#define LDR_PIN 4
#define ECHO_PIN 14
#define TRIG_PIN 12

void setup()
{
  pinMode(LDR_PIN, INPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  Serial.begin(115200);
}

void loop()
{
  Serial.print("Cahaya: ");
  if (digitalRead(LDR_PIN) == LOW) {
    Serial.println("Terang");
  } else {
    Serial.println("Gelap");
  }
  
  // Clear the condition
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  // Generate ultrasonic signal
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  // Read ultrasonic signal
  int duration = pulseIn(ECHO_PIN, HIGH);
  // Calculating the distance
  float distance = duration * 0.034 / 2;

  Serial.print("Jarak: ");
  Serial.print(distance);
  Serial.println(" CM");

  Serial.println();
  delay(1000);
}