#define BLYNK_TEMPLATE_ID "TMPL3zBxNvLT_"
#define BLYNK_TEMPLATE_NAME "Room Automation"
#define BLYNK_AUTH_TOKEN "BL3Cyhy_sh6G6NdFYxyjqxMlOW6OYpLf"

#define BLYNK_PRINT Serial
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
char auth[] = BLYNK_AUTH_TOKEN;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

#define button1_pin 26
#define button2_pin 27
#define button3_pin 33
#define button4_pin 32

#define relay1_pin 13
#define relay2_pin 12
#define relay3_pin 14
#define relay4_pin 2

int relay1_state = 0;
int relay2_state = 0;
int relay3_state = 0;
int relay4_state = 0;

#define button1_vpin    V1
#define button2_vpin    V2
#define button3_vpin    V3
#define button4_vpin    V4

BLYNK_CONNECTED()
{
  Blynk.syncVirtual(button1_vpin);
  Blynk.syncVirtual(button2_vpin);
  Blynk.syncVirtual(button3_vpin);
  Blynk.syncVirtual(button4_vpin);
}

BLYNK_WRITE(button1_vpin) 
{
  relay1_state = param.asInt();
  digitalWrite(relay1_pin, relay1_state);
}

BLYNK_WRITE(button2_vpin) 
{
  relay2_state = param.asInt();
  digitalWrite(relay2_pin, relay2_state);
}

BLYNK_WRITE(button3_vpin) 
{
  relay3_state = param.asInt();
  digitalWrite(relay3_pin, relay3_state);
}

BLYNK_WRITE(button4_vpin) 
{
  relay4_state = param.asInt();
  digitalWrite(relay4_pin, relay4_state);
}
void setup()
{
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Connecting to ");
  LCD.setCursor(0, 1);
  LCD.print("WiFi ");
  Serial.begin(115200);
  pinMode(button1_pin, INPUT_PULLUP);
  pinMode(button2_pin, INPUT_PULLUP);
  pinMode(button3_pin, INPUT_PULLUP);
  pinMode(button4_pin, INPUT_PULLUP);
 
  pinMode(relay1_pin, OUTPUT);
  pinMode(relay2_pin, OUTPUT);
  pinMode(relay3_pin, OUTPUT);
  pinMode(relay4_pin, OUTPUT);
  
  digitalWrite(relay1_pin, HIGH);
  digitalWrite(relay2_pin, HIGH);
  digitalWrite(relay3_pin, HIGH);
  digitalWrite(relay4_pin, HIGH);
  
  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
  timer.run();
  listen_push_buttons();
}
 
void listen_push_buttons()
{
  if(digitalRead(button1_pin) == LOW){
    delay(200);
    control_relay(1);
    Blynk.virtualWrite(button1_vpin, relay1_state);
  }
  
  if(digitalRead(button2_pin) == LOW){
    delay(200);
    control_relay(2);
    Blynk.virtualWrite(button2_vpin, relay2_state);
  }
  
  if(digitalRead(button3_pin) == LOW){
    delay(200);
    control_relay(3);
    Blynk.virtualWrite(button3_vpin, relay3_state);
  }

  if(digitalRead(button4_pin) == LOW){
    delay(200);
    control_relay(4);
    Blynk.virtualWrite(button4_vpin, relay4_state);
  }
}

void control_relay(int relay)
{
  if(relay == 1){
    relay1_state = !relay1_state;
    digitalWrite(relay1_pin, relay1_state);
    if(relay1_state == 0)
    {
    Serial.println("LIGHT OFF ");
    LCD.setCursor(0, 1);
    LCD.println("LIGHT OFF");
    }
    else
    {
    Serial.println("LIGHT ON");
    LCD.setCursor(0, 1);
    LCD.println("LIGHT ON");
    }
  }
  
  if(relay == 2){
    relay2_state = !relay2_state;
    digitalWrite(relay2_pin, relay2_state);
   if(relay2_state == 0)
    {
    Serial.println("FAN OFF ");
    LCD.setCursor(0, 1);
    LCD.println("FAN OFF");
    }
    else
    {
    Serial.println("FAN ON");
    LCD.setCursor(0, 1);
    LCD.println("FAN ON");
    }
  }
  
  if(relay == 3){
    relay3_state = !relay3_state;
    digitalWrite(relay3_pin, relay3_state);
    if(relay3_state == 0)
    {
    Serial.println("TV OFF");
    LCD.setCursor(0, 1);
    LCD.println("TV OFF");
    }
    else
    {
    Serial.println("TV ON");
    LCD.setCursor(0, 1);
    LCD.println("TV ON");
    }
  }

  if(relay == 4){
    relay4_state = !relay4_state;
    digitalWrite(relay4_pin, relay4_state);
    if(relay4_state == 0)
    {
    Serial.println("AC OFF");
    LCD.setCursor(0, 1);
    LCD.println("AC OFF");
    }
    else
    {
    Serial.println("AC ON");
    LCD.setCursor(0, 1);
    LCD.println("AC ON");
    }
  }
}