#define BLYNK_TEMPLATE_ID "TMPL6Apql5hru"
#define BLYNK_TEMPLATE_NAME "Push Button"
#define BLYNK_AUTH_TOKEN "9LMdTfmt5zriIIB_3JWfSZvzscbUlWYT"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>

// Definisi pin
#define BUTTON_PIN 5
#define RELAY_PIN 12
#define LED_PIN 14
#define BUZZER_PIN 27

// Inisialisasi LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Variabel untuk status relay
bool relayStatus = false;

// Informasi Wi-Fi dan Blynk
char auth[] = "9LMdTfmt5zriIIB_3JWfSZvzscbUlWYT"; // Ganti dengan token Blynk Anda
char ssid[] = "Wokwi-GUEST";                      // Ganti dengan nama Wi-Fi Anda
char pass[] = "";                                 // Ganti dengan password Wi-Fi Anda

void setup() {
  // Inisialisasi Serial Monitor
  Serial.begin(115200);

  // Inisialisasi Blynk
  Blynk.begin(auth, ssid, pass);

  // Inisialisasi pin
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Relay Status:");

  // Memastikan semua perangkat mati saat awal
  digitalWrite(RELAY_PIN, LOW);
  digitalWrite(LED_PIN, LOW);
  noTone(BUZZER_PIN);
}

// Fungsi untuk memperbarui status ke Blynk
void updateBlynk() {
  Blynk.virtualWrite(V1, relayStatus ? "ON" : "OFF"); // Kirim status relay ke Blynk
  Blynk.virtualWrite(V0, relayStatus ? 1 : 0);       // Kirim status tombol ke Blynk
}

// Fungsi untuk menangani tombol di aplikasi Blynk
BLYNK_WRITE(V0) {
  relayStatus = param.asInt(); // Ambil nilai dari Blynk (0 atau 1)
  digitalWrite(RELAY_PIN, relayStatus);
  digitalWrite(LED_PIN, relayStatus);

  if (relayStatus) {
    tone(BUZZER_PIN, 1000); // Frekuensi 1000 Hz
  } else {
    noTone(BUZZER_PIN); // Matikan buzzer
  }

  // Perbarui LCD
  lcd.setCursor(0, 1);
  lcd.print(relayStatus ? "ON               " : "OFF              ");

  // Perbarui status di Blynk
  updateBlynk();
}

void loop() {
  Blynk.run(); // Jalankan Blynk

  static bool lastButtonState = HIGH; // Menyimpan status tombol sebelumnya
  bool currentButtonState = digitalRead(BUTTON_PIN);

  // Deteksi tombol ditekan (HIGH ke LOW)
  if (lastButtonState == HIGH && currentButtonState == LOW) {
    relayStatus = !relayStatus; // Toggle status relay
    digitalWrite(RELAY_PIN, relayStatus);
    digitalWrite(LED_PIN, relayStatus);

    if (relayStatus) {
      tone(BUZZER_PIN, 1000); // Frekuensi 1000 Hz
    } else {
      noTone(BUZZER_PIN); // Matikan buzzer
    }

    // Perbarui LCD
    lcd.setCursor(0, 1);
    lcd.print(relayStatus ? "ON               " : "OFF              ");

    // Perbarui status di Blynk
    updateBlynk();
  }

  // Simpan status tombol saat ini
  lastButtonState = currentButtonState;

  // Debounce tombol
  delay(50);
}