ArduinoLEDoverWiFi.ino

#define LED_PIN 13
int ledStatus=0;
void setup() {
  pinMode(LED_PIN, OUTPUT);     
  digitalWrite(LED_PIN, LOW);           
  Serial3.begin(9600);
}

void loop() {
  if (Serial3.available() > 0){          //if the user has entered something in the serial monitor
   
    ledStatus = Serial3.parseInt();
    
    if(ledStatus==0)
      digitalWrite(LED_PIN, LOW); 
    else if(ledStatus==1)
      digitalWrite(LED_PIN, HIGH); 
    
  }



}