#define LDR_PIN 34           // Pin analog untuk LDR
#define LED_PIN 13           // Pin digital untuk LED
#define BUZZER_PIN 12        // Pin digital untuk buzzer pasif

const int THRESHOLD = 500;   // Nilai ambang cahaya
const int BUZZER_FREQ = 1000; // Frekuensi bunyi buzzer (dalam Hz)

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT); // tetap diperlukan untuk noTone()
}

void loop() {
  int lightValue = analogRead(LDR_PIN);
  Serial.print("Light Value: ");
  Serial.println(lightValue);

  if (lightValue < THRESHOLD) {
    digitalWrite(LED_PIN, HIGH);
    Serial.println("LED ON");

    tone(BUZZER_PIN, BUZZER_FREQ);  // Aktifkan bunyi buzzer
    Serial.println("Buzzer ON");
  } else {
    digitalWrite(LED_PIN, LOW);
    Serial.println("LED OFF");

    noTone(BUZZER_PIN);             // Hentikan bunyi buzzer
    Serial.println("Buzzer OFF");
  }

  delay(500);  // Tunggu 500ms sebelum ulang semula
}