const int LED1 = 0;
const int LED2 = 3;
const int LED3 = 2;
const int LED4 = 5;
const int Buzz = 1;

String perintah = "";

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(Buzz, OUTPUT);
  Serial.begin(9600);
  Serial.println("opsi =");
  Serial.println("lampu kamar1");
  Serial.println("lampu kamar2");
  Serial.println("lampu WC");
  Serial.println("ruang tamu");
}

void loop() {
  if (Serial.available() > 0) {
    perintah = Serial.readStringUntil('\n');
    perintah.trim();

    if (perintah == "nyalakan lampu kamar1") {
      digitalWrite(LED1, HIGH);
      Buzzer();
     } else if (perintah == "matikan lampu kamar1") {
      digitalWrite(LED1, LOW);
      Buzzer();
    } else if (perintah == "matikan lampu kamar2") {
      digitalWrite(LED2, LOW);
      Buzzer();
    } else if (perintah == "nyalakan lampu kamar2") {
      digitalWrite(LED2, HIGH);
      Buzzer();
    } else if (perintah == "matikan lampu WC") {
      digitalWrite(LED3, LOW);
      Buzzer();
    } else if (perintah == "nyalakan lampu WC") {
      digitalWrite(LED3, HIGH);
      Buzzer();
    } else if (perintah == "matikan lampu ruang tamu") {
      digitalWrite(LED4, LOW);
      Buzzer();
    } else if (perintah == "nyalakan lampu ruang tamu") {
      digitalWrite(LED4, HIGH);
      Buzzer();
    }
  }
}

void Buzzer() {
  digitalWrite(Buzz, HIGH);
  delay(250);
  digitalWrite(Buzz, LOW);
}