#define LDR_PIN 4
#define LED_PIN 14
#define SPEAKER_PIN 12
#define pinG 13
#define pinB 22
#define pinR 23

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


void setup() {
  pinMode(LDR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(SPEAKER_PIN, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinB, OUTPUT);
  pinMode(pinR, OUTPUT);


}

void loop() {
  int analogValue = analogRead(LDR_PIN);
  float voltage = analogValue / 1024. * 5;
  float resistance = 50000 * voltage / (1 - voltage / 6.33);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  pinMode(SPEAKER_PIN, OUTPUT);

  if (lux <= 300) {    
    digitalWrite(LED_PIN, LOW); 
    analogWrite(pinG, 151);

    
  } else {    
    digitalWrite(LED_PIN, HIGH);   // turn the LED on (HIGH is the voltage level)
    tone(SPEAKER_PIN, HIGH);
    analogWrite(pinR, HIGH);
   }
}
void setColor(int redValue, int greenValue, int blueValue) {
  analogWrite(pinR, redValue);
  analogWrite(pinG, greenValue);
  analogWrite(pinB, blueValue);
}