const int sensorCahayaPin = A0;
const int pwmLedPin = 3;
const int nonPwmLedPin = 2;
const float resistorValue = 10000.0;
const float voltageSupply = 5.0;
const float sensorVoltageDivider = 1023.0;

void setup() {
  Serial.begin(9600);
  pinMode(pwmLedPin, OUTPUT);
  pinMode(nonPwmLedPin, OUTPUT);
  Serial.println("Praktikum Embedded Systems");
  Serial.println("LAB TEKNIK DIGITAL");
}

void loop() {
  int ldrValue = analogRead(sensorCahayaPin);
  Serial.print("Nilai sensor LDR: ");
  Serial.println(ldrValue);
  float voltage = (ldrValue / sensorVoltageDivider) * voltageSupply;
  float resistance = (voltageSupply / voltage - 1) * resistorValue;
  int lux = map(resistance, 0, resistorValue, 0, 255);
  Serial.print("Nilai Sensor Cahaya : ");
  Serial.println(ldrValue);
  Serial.print("Tegangan: ");
  Serial.print(voltage);
  Serial.print("V, Resistansi: ");
  Serial.print(resistance);
  Serial.print(" Ohm, Nilai Lux: ");
  Serial.println(lux);
  analogWrite(pwmLedPin, lux);
  analogWrite(nonPwmLedPin, lux);
  delay(1000);
}