue[instance->recv_queue_len].len = read_len;
+    instance->bleuart.readBytes(instance->recv_queue[instance->recv_queue_len].buf, read_len);
+    instance->recv_queue_len++;
+  }
+}
+
+bool SerialBLEInterface::isConnected() const {
+  return _isDeviceConnected && Bluefruit.connected() > 0;
+}
+
+bool SerialBLEInterface::isWriteBusy() const {
+  return send_queue_len >= (FRAME_QUEUE_SIZE * 2 / 3);
 }

src/helpers/nrf52/SerialBLEInterface.h

@@ -11,41 +11,60 @@ class SerialBLEInterface : public BaseSerialInterface {
   BLEUart bleuart;
   bool _isEnabled;
   bool _isDeviceConnected;
-  unsigned long _last_write;
+  uint16_t _conn_handle;
+  unsigned long _last_health_check;
+  unsigned long _last_retry_attempt;
 
   struct Frame {
     uint8_t len;
     uint8_t buf[MAX_FRAME_SIZE];
   };
 
-  #define FRAME_QUEUE_SIZE  4
-  int send_queue_len;
+  #define FRAME_QUEUE_SIZE  12
+  
+  uint8_t send_queue_len;
   Frame send_queue[FRAME_QUEUE_SIZE];
+  
+  uint8_t recv_queue_len;
+  Frame recv_queue[FRAME_QUEUE_SIZE];
 
-  void clearBuffers() { send_queue_len = 0; }
+  void clearBuffers();
+  void shiftSendQueueLeft();
+  void shiftRecvQueueLeft();
+  bool isValidConnection(uint16_t handle, bool requireWaitingForSecurity = false) const;
+  bool isAdvertising() const;
   static void onConnect(uint16_t connection_handle);
   static void onDisconnect(uint16_t connection_handle, uint8_t reason);
   static void onSecured(uint16_t connection_handle);
+  static bool onPairingPasskey(uint16_t connection_handle, uint8_t const passkey[6], bool match_request);
+  static void onPairingComplete(uint16_t connection_handle, uint8_t auth_status);
+  static void onBLEEvent(ble_evt_t* evt);
+  static void onBleUartRX(uint16_t conn_handle);
 
 public:
   SerialBLEInterface() {
     _isEnabled = false;
     _isDeviceConnected = false;
-    _last_write = 0;
+    _conn_handle = BLE_CONN_HANDLE_INVALID;
+    _last_health_check = 0;
+    _last_retry_attempt = 0;
     send_queue_len = 0;
+    recv_queue_len = 0;
   }
 
-  void startAdv();
-  void stopAdv();
-  void begin(const char* device_name, uint32_t pin_code);
+  /**
+   * init the BLE interface.
+   * @param prefix   a prefix for the device name
+   * @param name  IN/OUT - a name for the device (combined with prefix). If "@@MAC", is modified and returned
+   * @param pin_code   the BLE security pin
+   */
+  void begin(const char* prefix, char* name, uint32_t pin_code);
 
-  // BaseSerialInterface methods
+  void disconnect();
   void enable() override;
   void disable() override;
   bool isEnabled() const override { return _isEnabled; }
-
   bool isConnected() const override;
-
   bool isWriteBusy() const override;
   size_t writeFrame(const uint8_t src[], size_t len) override;
   size_t checkRecvFrame(uint8_t dest[]) override;

src/helpers/radiolib/CustomLR1110.h

@@ -10,7 +10,7 @@ class CustomLR1110 : public LR1110 {
     size_t getPacketLength(bool update) override {
       size_t len = LR1110::getPacketLength(update);
       if (len == 0 && getIrqStatus() & RADIOLIB_LR11X0_IRQ_HEADER_ERR) {
-        // we've just recieved a corrupted packet
+        // we've just received a corrupted packet
         // this may have triggered a bug causing subsequent packets to be shifted
         // call standby() to return radio to known-good state
         // recvRaw will call startReceive() to restart rx

src/helpers/radiolib/CustomSX1262.h

@@ -76,6 +76,14 @@ class CustomSX1262 : public SX1262 {
       setRfSwitchPins(SX126X_RXEN, SX126X_TXEN);
   #endif 
 
