#define buzzer 18

int ledPin = 13;
int inputPin = 15;
int pirState = LOW;
int val = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(inputPin, INPUT);
  pinMode(buzzer, OUTPUT);

  Serial.begin(9600);
}

void loop() {
  val = digitalRead(inputPin);
  
  if (val == HIGH) {
    digitalWrite(ledPin, HIGH);
    if (pirState == LOW) {
      Serial.println("Gerakan Terdeteksi!");
      pirState = HIGH;
      tone(buzzer, 2000, 500);  // Produce sound at 2000 Hz for 500 ms
    }
  } else {
    digitalWrite(ledPin, LOW);
    if (pirState == HIGH) {  // Only print when state changes
      Serial.println("Tidak ada gerakan");
      pirState = LOW;
    }
  }
}