Only save the changed parts of config to disk.

src/mesh/MeshService.cpp

@@ -90,7 +90,7 @@ void MeshService::loop()
 }
 
 /// The radioConfig object just changed, call this to force the hw to change to the new settings
-bool MeshService::reloadConfig()
+bool MeshService::reloadConfig(int saveWhat)
 {
     // If we can successfully set this radio to these settings, save them to disk
 
@@ -98,7 +98,7 @@ bool MeshService::reloadConfig()
     bool didReset = nodeDB.resetRadioConfig(); // Don't let the phone send us fatally bad settings
 
     configChanged.notifyObservers(NULL); // This will cause radio hardware to change freqs etc
-    nodeDB.saveToDisk();
+    nodeDB.saveToDisk(saveWhat);
 
     return didReset;
 }
@@ -113,7 +113,7 @@ void MeshService::reloadOwner()
     // update everyone else
     if (nodeInfoModule)
         nodeInfoModule->sendOurNodeInfo();
-    nodeDB.saveToDisk();
+    nodeDB.saveToDisk(SEGMENT_DEVICESTATE);
 }
 
 /**

src/mesh/MeshService.h

@@ -66,7 +66,7 @@ class MeshService
     /** The radioConfig object just changed, call this to force the hw to change to the new settings
      * @return true if client devices should be sent a new set of radio configs
      */
-    bool reloadConfig();
+    bool reloadConfig(int saveWhat=SEGMENT_CONFIG | SEGMENT_MODULECONFIG | SEGMENT_DEVICESTATE | SEGMENT_CHANNELS);
 
     /// The owner User record just got updated, update our node DB and broadcast the info into the mesh
     void reloadOwner();

src/mesh/NodeDB.cpp

@@ -128,7 +128,7 @@ bool NodeDB::factoryReset()
     // second, install default state (this will deal with the duplicate mac address issue)
     installDefaultDeviceState();
     installDefaultConfig();
-    // third, write to disk
+    // third, write everything to disk
     saveToDisk();
 #ifdef ARCH_ESP32
     // This will erase what's in NVS including ssl keys, persistant variables and ble pairing
@@ -474,34 +474,41 @@ void NodeDB::saveDeviceStateToDisk()
     }
 }
 
-void NodeDB::saveToDisk()
+void NodeDB::saveToDisk(int saveWhat)
 {
     if (!devicestate.no_save) {
 #ifdef FSCom
         FSCom.mkdir("/prefs");
 #endif
-        saveProto(prefFileName, DeviceState_size, sizeof(devicestate), DeviceState_fields, &devicestate);
+        if (saveWhat && SEGMENT_DEVICESTATE) {
+            saveDeviceStateToDisk();
+        }
 
-        // save all config segments
-        config.has_device = true;
-        config.has_display = true;
-        config.has_lora = true;
-        config.has_position = true;
-        config.has_power = true;
-        config.has_network = true;
-        config.has_bluetooth = true;
-        saveProto(configFileName, LocalConfig_size, sizeof(config), LocalConfig_fields, &config);
+        if (saveWhat && SEGMENT_CONFIG) {
+            config.has_device = true;
+            config.has_display = true;
+            config.has_lora = true;
+            config.has_position = true;
+            config.has_power = true;
+            config.has_network = true;
+            config.has_bluetooth = true;
+            saveProto(configFileName, LocalConfig_size, sizeof(config), LocalConfig_fields, &config);
+        }
 
-        moduleConfig.has_canned_message = true;
-        moduleConfig.has_external_notification = true;
-        moduleConfig.has_mqtt = true;
-        moduleConfig.has_range_test = true;
-        moduleConfig.has_serial = true;
-        moduleConfig.has_store_forward = true;
-        moduleConfig.has_telemetry = true;
-        saveProto(moduleConfigFileName, LocalModuleConfig_size, sizeof(moduleConfig), LocalModuleConfig_fields, &moduleConfig);
+        if (saveWhat && SEGMENT_MODULECONFIG) {
+            moduleConfig.has_canned_message = true;
+            moduleConfig.has_external_notification = true;
+            moduleConfig.has_mqtt = true;
+            moduleConfig.has_range_test = true;
+            moduleConfig.has_serial = true;
+            moduleConfig.has_store_forward = true;
+            moduleConfig.has_telemetry = true;
+            saveProto(moduleConfigFileName, LocalModuleConfig_size, sizeof(moduleConfig), LocalModuleConfig_fields, &moduleConfig);
+        }
 
-        saveChannelsToDisk();
+        if (saveWhat && SEGMENT_CHANNELS) {
+            saveChannelsToDisk();
+        }
     } else {
         DEBUG_MSG("***** DEVELOPMENT MODE - DO NOT RELEASE - not saving to flash *****\n");
     }

src/mesh/NodeDB.h

@@ -13,6 +13,11 @@ DeviceState versions used to be defined in the .proto file but really only this
 #define here.
 */
 
+#define SEGMENT_CONFIG 1
+#define SEGMENT_MODULECONFIG 2
+#define SEGMENT_DEVICESTATE 4
+#define SEGMENT_CHANNELS 8
+
 #define DEVICESTATE_CUR_VER 19
 #define DEVICESTATE_MIN_VER DEVICESTATE_CUR_VER
 
@@ -52,7 +57,7 @@ class NodeDB
     void init();
 
     /// write to flash
-    void saveToDisk(), saveChannelsToDisk(), saveDeviceStateToDisk();
+    void saveToDisk(int saveWhat=SEGMENT_CONFIG | SEGMENT_MODULECONFIG | SEGMENT_DEVICESTATE | SEGMENT_CHANNELS), saveChannelsToDisk(), saveDeviceStateToDisk();
 
     /** Reinit radio config if needed, because either:
      * a) sometimes a buggy android app might send us bogus settings or