+  // for improved RX with Heltec v4
+  #ifdef SX126X_REGISTER_PATCH
+    uint8_t r_data = 0;
+    readRegister(0x8B5, &r_data, 1);
+    r_data |= 0x01;
+    writeRegister(0x8B5, &r_data, 1);
+  #endif
+
       return true;  // success
     }
 

src/helpers/radiolib/CustomSX1262Wrapper.h

@@ -19,4 +19,7 @@ public:
     int sf = ((CustomSX1262 *)_radio)->spreadingFactor;
     return packetScoreInt(snr, sf, packet_len);
   }
+  virtual void powerOff() override {
+    ((CustomSX1262 *)_radio)->sleep(false);
+  }
 };

src/helpers/radiolib/RadioLibWrappers.cpp

@@ -105,6 +105,7 @@ int RadioLibWrapper::recvRaw(uint8_t* bytes, int sz) {
       if (err != RADIOLIB_ERR_NONE) {
         MESH_DEBUG_PRINTLN("RadioLibWrapper: error: readData(%d)", err);
         len = 0;
+        n_recv_errors++;
       } else {
       //  Serial.print("  readData() -> "); Serial.println(len);
         n_recv++;
@@ -137,6 +138,7 @@ bool RadioLibWrapper::startSendRaw(const uint8_t* bytes, int len) {
   }
   MESH_DEBUG_PRINTLN("RadioLibWrapper: error: startTransmit(%d)", err);
   idle();   // trigger another startRecv()
+  _board->onAfterTransmit();
   return false;
 }
 

src/helpers/radiolib/RadioLibWrappers.h

@@ -7,7 +7,7 @@ class RadioLibWrapper : public mesh::Radio {
 protected:
   PhysicalLayer* _radio;
   mesh::MainBoard* _board;
-  uint32_t n_recv, n_sent;
+  uint32_t n_recv, n_sent, n_recv_errors;
   int16_t _noise_floor, _threshold;
   uint16_t _num_floor_samples;
   int32_t _floor_sample_sum;
@@ -21,6 +21,7 @@ public:
   RadioLibWrapper(PhysicalLayer& radio, mesh::MainBoard& board) : _radio(&radio), _board(&board) { n_recv = n_sent = 0; }
 
   void begin() override;
+  virtual void powerOff() { _radio->sleep(); }
   int recvRaw(uint8_t* bytes, int sz) override;
   uint32_t getEstAirtimeFor(int len_bytes) override;
   bool startSendRaw(const uint8_t* bytes, int len) override;
@@ -44,8 +45,9 @@ public:
   void loop() override;
 
   uint32_t getPacketsRecv() const { return n_recv; }
+  uint32_t getPacketsRecvErrors() const { return n_recv_errors; }
   uint32_t getPacketsSent() const { return n_sent; }
-  void resetStats() { n_recv = n_sent = 0; }
+  void resetStats() { n_recv = n_sent = n_recv_errors = 0; }
 
   virtual float getLastRSSI() const override;
   virtual float getLastSNR() const override;

src/helpers/sensors/EnvironmentSensorManager.cpp

@@ -42,7 +42,7 @@ static Adafruit_BME280 BME280;
 #endif
 #define TELEM_BMP280_SEALEVELPRESSURE_HPA (1013.25)    // Athmospheric pressure at sea level
 #include <Adafruit_BMP280.h>
-static Adafruit_BMP280 BMP280;
+static Adafruit_BMP280 BMP280(TELEM_WIRE);
 #endif
 
 #if ENV_INCLUDE_SHTC3
@@ -58,6 +58,7 @@ static SensirionI2cSht4x SHT4X;
 
