#define sensor_infrarrojo 21
#define led 19

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

void loop() {
  digitalWrite(led, LOW);
  if(digitalRead(sensor_infrarrojo)==HIGH){
    Serial.println("Obstaculo a 2 cm");
    digitalWrite(led, HIGH);
  }
  delay(10); // this speeds up the simulation
}