void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
    pinMode(18,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int state=digitalRead(18);
  if(state==1){
    Serial.println("LED ON");
  } 
  if(state==0){
    Serial.println("LED OFF");
  }
  delay(10); // this speeds up the simulation
}