#define LDR_PIN 12
#define ledMerah 2 
#define ledBiru 4
#define ledPutih 15

// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  // put your setup code here, to run once:
  pinMode(LDR_PIN, INPUT);
  pinMode(ledMerah, OUTPUT);
  pinMode(ledBiru, OUTPUT);
  pinMode(ledPutih, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int analogValue = analogRead(12);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print(lux);

  if (lux < 100){ 
    digitalWrite(ledBiru,HIGH);//untuk lampu indicator untuk cahaya pagi dan sore
    digitalWrite(ledMerah,LOW);
    digitalWrite(ledPutih,LOW);
  }else if (lux > 1000) { 
    digitalWrite(ledMerah,HIGH);//untuk lampu uindicator cahaya siang
    digitalWrite(ledPutih,LOW);
    digitalWrite(ledBiru,LOW);
  }else {
    digitalWrite(ledMerah,LOW);
    digitalWrite(ledPutih,HIGH);
    digitalWrite(ledBiru,LOW);
  }
  delay(1000);
}
// just change the LDR innput sensor went you wanna test it while you play it
// it need a little bit time to process but it works