/*************************************************************
 * PROYEK IOT: KONTROL 4 LAMPU DENGAN LCD & BLYNK
 *************************************************************/

// Masukkan Template ID dan Name dari Blynk Anda
#define BLYNK_TEMPLATE_ID "TMPL60F6NPBKm"
#define BLYNK_TEMPLATE_NAME "KONTROL 4 LAMPU"

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Inisialisasi LCD I2C (Alamat 0x27, 16 kolom, 2 baris)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Token dari aplikasi Blynk (Device Anda)
char auth[] = "TOKEN_BLYNK_ANDA_DISINI";

// Kredensial WiFi (Hotspot Anda)
char ssid[] = "NAMA_WIFI_ANDA";
char pass[] = "PASSWORD_WIFI_ANDA";

// Definisi Pin Relay
#define RELAY1 D5
#define RELAY2 D6
#define RELAY3 D7
#define RELAY4 D3

// Variabel status lampu
bool statusL1 = false, statusL2 = false, statusL3 = false, statusL4 = false;

// Fungsi update teks LCD
void perbaruiLCD() {
  lcd.setCursor(0, 0); 
  lcd.print("L1:"); lcd.print(statusL1 ? "ON " : "OFF");
  lcd.print(" L2:"); lcd.print(statusL2 ? "ON " : "OFF");

  lcd.setCursor(0, 1); 
  lcd.print("L3:"); lcd.print(statusL3 ? "ON " : "OFF");
  lcd.print(" L4:"); lcd.print(statusL4 ? "ON " : "OFF");
}

void setup() {
  Serial.begin(115200);

  // Mulai LCD
  lcd.init();       
  lcd.backlight();  
  lcd.setCursor(0, 0);
  lcd.print("Sistem Memulai..");
  
  // Set pin relay jadi OUTPUT dan matikan di awal
  pinMode(RELAY1, OUTPUT); digitalWrite(RELAY1, HIGH);
  pinMode(RELAY2, OUTPUT); digitalWrite(RELAY2, HIGH);
  pinMode(RELAY3, OUTPUT); digitalWrite(RELAY3, HIGH);
  pinMode(RELAY4, OUTPUT); digitalWrite(RELAY4, HIGH);

  // Konek ke WiFi dan Blynk
  Blynk.begin(auth, ssid, pass);

  lcd.clear();
  perbaruiLCD();
}

void loop() {
  Blynk.run(); 
}

// Fungsi tombol aplikasi Blynk
BLYNK_WRITE(V1) {
  int pinValue = param.asInt();
  statusL1 = (pinValue == 1);       
  digitalWrite(RELAY1, !pinValue);  
  perbaruiLCD();                    
}

BLYNK_WRITE(V2) {
  int pinValue = param.asInt();
  statusL2 = (pinValue == 1);
  digitalWrite(RELAY2, !pinValue);
  perbaruiLCD();
}

BLYNK_WRITE(V3) {
  int pinValue = param.asInt();
  statusL3 = (pinValue == 1);
  digitalWrite(RELAY3, !pinValue);
  perbaruiLCD();
}

BLYNK_WRITE(V4) {
  int pinValue = param.asInt();
  statusL4 = (pinValue == 1);
  digitalWrite(RELAY4, !pinValue);
  perbaruiLCD();
}