fix mqtt json

src/main.cpp

@@ -206,7 +206,7 @@ void ICACHE_FLASH_ATTR getValuesJSON(char* buffer, const size_t buf_len, int for
 //    root["millis"] = millis();
 //    root["heap"] = ESP.getFreeHeap();
 
-    root.printTo(buffer, sizeof(buffer));
+    root.printTo(buffer, buf_len);
   }
 }
 

src/main.h

@@ -7,6 +7,6 @@
   #define DEBUG_MSG(...)
 #endif
 
-#define FW_VERSION 25
+#define FW_VERSION 26
 
 #endif /* _MAIN_H */