#define led 23
const float GAMMA = 0.7;
const float RL10 = 33;

void setup()
{
  Serial.begin(9600);
  pinMode(led, OUTPUT);

}

void loop()
{
  ldr();
  delay(500);
}


void ldr(){
int analogValue = analogRead(26);
  float voltage = analogValue / 4096. * 3.3;
  float resistance = 2000 * voltage / (1 - voltage / 3.3);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print("Room: ");
   if (lux > 50) {
    digitalWrite(led, HIGH);
    Serial.print("Light! ");
  } else {
    digitalWrite(led, LOW);
    Serial.print("Dark  ");
  }
  Serial.print("Lux: ");
  Serial.println(lux);
delay(1000);
}