void checkSerial() {
  char Incoming_value = 0;                //Variable for storing Incoming_value

  if(Serial.available() > 0)
  {
    Incoming_value = Serial.read();      //Read the incoming data and store it into variable Incoming_value
    if (Incoming_value)
      Serial.print((int)Incoming_value);        //Print Value of Incoming_value in Serial monitor
    Serial.print("\n");        //New line
    if(Incoming_value == '1')            //Checks whether value of Incoming_value is equal to 1
      digitalWrite(13, HIGH);  //If value is 1 then LED turns ON
    else if(Incoming_value == '0')       //Checks whether value of Incoming_value is equal to 0
      digitalWrite(13, LOW);   //If value is 0 then LED turns OFF
  }
}