* refactor: new helpers/nrf52 dir

* RAK, startOTAUpdate()

examples/companion_radio/main.cpp

@@ -62,7 +62,7 @@
   #include <helpers/CustomSX1262Wrapper.h>
   static ESP32Board board;
 #elif defined(RAK_4631)
-  #include <helpers/RAK4631Board.h>
+  #include <helpers/nrf52/RAK4631Board.h>
   #include <helpers/CustomSX1262Wrapper.h>
   static RAK4631Board board;
 #else

examples/simple_repeater/main.cpp

@@ -19,7 +19,7 @@
 
 /* ------------------------------ Config -------------------------------- */
 
-#define FIRMWARE_VER_TEXT   "v2 (build: 2 Feb 2025)"
+#define FIRMWARE_VER_TEXT   "v3 (build: 2 Feb 2025)"
 
 #ifndef LORA_FREQ
   #define LORA_FREQ   915.0
@@ -65,7 +65,7 @@
   #include <helpers/CustomSX1262Wrapper.h>
   static ESP32Board board;
 #elif defined(RAK_4631)
-  #include <helpers/RAK4631Board.h>
+  #include <helpers/nrf52/RAK4631Board.h>
   #include <helpers/CustomSX1262Wrapper.h>
   static RAK4631Board board;
 #else
@@ -126,6 +126,7 @@ struct NodePrefs {  // persisted to file
 class MyMesh : public mesh::Mesh {
   RadioLibWrapper* my_radio;
   FILESYSTEM* _fs;
+  mesh::MainBoard* _board;
   NodePrefs _prefs;
   uint8_t reply_data[MAX_PACKET_PAYLOAD];
   int num_clients;
@@ -362,8 +363,8 @@ protected:
   }
 
 public:
-  MyMesh(RadioLibWrapper& radio, mesh::MillisecondClock& ms, mesh::RNG& rng, mesh::RTCClock& rtc, mesh::MeshTables& tables)
-     : mesh::Mesh(radio, ms, rng, rtc, *new StaticPoolPacketManager(32), tables)
+  MyMesh(mesh::MainBoard& board, RadioLibWrapper& radio, mesh::MillisecondClock& ms, mesh::RNG& rng, mesh::RTCClock& rtc, mesh::MeshTables& tables)
+     : mesh::Mesh(radio, ms, rng, rtc, *new StaticPoolPacketManager(32), tables), _board(&board)
   {
     my_radio = &radio;
     num_clients = 0;
@@ -442,6 +443,12 @@ public:
       } else {
         strcpy(reply, "ERR: clock cannot go backwards");
       }
+    } else if (memcmp(command, "start ota", 9) == 0) {
+      if (_board->startOTAUpdate()) {
+        strcpy(reply, "OK");
+      } else {
+        strcpy(reply, "Error");
+      }
     } else if (memcmp(command, "clock", 5) == 0) {
       uint32_t now = getRTCClock()->getCurrentTime();
       DateTime dt = DateTime(now);
@@ -494,7 +501,7 @@ public:
     } else if (memcmp(command, "ver", 3) == 0) {
       strcpy(reply, FIRMWARE_VER_TEXT);
     } else {
-      sprintf(reply, "Unknown: %s (commands: reboot, advert, clock, set, ver)", command);
+      sprintf(reply, "Unknown: %s (commands: reboot, advert, clock, set, ver, password, start ota)", command);
     }
   }
 };
@@ -516,7 +523,7 @@ ESP32RTCClock rtc_clock;
 VolatileRTCClock rtc_clock; 
 #endif
 
-MyMesh the_mesh(*new WRAPPER_CLASS(radio, board), *new ArduinoMillis(), fast_rng, rtc_clock, tables);
+MyMesh the_mesh(board, *new WRAPPER_CLASS(radio, board), *new ArduinoMillis(), fast_rng, rtc_clock, tables);
 
 void halt() {
   while (1) ;

examples/simple_room_server/main.cpp

@@ -74,7 +74,7 @@
   #include <helpers/CustomSX1262Wrapper.h>
   static ESP32Board board;
 #elif defined(RAK_4631)
-  #include <helpers/RAK4631Board.h>
+  #include <helpers/nrf52/RAK4631Board.h>
   #include <helpers/CustomSX1262Wrapper.h>
   static RAK4631Board board;
 #else

examples/simple_secure_chat/main.cpp

@@ -61,7 +61,7 @@
   #include <helpers/CustomSX1262Wrapper.h>
   static ESP32Board board;
 #elif defined(RAK_4631)
-  #include <helpers/RAK4631Board.h>
+  #include <helpers/nrf52/RAK4631Board.h>
   #include <helpers/CustomSX1262Wrapper.h>
   static RAK4631Board board;
 #else

platformio.ini

@@ -315,8 +315,10 @@ lib_deps =
 
 [rak4631]
 extends = nrf52840_base
+platform = https://github.com/maxgerhardt/platform-nordicnrf52.git#rak
 board = wiscore_rak4631
 board_check = true
+build_src_filter = ${nrf52840_base.build_src_filter}  +<helpers/nrf52/*.cpp>
 build_flags = ${nrf52840_base.build_flags}
   -D RAK_4631
   -D RADIO_CLASS=CustomSX1262

src/MeshCore.h

@@ -41,6 +41,7 @@ public:
   virtual void onAfterTransmit() { }
   virtual void reboot() = 0;
   virtual uint8_t getStartupReason() const = 0;
+  virtual bool startOTAUpdate() { return false; }   // not supported
 };
 
 }

src/helpers/nrf52/RAK4631Board.cpp

@@ -0,0 +1,63 @@
+#include <Arduino.h>
+#include "RAK4631Board.h"
+
+#include <bluefruit.h>
+#include <Wire.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");
+}
+
+bool RAK4631Board::startOTAUpdate() {
+    // 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("RAK4631_OTA");
+
+    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
+
+  return true;
+}

src/helpers/nrf52/RAK4631Board.h

@@ -3,8 +3,6 @@
 #include <MeshCore.h>
 #include <Arduino.h>
 
-#if defined(NRF52_PLATFORM)
-
 // LoRa radio module pins for RAK4631
 #define  P_LORA_DIO_1   47
 #define  P_LORA_NSS     42
@@ -61,6 +59,6 @@ public:
   void reboot() override {
     NVIC_SystemReset();
   }
-};
 
-#endif
+  bool startOTAUpdate() override;
+};