#define BLYNK_TEMPLATE_ID "TMPL69oKPEsm8"
#define BLYNK_TEMPLATE_NAME "PushButton"
#define BLYNK_AUTH_TOKEN "ogaGX4LIDG9dmFrbTh_nBTqdF54BwM89"

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

#define BUTTON_PIN 21
#define BUZZER_PIN 23
#define RELAY_PIN 19
#define LED_PIN 22

// Ganti dengan kredensial WiFi Anda
char auth[] = BLYNK_AUTH_TOKEN; 
char ssid[] = "Wokwi-GUEST"; 
char pass[] = ""; 

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C LCD, 16 kolom dan 2 baris bool systemState = false;  // Status sistem(ON / OFF) 
bool systemState = false; // Status sistem (ON/OFF)

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);

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

  // Inisialisasi LCD
  Wire.begin(18, 5);
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Sensor Connect");
  lcd.setCursor(0, 1);
  lcd.print("Tekan Tombol");
}
void loop() {
  static bool lastButtonState = HIGH;  // Status tombol sebelumnya
  bool currentButtonState = digitalRead(BUTTON_PIN);  // Membaca status tombol

  // Deteksi perubahan status tombol
  if (lastButtonState == HIGH && currentButtonState == LOW) {
    // Toggle status sistem
    systemState = !systemState;
    
    if (systemState) {
      digitalWrite(RELAY_PIN, HIGH);  // Mematikan relay
      digitalWrite(LED_PIN, HIGH); // Mematikan LED
      tone(BUZZER_PIN, 1000);  // Mematikan buzzer
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Sensor Nyala");
      lcd.setCursor(0, 1);
      lcd.print("Tekan Untuk OFF");
      Blynk.virtualWrite(V0, HIGH);
    } else { 
      // Jika sistem OFF
      digitalWrite(RELAY_PIN, LOW);  // Mematikan relay
      digitalWrite(LED_PIN, LOW); // Mematikan LED
      noTone(BUZZER_PIN);  // Mematikan buzzer
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Sensor Mati");
      lcd.setCursor(0, 1);
      lcd.print("Tekan Untuk ON");
      Blynk.virtualWrite(V0, LOW);
    }
    delay(200); 
  }
  lastButtonState = currentButtonState;  // Simpan status tombol saat ini
  Blynk.run();
}