#define SENSOR_PIN 2
#define RELAY_PIN 3
#define LDR_PIN A0
#define LED_PIN 13


void setup() {
  // put your setup code here, to run once:
pinMode(RELAY_PIN, OUTPUT);
pinMode(SENSOR_PIN, INPUT);
pinMode(LDR_PIN, INPUT);
pinMode(LED_PIN, OUTPUT);
//Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
int sensorValue = digitalRead(SENSOR_PIN);
//Serial.println(sensorValue);
if (sensorValue == HIGH)
{
  digitalWrite(SENSOR_PIN, LOW);
}
else

  digitalWrite(RELAY_PIN, HIGH);

int lampuhidup = digitalRead(LDR_PIN);
Serial.print("Lampu hidup: ");
if (lampuhidup == HIGH)
{
  digitalWrite(LED_PIN , LOW);
}
else

  digitalWrite(LED_PIN , HIGH);

}