// Pin LDR
const int LDR_PIN = A0;

// Nilai resistansi referensi
const float RL10 = 10000.0;

// Nilai konstanta GAMMA
const float GAMMA = 0.7;

void setup() {
  // Inisialisasi serial
  Serial.begin(9600);
}

void loop() {
  // Baca nilai ADC
  int adcValue = analogRead(LDR_PIN);

  // Konversi nilai ADC ke tegangan
  float voltage = (adcValue / 1023.0) * 5.0;

  // Hitung resistansi LDR
  float resistance = (5.0 * (5.0 - voltage)) / voltage;

  // Hitung nilai Lux
  float lux = (1000000.0 * resistance) / (RL10 * pow(10.0, GAMMA));

  // Tampilkan nilai Lux ke serial
  Serial.print("Nilai ADC: ");
  Serial.print(adcValue);
  Serial.print("  Tegangan: ");
  Serial.print(voltage);
  Serial.print("V  Resistensi: ");
  Serial.print(resistance);
  Serial.print(" ohm  Lux: ");
  Serial.println(lux);

  // Delay 1 detik
  delay(1000);
}