 #define LED_RXD         1
 #define LED_LOW_BATTERY 2
 #define LED_ROS_CONNECT 3
+#define LED_WORKING_CHECK 13
 
 /*******************************************************************************
 * Declaration for Battery

  if ((millis()-t_time) >= 500)
  {
    t_time = millis();
    digitalWrite(13, !digitalRead(13));
  }

  if (getPowerInVoltage() < 11.1)


  prev_update_time = millis();

  pinMode(LED_WORKING_CHECK, OUTPUT);

  SerialBT2.begin(57600);