 #if ENV_INCLUDE_LPS22HB
 #include <Arduino_LPS22HB.h>
+LPS22HBClass LPS22HB(*TELEM_WIRE);
 #endif
 
 #if ENV_INCLUDE_INA3221
@@ -178,10 +179,27 @@ bool EnvironmentSensorManager::begin() {
   }
   #endif
 
+  #if ENV_INCLUDE_BME680
+  if (BME680.begin(TELEM_BME680_ADDRESS, TELEM_WIRE)) {
+    MESH_DEBUG_PRINTLN("Found BME680 at address: %02X", TELEM_BME680_ADDRESS);
+    BME680_initialized = true;
+  } else {
+    BME680_initialized = false;
+    MESH_DEBUG_PRINTLN("BME680 was not found at I2C address %02X", TELEM_BME680_ADDRESS);
+  }
+  #endif
+
   #if ENV_INCLUDE_BME280
   if (BME280.begin(TELEM_BME280_ADDRESS, TELEM_WIRE)) {
     MESH_DEBUG_PRINTLN("Found BME280 at address: %02X", TELEM_BME280_ADDRESS);
     MESH_DEBUG_PRINTLN("BME sensor ID: %02X", BME280.sensorID());
+    // Reduce self-heating: single-shot conversions, light oversampling, long standby.
+    BME280.setSampling(Adafruit_BME280::MODE_FORCED,
+                       Adafruit_BME280::SAMPLING_X1,   // temperature
+                       Adafruit_BME280::SAMPLING_X1,   // pressure
+                       Adafruit_BME280::SAMPLING_X1,   // humidity
+                       Adafruit_BME280::FILTER_OFF,
+                       Adafruit_BME280::STANDBY_MS_1000);
     BME280_initialized = true;
   } else {
     BME280_initialized = false;
@@ -201,7 +219,7 @@ bool EnvironmentSensorManager::begin() {
   #endif
 
   #if ENV_INCLUDE_SHTC3
-  if (SHTC3.begin()) {
+  if (SHTC3.begin(TELEM_WIRE)) {
     MESH_DEBUG_PRINTLN("Found sensor: SHTC3");
     SHTC3_initialized = true;
   } else {
@@ -226,7 +244,7 @@ bool EnvironmentSensorManager::begin() {
   #endif
 
   #if ENV_INCLUDE_LPS22HB
-  if (BARO.begin()) {
+  if (LPS22HB.begin()) {
     MESH_DEBUG_PRINTLN("Found sensor: LPS22HB");
     LPS22HB_initialized = true;
   } else {
@@ -266,7 +284,7 @@ bool EnvironmentSensorManager::begin() {
     INA260_initialized = true;
   } else {
     INA260_initialized = false;
-    MESH_DEBUG_PRINTLN("INA260 was not found at I2C address %02X", TELEM_INA219_ADDRESS);
+    MESH_DEBUG_PRINTLN("INA260 was not found at I2C address %02X", TELEM_INA260_ADDRESS);
   }
   #endif
 
@@ -301,16 +319,6 @@ bool EnvironmentSensorManager::begin() {
   }
   #endif
 
-  #if ENV_INCLUDE_BME680
-  if (BME680.begin(TELEM_BME680_ADDRESS, TELEM_WIRE)) {
-    MESH_DEBUG_PRINTLN("Found BME680 at address: %02X", TELEM_BME680_ADDRESS);
-    BME680_initialized = true;
-  } else {
-    BME680_initialized = false;
-    MESH_DEBUG_PRINTLN("BME680 was not found at I2C address %02X", TELEM_BME680_ADDRESS);
-  }
-  #endif
-
   #if ENV_INCLUDE_BMP085
   // First argument is  MODE (aka oversampling)
   // choose ULTRALOWPOWER
@@ -344,12 +352,27 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
     }
     #endif
 
