const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Praktik Penggunaan Sensor LDR (Photoresistor)...");
  pinMode(12, 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.println("Pembacaan Sensor LDR.....");
  // Serial.print("Voltage   : ");
  // Serial.println(voltage);
  // Serial.print("Resistance: ");
  // Serial.println(resistance);
  Serial.print("Lux       : ");
  Serial.println(lux);
  
  if (lux >= 50) {
    digitalWrite(12, LOW);
    Serial.print("Status: ");
    Serial.println("Terang");
  }else{
    digitalWrite(12, HIGH);
    Serial.print("Status: ");
    Serial.println("Gelap");
  }
  delay(100);
}