feat(mqtt): persist observer preferences as JSON

examples/simple_repeater/MyMesh.cpp

@@ -1050,7 +1050,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   // _prefs.agc_reset_interval = 7;  // 28 seconds (secs/4)
 #endif
   // Observer defaults (radio_watchdog, alert.*, snmp.*) moved to applyMQTTDefaults()
-  // in MQTTDefaults.h — they live in /mqtt_prefs now, not NodePrefs.
+  // in MQTTDefaults.h — they live in /mqtt.json now, not NodePrefs.
 
   // bridge defaults
   _prefs.bridge_enabled = 1;    // enabled
@@ -1066,7 +1066,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   _prefs.gps_interval = 0;
   _prefs.advert_loc_policy = ADVERT_LOC_PREFS;
 
-  // MQTT/WiFi/timezone/radio_watchdog defaults live in /mqtt_prefs now (see applyMQTTDefaults).
+  // MQTT/WiFi/timezone/radio_watchdog defaults live in /mqtt.json now (see applyMQTTDefaults).
 
   _prefs.adc_multiplier = 0.0f; // 0.0f means use default board multiplier
 

examples/simple_repeater/MyMesh.h

@@ -285,6 +285,11 @@ public:
   void savePrefs() override {
     _cli.savePrefs(_fs);
   }
+#ifdef WITH_MQTT_BRIDGE
+  bool saveObserverPrefs() override {
+    return _cli.saveObserverPrefs(_fs);
+  }
+#endif
 
   void sendFloodScoped(const TransportKey& scope, mesh::Packet* pkt, uint32_t delay_millis, uint8_t path_hash_size);
 

examples/simple_room_server/MyMesh.cpp

@@ -891,7 +891,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   _prefs.radio_fem_txgain = 0;
 
   // Observer defaults (alert.*, etc.) moved to applyMQTTDefaults() — they live
-  // in /mqtt_prefs now, not NodePrefs.
+  // in /mqtt.json now, not NodePrefs.
 
   // bridge defaults (same as repeater)
   _prefs.bridge_enabled = 1;    // enabled
@@ -900,7 +900,7 @@ MyMesh::MyMesh(mesh::MainBoard &board, mesh::Radio &radio, mesh::MillisecondCloc
   _prefs.bridge_baud = 115200;  // baud rate
   _prefs.bridge_channel = 1;    // channel 1
 
-  // MQTT/WiFi/timezone defaults live in /mqtt_prefs now (see applyMQTTDefaults).
+  // MQTT/WiFi/timezone defaults live in /mqtt.json now (see applyMQTTDefaults).
 
   next_post_idx = 0;
   next_client_idx = 0;

examples/simple_room_server/MyMesh.h

@@ -289,6 +289,11 @@ public:
   void savePrefs() override {
     _cli.savePrefs(_fs);
   }
+#ifdef WITH_MQTT_BRIDGE
+  bool saveObserverPrefs() override {
+    return _cli.saveObserverPrefs(_fs);
+  }
+#endif
 
   void sendFloodScoped(const TransportKey& scope, mesh::Packet* pkt, uint32_t delay_millis, uint8_t path_hash_size);