+    #if ENV_INCLUDE_BME680
+    if (BME680_initialized) {
+      if (BME680.performReading()) {
+        telemetry.addTemperature(TELEM_CHANNEL_SELF, BME680.temperature);
+        telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, BME680.humidity);
+        telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BME680.pressure / 100);
+        telemetry.addAltitude(TELEM_CHANNEL_SELF, 44330.0 * (1.0 - pow((BME680.pressure / 100) / TELEM_BME680_SEALEVELPRESSURE_HPA, 0.1903)));
+        telemetry.addAnalogInput(next_available_channel, BME680.gas_resistance);
+        next_available_channel++;
+      }
+    }
+    #endif
+
     #if ENV_INCLUDE_BME280
     if (BME280_initialized) {
-      telemetry.addTemperature(TELEM_CHANNEL_SELF, BME280.readTemperature());
-      telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, BME280.readHumidity());
-      telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BME280.readPressure()/100);
-      telemetry.addAltitude(TELEM_CHANNEL_SELF, BME280.readAltitude(TELEM_BME280_SEALEVELPRESSURE_HPA));
+      if (BME280.takeForcedMeasurement()) {  // trigger a fresh reading in forced mode
+        telemetry.addTemperature(TELEM_CHANNEL_SELF, BME280.readTemperature());
+        telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, BME280.readHumidity());
+        telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BME280.readPressure()/100);
+        telemetry.addAltitude(TELEM_CHANNEL_SELF, BME280.readAltitude(TELEM_BME280_SEALEVELPRESSURE_HPA));
+      }
     }
     #endif
 
@@ -385,8 +408,8 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
 
     #if ENV_INCLUDE_LPS22HB
     if (LPS22HB_initialized) {
-      telemetry.addTemperature(TELEM_CHANNEL_SELF, BARO.readTemperature());
-      telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BARO.readPressure());
+      telemetry.addTemperature(TELEM_CHANNEL_SELF, LPS22HB.readTemperature());
+      telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, LPS22HB.readPressure() * 10); // convert kPa to hPa
     }
     #endif
 
@@ -452,19 +475,6 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
     }
     #endif
 
-    #if ENV_INCLUDE_BME680
-    if (BME680_initialized) {
-      if (BME680.performReading()) {
-        telemetry.addTemperature(TELEM_CHANNEL_SELF, BME680.temperature);
-        telemetry.addRelativeHumidity(TELEM_CHANNEL_SELF, BME680.humidity);
-        telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BME680.pressure / 100);
-        telemetry.addAltitude(TELEM_CHANNEL_SELF, 44330.0 * (1.0 - pow((BME680.pressure / 100) / TELEM_BME680_SEALEVELPRESSURE_HPA, 0.1903)));
-        telemetry.addAnalogInput(next_available_channel, BME680.gas_resistance);
-        next_available_channel++;
-      }
-    }
-    #endif
-
     #if ENV_INCLUDE_BMP085
     if (BMP085_initialized) {
         telemetry.addTemperature(TELEM_CHANNEL_SELF, BMP085.readTemperature());
@@ -521,6 +531,15 @@ bool EnvironmentSensorManager::setSettingValue(const char* name, const char* val
     }
     return true;
   }
+  if (strcmp(name, "gps_interval") == 0) {
+    uint32_t interval_seconds = atoi(value);
+    if (interval_seconds > 0) {
+      gps_update_interval_sec = interval_seconds;
+    } else {
+      gps_update_interval_sec = 1;  // Default to 1 second if 0
+    }
+    return true;
+  }
   #endif
   return false;  // not supported
 }
@@ -548,7 +567,11 @@ void EnvironmentSensorManager::initBasicGPS() {
   delay(1000);
 
   // We'll consider GPS detected if we see any data on Serial1
+#ifdef ENV_SKIP_GPS_DETECT
+  gps_detected = true;
+#else
   gps_detected = (Serial1.available() > 0);
+#endif
 
   if (gps_detected) {
     MESH_DEBUG_PRINTLN("GPS detected");
@@ -563,7 +586,7 @@ void EnvironmentSensorManager::initBasicGPS() {
   gps_active = false; //Set GPS visibility off until setting is changed
 }
 
