#define AO_LDR 36 
#define DARK_THRESHOLD 1500 
const float RESISTOR_VALUE = 10000.0; 
float voltage = 0.0;
float resistance = 0.0;
float current = 0.0;
float frequency = 0.0;

void setup() {
  Serial.begin(115200);
}

void loop() {
  unsigned long currentMillis = millis();
  int Kecerahan = analogRead(AO_LDR);
  
  voltage = Kecerahan * (3.3 / 4095.0);
  resistance = (3.3 * RESISTOR_VALUE) / (voltage * (3.3 - voltage) / 10000.0);
  current = voltage / RESISTOR_VALUE;
  frequency = 1 / (2 * (3.3 - voltage));

  
  Serial.print("Kecerahan: ");
  Serial.print(Kecerahan);
  Serial.println(" lux");
  Serial.print("Tegangan: ");
  Serial.print(voltage);
  Serial.print(" V, Hambatan: ");
  Serial.print(resistance);
  Serial.print(" ohm, Arus: ");
  Serial.print(current * 1000); 
  Serial.print(" mA, Frekuensi: ");
  Serial.print(frequency);
  Serial.print(" Hz ");

  
  if (Kecerahan <= DARK_THRESHOLD) {
    Serial.println("TERANG");
  } else {
    Serial.println("GELAP");
  }
  
  delay(1000);
}