GPS start fix when requesting telemetry

APC disabled by default, but compiled in

zephcore/ARCHITECTURE.md

@@ -370,7 +370,7 @@ Autonomous operation features:
 - **Region filtering**: `RegionMap` with transport key matching per flood packet
 - **Rate limiting**: 4 requests per 120s (discovery), 4 per 180s (anonymous)
 - **Neighbor tracking**: 16-slot table with RSSI/SNR/name/timestamp
-- **Temporary radio params**: `tempradio` command with auto-revert timer
+- **Temporary radio params**: `tempradio` command applies freq/bw/sf/cr via `LoRaRadioBase::setRadioOverride()` (does not mutate `_prefs`); auto-revert timer calls `clearRadioOverride()` to fall back to saved prefs
 
 ### 6.4 CommonCLI Commands
 

zephcore/Kconfig

@@ -418,7 +418,7 @@ config ZEPHCORE_LORA_RX_DUTY_CYCLE
 
 config ZEPHCORE_APC
 	bool "Adaptive Power Control (APC)"
-	default n
+	default y
 	help
 	  Automatically reduce TX power when echo packets from neighbors
 	  indicate excess SNR margin. Saves battery and reduces channel
@@ -428,8 +428,8 @@ config ZEPHCORE_APC
 	  Uses rogue-filtering: clusters echo SNRs to avoid one badly
 	  placed high-SNR neighbor from over-reducing power.
 
-	  Off by default. Enable with CONFIG_ZEPHCORE_APC=y in board.conf
-	  or via EXTRA_CONF_FILE.
+	  Compiled in by default; disabled at runtime (enable per-node
+	  via CLI "set tx apc" — persisted in prefs).
 
 endmenu
 

zephcore/Repeater_CLI_commands.md

@@ -131,7 +131,7 @@ Regions control which flood packets the repeater forwards. The region tree is hi
 
 | Command | Description |
 |---------|-------------|
-| `tempradio <freq> <bw> <sf> <cr> <timeout_mins>` | Apply temporary radio parameters; automatically reverts after `timeout_mins`. Constraints: freq 150–2500 MHz, bw 7–500 kHz, sf 5–12, cr 5–8 |
+| `tempradio <freq> <bw> <sf> <cr> <timeout_mins>` | Apply temporary radio parameters; automatically reverts after `timeout_mins`. Constraints: freq 150–2500 MHz, bw 7–500 kHz, sf 5–12, cr 5–8. Saved prefs are never mutated — concurrent `set` commands and reboots both restore the real saved values. |
 
 ---
 

zephcore/adapters/gps/ZephyrGPSManager.cpp

@@ -1464,7 +1464,27 @@ void gps_request_fresh_fix(void)
 		k_work_cancel_delayable(&gps_wake_work);
 		gps_start_acquiring();
 	} else if (gps_current_state == GPS_STATE_ACQUIRING) {
-		LOG_DBG("GPS: Fresh fix requested but already acquiring");
+		/* Already acquiring — reschedule the timeout so the caller's
+		 * fresh-fix request gets a full window from now. Otherwise, a
+		 * telemetry request that arrives 25s into a 30s acquire window
+		 * only has 5s left, which in marginal signal usually means the
+		 * chip goes to standby before producing a fix the requester
+		 * could use. Repeater mode uses its own 5min timeout; companion
+		 * mode pre-first-fix has no timeout (nothing to reschedule). */
+		uint32_t timeout_ms = 0;
+		if (gps_repeater_mode) {
+			timeout_ms = GPS_REPEATER_SYNC_TIMEOUT_MS;
+		} else if (first_fix_acquired) {
+			timeout_ms = gps_acquire_timeout_ms;
+		}
+		if (timeout_ms > 0) {
+			LOG_INF("GPS: Fresh fix requested, extending acquire "
+				"timeout by %u ms", timeout_ms);
+			k_work_reschedule(&gps_timeout_work, K_MSEC(timeout_ms));
+		} else {
+			LOG_DBG("GPS: Fresh fix requested, already acquiring "
+				"(no timeout active)");
+		}
 	}
 #endif
 }

zephcore/app/RepeaterMesh.cpp

@@ -309,6 +309,15 @@ int RepeaterMesh::handleRequest(ClientInfo* sender, uint32_t sender_timestamp, u
                 gpos.altitude_mm / 1000.0f);
         }
 
+        /* Wake GPS / extend acquire window so the next telemetry poll has
+         * a fresher fix. In repeater mode GPS is normally off between the
+         * 48h time-sync cycles — this opportunistically rearms acquire
+         * when someone actually cares about our position. No-op if GPS
+         * is disabled in prefs. */
+        if (gps_is_available() && gps_is_enabled()) {
+            gps_request_fresh_fix();
+        }
+
         return 4 + lpp.getSize();
     }
 

zephcore/helpers/CommonCLI.h

@@ -59,7 +59,7 @@ public:
     // Adaptive Power Control
     virtual int8_t getAPCReduction() const { return 0; }
     virtual float getAPCMargin() const { return 0.0f; }
-    virtual bool isAPCEnabled() const { return true; }
+    virtual bool isAPCEnabled() const { return false; }
     virtual void setAPCEnabled(bool en) { (void)en; }
     virtual uint8_t getAPCTargetMargin() const { return 16; }
     virtual void setAPCTargetMargin(uint8_t margin_db) { (void)margin_db; }