-// gps code for rak might be moved to MicroNMEALoactionProvider 
+// gps code for rak might be moved to MicroNMEALoactionProvider
 // or make a new location provider ...
 #ifdef RAK_WISBLOCK_GPS
 void EnvironmentSensorManager::rakGPSInit(){
@@ -593,6 +616,7 @@ void EnvironmentSensorManager::rakGPSInit(){
     MESH_DEBUG_PRINTLN("No GPS found");
     gps_active = false;
     gps_detected = false;
+    Serial1.end();
     return;
   }
 
@@ -631,8 +655,7 @@ bool EnvironmentSensorManager::gpsIsAwake(uint8_t ioPin){
 
     _location = &RAK12500_provider;
     return true;
-  }
-  else if(Serial1){
+  } else if (Serial1.available()) {
     MESH_DEBUG_PRINTLN("Serial GPS init correctly and is turned on");
     if(PIN_GPS_EN){
       gpsResetPin = PIN_GPS_EN;
@@ -642,6 +665,8 @@ bool EnvironmentSensorManager::gpsIsAwake(uint8_t ioPin){
     gps_detected = true;
     return true;
   }
+
+  pinMode(ioPin, INPUT);
   MESH_DEBUG_PRINTLN("GPS did not init with this IO pin... try the next");
   return false;
 }
@@ -683,8 +708,8 @@ void EnvironmentSensorManager::loop() {
 
   #if ENV_INCLUDE_GPS
   _location->loop();
-
   if (millis() > next_gps_update) {
+
     if(gps_active){
     #ifdef RAK_WISBLOCK_GPS
     if ((i2cGPSFlag || serialGPSFlag) && _location->isValid()) {
@@ -704,7 +729,7 @@ void EnvironmentSensorManager::loop() {
     }
     #endif
     }
-    next_gps_update = millis() + 1000;
+    next_gps_update = millis() + (gps_update_interval_sec * 1000);
   }
   #endif
 }

src/helpers/sensors/EnvironmentSensorManager.h

@@ -25,6 +25,7 @@ protected:
 
   bool gps_detected = false;
   bool gps_active = false;
+  uint32_t gps_update_interval_sec = 1;  // Default 1 second
 
   #if ENV_INCLUDE_GPS
   LocationProvider* _location;

src/helpers/sensors/LPPDataHelpers.h

@@ -113,7 +113,7 @@ public:
     return _pos <= _len;
   }
   bool readCurrent(float& amps) {
-    amps = getFloat(&_buf[_pos], 2, 1000, false); _pos += 2;
+    amps = getFloat(&_buf[_pos], 2, 1000, true); _pos += 2;
     return _pos <= _len;
   }
   bool readPower(float& watts) {

src/helpers/ui/GxEPDDisplay.cpp

@@ -1,13 +1,26 @@
 
 #include "GxEPDDisplay.h"
 
+#ifdef EXP_PIN_BACKLIGHT
+  #include <PCA9557.h>
+  extern PCA9557 expander;
+#endif
+
 #ifndef DISPLAY_ROTATION
   #define DISPLAY_ROTATION 3
 #endif
 
