#define pinled 12
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(pinled, OUTPUT);
}

void loop() {
 if (Serial.available()){
  String cmd = Serial.readString();
  if(cmd== "ON"){
    digitalWrite(pinled, HIGH);
    delay (100);
    //digitalWrite((pinled, LOW);
  }
  else if (cmd== "OFF"){
    digitalWrite(pinled, LOW);
  }
 }
  delay(10); // this speeds up the simulation
}