Add config version tag

- Add config version tag
- Bump version 8.2.0.4

RELEASENOTES.md

@@ -52,7 +52,7 @@ The following binary downloads have been compiled with ESP8266/Arduino library c
 
 ## Changelog
 
-### Version 8.2.0.3
+### Version 8.2.0.4
 
 - Change HM-10 sensor type detection and add features (#7962)
 - Change light scheme 2,3,4 cycle time speed from 24,48,72,... seconds to 4,6,12,24,36,48,... seconds (#8034)

tasmota/CHANGELOG.md

@@ -1,5 +1,9 @@
 ## Unreleased (development)
 
+### 8.2.0.4 20200417
+
+- Add config version tag
+
 ### 8.2.0.3 20200329
 
 - Change light scheme 2,3,4 cycle time speed from 24,48,72,... seconds to 4,6,12,24,36,48,... seconds (#8034)

tasmota/settings.h

@@ -524,8 +524,9 @@ struct SYSCFG {
   uint8_t       zb_channel;                // F32
   uint8_t       zb_free_byte;              // F33
   uint16_t      pms_wake_interval;         // F34
+  uint8_t       config_version;            // F36
 
-  uint8_t       free_f36[130];             // F36 - Decrement if adding new Setting variables just above and below
+  uint8_t       free_f37[129];             // F37 - Decrement if adding new Setting variables just above and below
 
   // Only 32 bit boundary variables below
   uint16_t      pulse_counter_debounce_low;  // FB8

tasmota/settings.ino

@@ -1337,6 +1337,15 @@ void SettingsDelta(void)
     }
 #endif  // ESP8266
 
+    if (Settings.version < 0x08020004) {
+#ifdef ESP8266
+      Settings.config_version = 0;  // ESP8266 (Has been 0 for long time)
+#endif  // ESP8266
+#ifdef ESP32
+      Settings.config_version = 1;  // ESP32
+#endif  // ESP32
+    }
+
     Settings.version = VERSION;
     SettingsSave(1);
   }

tasmota/tasmota_version.h

@@ -20,7 +20,7 @@
 #ifndef _TASMOTA_VERSION_H_
 #define _TASMOTA_VERSION_H_
 
-const uint32_t VERSION = 0x08020003;
+const uint32_t VERSION = 0x08020004;
 
 // Lowest compatible version
 const uint32_t VERSION_COMPATIBLE = 0x07010006;

tasmota/xdrv_01_webserver.ino

@@ -2509,6 +2509,16 @@ void HandleUploadLoop(void)
       } else {
         valid_settings = (settings_buffer[0] == CONFIG_FILE_SIGN);
       }
+
+      if (valid_settings) {
+#ifdef ESP8266
+        valid_settings = (0 == settings_buffer[0xF36]);  // Settings.config_version
+#endif  // ESP8266
+#ifdef ESP32
+        valid_settings = (1 == settings_buffer[0xF36]);  // Settings.config_version
+#endif  // ESP32
+      }
+
       if (valid_settings) {
         SettingsDefaultSet2();
         memcpy((char*)&Settings +16, settings_buffer +16, sizeof(Settings) -16);