+#ifdef ESP32
+  SPIClass SPI1 = SPIClass(FSPI);
+#endif
+
 bool GxEPDDisplay::begin() {
   display.epd2.selectSPI(SPI1, SPISettings(4000000, MSBFIRST, SPI_MODE0));
+#ifdef ESP32
+  SPI1.begin(PIN_DISPLAY_SCLK, PIN_DISPLAY_MISO, PIN_DISPLAY_MOSI, PIN_DISPLAY_CS);
+#else
   SPI1.begin();
+#endif
   display.init(115200, true, 2, false);
   display.setRotation(DISPLAY_ROTATION);
   setTextSize(1);  // Default to size 1
@@ -27,6 +40,8 @@ void GxEPDDisplay::turnOn() {
   if (!_init) begin();
 #if defined(DISP_BACKLIGHT) && !defined(BACKLIGHT_BTN)
   digitalWrite(DISP_BACKLIGHT, HIGH);
+#elif defined(EXP_PIN_BACKLIGHT) && !defined(BACKLIGHT_BTN)
+  expander.digitalWrite(EXP_PIN_BACKLIGHT, HIGH);
 #endif
   _isOn = true;
 }
@@ -34,6 +49,8 @@ void GxEPDDisplay::turnOn() {
 void GxEPDDisplay::turnOff() {
 #if defined(DISP_BACKLIGHT) && !defined(BACKLIGHT_BTN)
   digitalWrite(DISP_BACKLIGHT, LOW);
+#elif defined(EXP_PIN_BACKLIGHT) && !defined(BACKLIGHT_BTN)
+  expander.digitalWrite(EXP_PIN_BACKLIGHT, LOW);
 #endif
   _isOn = false;
 }

src/helpers/ui/SSD1306Display.cpp

@@ -7,6 +7,10 @@ bool SSD1306Display::i2c_probe(TwoWire& wire, uint8_t addr) {
 }
 
 bool SSD1306Display::begin() {
+  if (!_isOn) {
+    if (_peripher_power) _peripher_power->claim();
+    _isOn = true;
+  }
   #ifdef DISPLAY_ROTATION
   display.setRotation(DISPLAY_ROTATION);
   #endif
@@ -14,13 +18,25 @@ bool SSD1306Display::begin() {
 }
 
 void SSD1306Display::turnOn() {
+  if (!_isOn) {
+    if (_peripher_power) _peripher_power->claim();
+    _isOn = true;  // set before begin() to prevent double claim
+    if (_peripher_power) begin();  // re-init display after power was cut
+  }
   display.ssd1306_command(SSD1306_DISPLAYON);
-  _isOn = true;
 }
 
 void SSD1306Display::turnOff() {
   display.ssd1306_command(SSD1306_DISPLAYOFF);
-  _isOn = false;
+  if (_isOn) {
+    if (_peripher_power) {
+#if PIN_OLED_RESET >= 0
+      digitalWrite(PIN_OLED_RESET, LOW);
+#endif
+      _peripher_power->release();
+    }
+    _isOn = false;
+  }
 }
 
 void SSD1306Display::clear() {

src/helpers/ui/SSD1306Display.h

@@ -5,6 +5,7 @@
 #include <Adafruit_GFX.h>
 #define SSD1306_NO_SPLASH
 #include <Adafruit_SSD1306.h>
+#include <helpers/RefCountedDigitalPin.h>
 
 #ifndef PIN_OLED_RESET
   #define PIN_OLED_RESET        21 // Reset pin # (or -1 if sharing Arduino reset pin)
@@ -18,10 +19,16 @@ class SSD1306Display : public DisplayDriver {
   Adafruit_SSD1306 display;
   bool _isOn;
   uint8_t _color;
+  RefCountedDigitalPin* _peripher_power;
 
   bool i2c_probe(TwoWire& wire, uint8_t addr);
 public:
-  SSD1306Display() : DisplayDriver(128, 64), display(128, 64, &Wire, PIN_OLED_RESET) { _isOn = false; }
+  SSD1306Display(RefCountedDigitalPin* peripher_power=NULL) : DisplayDriver(128, 64), 
+      display(128, 64, &Wire, PIN_OLED_RESET),
+      _peripher_power(peripher_power)
+  {
+    _isOn = false; 
+  }
   bool begin();
 
   bool isOn() override { return _isOn; }

src/helpers/ui/ST7789Display.cpp

@@ -10,8 +10,13 @@
 #define Y_OFFSET 1  // Vertical offset to prevent top row cutoff
 #endif
 
