int pir = 3;
int pir_val = LOW;


void setup() {
  Serial.begin(9600);
  pinMode(pir, INPUT);
  attachInterrupt(digitalPinToInterrupt(pir), detec, RISING);
}

void loop() {
  int pir_val = digitalRead(pir);
  digitalRead(pir_val);
  if (pir_val == LOW) {
    Serial.println("RAS");
  }
  delay(10000);
}

void detec() {
  int pir_val = digitalRead(pir);
  if (pir_val == HIGH) {
    Serial.println("detection");
  }
}