/*
 * This ESP32 code is created by esp32io.com
 *
 * This ESP32 code is released in the public domain
 *
 * For more detail (instruction and wiring diagram), visit https://esp32io.com/tutorials/esp32-light-sensor
 */

#define LIGHT_SENSOR_PIN 36 // ESP32 pin GIOP36 (ADC0)
#define BUZZER 18

void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  // reads the input on analog pin (value between 0 and 4095)
  int analogValue = analogRead(LIGHT_SENSOR_PIN);

  Serial.print("Analog Value = ");
  Serial.print(analogValue);   // the raw analog reading

  // We'll have a few threshholds, qualitatively determined
  if (analogValue > 500) {
    Serial.println(" => Dark");
    tone(BUZZER, 1000); // Menghasilkan bunyi dengan frekuensi 1000 Hz
          delay(200);         // Durasi bunyi 200 ms
          noTone(BUZZER);     // Matikan bunyi
          delay(100);  
          // Jeda 100 ms sebelum bunyi berikutnya
   
  } else {
    Serial.println(" => Very bright");
  }

  delay(500);
}