-#define SCALE_X  1.875f     // 240 / 128
-#define SCALE_Y  2.109375f   // 135 / 64
+#ifdef HELTEC_VISION_MASTER_T190
+  #define SCALE_X  2.5f        // 320 / 128
+  #define SCALE_Y  2.65625f    // 170 / 64
+#else
+  #define SCALE_X  1.875f      // 240 / 128
+  #define SCALE_Y  2.109375f   // 135 / 64
+#endif
 
 bool ST7789Display::begin() {
   if(!_isOn) {

src/helpers/ui/ST7789LCDDisplay.cpp

@@ -23,12 +23,19 @@ bool ST7789LCDDisplay::begin() {
   if (!_isOn) {
     if (_peripher_power) _peripher_power->claim();
 
-    pinMode(PIN_TFT_LEDA_CTL, OUTPUT);
-    digitalWrite(PIN_TFT_LEDA_CTL, HIGH);
-    digitalWrite(PIN_TFT_RST, HIGH);
+    if (PIN_TFT_LEDA_CTL != -1) {
+      pinMode(PIN_TFT_LEDA_CTL, OUTPUT);
+      digitalWrite(PIN_TFT_LEDA_CTL, HIGH);
+    }
+    if (PIN_TFT_RST != -1) {
+      pinMode(PIN_TFT_RST, OUTPUT);
+      digitalWrite(PIN_TFT_RST, LOW); 
+      delay(10);
+      digitalWrite(PIN_TFT_RST, HIGH);
+    }
 
     // Im not sure if this is just a t-deck problem or not, if your display is slow try this.
-    #ifdef LILYGO_TDECK
+    #if defined(LILYGO_TDECK) || defined(HELTEC_LORA_V4_TFT)
       displaySPI.begin(PIN_TFT_SCL, -1, PIN_TFT_SDA, PIN_TFT_CS);
     #endif
 
@@ -54,9 +61,15 @@ void ST7789LCDDisplay::turnOn() {
 
 void ST7789LCDDisplay::turnOff() {
   if (_isOn) {
-    digitalWrite(PIN_TFT_LEDA_CTL, HIGH);
-    digitalWrite(PIN_TFT_RST, LOW);
-    digitalWrite(PIN_TFT_LEDA_CTL, LOW);
+    if (PIN_TFT_LEDA_CTL != -1) {
+      digitalWrite(PIN_TFT_LEDA_CTL, HIGH);
+    }
+    if (PIN_TFT_RST != -1) {
+      digitalWrite(PIN_TFT_RST, LOW);
+    }
+    if (PIN_TFT_LEDA_CTL != -1) {
+      digitalWrite(PIN_TFT_LEDA_CTL, LOW);
+    }
     _isOn = false;
 
     if (_peripher_power) _peripher_power->release();

src/helpers/ui/ST7789LCDDisplay.h

@@ -8,7 +8,7 @@
 #include <helpers/RefCountedDigitalPin.h>
 
 class ST7789LCDDisplay : public DisplayDriver {
-  #ifdef LILYGO_TDECK
+  #if defined(LILYGO_TDECK) || defined(HELTEC_LORA_V4_TFT)
     SPIClass displaySPI;
   #endif
   Adafruit_ST7789 display;
@@ -25,7 +25,7 @@ public:
   {
     _isOn = false;
   }
-#elif LILYGO_TDECK
+#elif defined(LILYGO_TDECK) || defined(HELTEC_LORA_V4_TFT)
   ST7789LCDDisplay(RefCountedDigitalPin* peripher_power=NULL) : DisplayDriver(128, 64),
       displaySPI(HSPI),
       display(&displaySPI, PIN_TFT_CS, PIN_TFT_DC, PIN_TFT_RST),

variants/ebyte_eora_s3/target.cpp

@@ -75,7 +75,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 

variants/ebyte_eora_s3/target.h

@@ -25,5 +25,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();

variants/generic-e22/target.cpp

@@ -38,7 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 

variants/generic-e22/target.h

@@ -17,5 +17,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();

variants/generic_espnow/target.cpp

@@ -25,7 +25,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   // no-op
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio_driver.setTxPower(dbm);
 }
 

variants/generic_espnow/target.h

@@ -12,5 +12,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();