feat: added validation for BLE address

src/Settings.h

@@ -110,7 +110,7 @@ struct Settings {
       // 1 - manual, 2 - ds18b20, 3 - ble
       byte type = 1;
       byte pin = SENSOR_INDOOR_PIN_DEFAULT;
-      char bleAddresss[18];
+      char bleAddresss[18] = "00:00:00:00:00:00";
       float offset = 0.0f;
     } indoor;
   } sensors;