int pirSensorPin = 3;
int alarmBuzzerPin = 4;
int alarmLedPin = 5;

void setup() {
  pinMode(pirSensorPin, INPUT);
  pinMode(alarmBuzzerPin, OUTPUT);
  pinMode(alarmLedPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int motionDetected = digitalRead(pirSensorPin); // 讀取 PIR 感測器狀態

  if (motionDetected == HIGH) {
    for (int i = 0; i < 5; i++) { // 讓 LED 閃爍 10 次
      tone(alarmBuzzerPin, 1000); // 產生1kHz的音調
      digitalWrite(alarmLedPin, HIGH);
      delay(500);
      noTone(alarmBuzzerPin);    // 停止蜂鳴器
      digitalWrite(alarmLedPin, LOW);
      delay(500);
    }
  } else {
    noTone(alarmBuzzerPin); // 確保蜂鳴器關閉
  }
  Serial.print("Motion Detected: ");
  Serial.println(motionDetected == HIGH ? "YES" : "NO");
}