byte ldr = A7;
byte led = 3;
int nilai;

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

void loop() {
  nilai= analogRead(ldr);
  Serial.print("Nilai LDR : ");
  Serial.println(nilai);

  if(nilai < 1000){
    digitalWrite(led, HIGH);
    Serial.println("Keadaan terang, lampu menyala");
  }else{
    digitalWrite(led, LOW);
    delay(500);
    Serial.println("Keadaan gelap, lampu mati");
  }
  delay(200);
}