void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(27, OUTPUT);
   pinMode(14, OUTPUT);
   pinMode(12, OUTPUT);
   pinMode(13, INPUT);

}

void loop() 
  {
  digitalWrite(27, HIGH);
  delay(100);
  digitalWrite(27, LOW);
  }