hw_timer_t *My_timer = NULL;


int SW1 = 23;

void IRAM_ATTR onTimer() {
 

}

void setup() {
  Serial.begin(115200);
  pinMode(SW1, INPUT);
  servo.attach(26);
  attachInterrupt(SW1, isrSW1, FALLING);
  My_timer = timerBegin(0, 80, true);
  timerAttachInterrupt(My_timer, &onTimer, true);
  timerAlarmWrite(My_timer, 1000000, true);
  timerAlarmEnable(My_timer);
}

void loop() {
int value = digitalRead(SW1);
  
 if (value == HIGH)
  {
    Serial.println("PIR turn on");
    
    servo.write(180);
    delay(500);
    servo.write(0);
    delay(500);
  }

  else
  {
    Serial.println("PIR turn off");
    delay(1000);
  }
}