const int ledPin = 13;
const int ldrPin = A0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(ldrPin, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int ldrStatus = analogRead(ldrPin);
  Serial.print("Nilai Sensor : ");
  Serial.println(ldrStatus);

  if (ldrStatus <= 300) {
    digitalWrite(ledPin, HIGH);
    Serial.print("LDR is dark , LED is ON");
  } else {
    digitalWrite(ledPin, LOW);
    Serial.print("LDR is light , LED is OFF");
  }
  delay(1000);
}