 void loop(){
   // print the string when a newline arrives:
   if (stringComplete) {
+    flash(200);
     Serial.println(inputString);
     // clear the string:
     inputString = "";

/***************************************************
  Simple serial server
****************************************************/

//serial
String inputString = "";         // a string to hold incoming data

    }
  }
}

// Flash the led for the given time (milliseconds)
void flash(int msecs){
    digitalWrite(led_pin, HIGH);
    delay(msecs);
    digitalWrite(led_pin, LOW);
}
