const float GAMMA = 0.7;
const float RL10 = 50;
#define LED 12


void setup() {
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
}

void loop() {
  int analogValue = analogRead(25);
  float voltage = analogValue * 5/4095.0;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print("Lux: ");
  Serial.println(lux);

  if (lux >= 50){
    Serial.println("Status: Terang  ");
    digitalWrite(LED, LOW);
  } else {
    Serial.println("Status: Gelap ");
    digitalWrite(LED, HIGH);
  }
  delay(500);
}