const int led = 16 ;
const int pir = 19 ;

bool motionDetected = false;


void IRAM_ATTR detectsMovement(){
  Serial.println("movimiento detectado");
  digitalWrite(led, HIGH);
  motionDetected = true;
}

void setup() {  //deir las entradas y  salidas a utilizar
  // put your setup code here, to run once:
  pinMode(led, OUTPUT);
  pinMode(pir, INPUT);
  attachInterrupt(digitalPinToInterrupt(pir), detectsMovement , RISING );
  Serial.begin(9600);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  if(motionDetected)
  {
    motionDetected= false;
    delay(2000);
    digitalWrite(led, LOW);
  }
  delay(1000);
}