int pinMotion = 7;
int buzzer = 3;

void setup() {
  Serial.begin(9600);
  pinMode(pinMotion,INPUT);
  pinMode(buzzer, OUTPUT);

}

void loop() {
  int PIR_State = digitalRead(pinMotion);
  Serial.print("สถานะตรวจจับผู้บุกรุก : ");
  Serial.println(PIR_State);

  if (PIR_State == 1) {
    Serial.println("buzzer : on");
    tone(buzzer, 262, 250);
  }
  if (PIR_State == 0) {
    Serial.println("buzzer : off");
  }
  delay(1000);

}