SerialLED.ino

int val = 0;

void setup() {

  Serial.begin(9600);
  pinMode(2, HIGH);
}

void loop() {

  if(Serial.available() > 0) {
    val = Serial.read();
    
    if(val == 48){
      digitalWrite(2, LOW);
      Serial.println("LED OFF");
    }else if(val = 49){
      digitalWrite(2, HIGH);
      Serial.println("LED ON");
    }
  }
}