#define BLYNK_TEMPLATE_ID "TMPL3oSAnG91F" 
#define BLYNK_TEMPLATE_NAME "Home Automation LBF" 
#define BLYNK_AUTH_TOKEN "D-xdzSrO-MUjjbD6P0wGRMsZpIpGgHws" 
#define BLYNK_PRINT Serial 

#include <WiFi.h> 
#include <WiFiClient.h> 
#include <BlynkSimpleEsp32.h> 
char auth[] = BLYNK_AUTH_TOKEN; 
char ssid[] = "Wokwi-GUEST"; 
char pass[]=""; 

BlynkTimer timer; /
#define button1_pin 12 
#define button2_pin 14 
#define button3_pin 27 

#define relay1_pin 25
#define relay2_pin 33 
#define relay3_pin 32 
int  relay3_state = 0; 
int  relay1_state = 0; 
int  relay2_state = 0; 

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


BLYNK_CONNECTED() {
  Blynk.syncVirtual(button1_vpin); 
  Blynk.syncVirtual(button2_vpin); 
  Blynk.syncVirtual(button3_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); 


void setup() {
  Serial.begin(115200);
  
  pinMode(button1_pin, INPUT_PULLUP);
  pinMode(button2_pin, INPUT_PULLUP);
  pinMode(button3_pin, INPUT_PULLUP);
  pinMode(relay1_pin, OUTPUT);
  pinMode(relay2_pin, OUTPUT);
  pinMode(relay3_pin, OUTPUT);
 
  digitalWrite(relay1_pin, HIGH);
  digitalWrite(relay2_pin, HIGH);
  digitalWrite(relay3_pin, HIGH);
  
  
  Blynk.begin(auth, ssid, pass);
}


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


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

void control_relay(int relay) {
  
  if(relay == 1){ 
    relay1_state = !relay1_state; 
    digitalWrite(relay1_pin, relay1_state); 
    Serial.print("Relay 1 state : ");
    Serial.println(relay1_state);
    
    if(relay1_state == 1){ 
      Serial.println("LED is On");
    }
    else 
      Serial.println("LED is Off");
    delay(50); 
  }
  else if(relay == 2){ 
    relay2_state = !relay2_state;
    digitalWrite(relay2_pin, relay2_state);
    Serial.print("Relay 2 state: ");
    Serial.println(relay2_state);
    if(relay2_state == 1){
      Serial.println("Bulb is On");
    }
    else
      Serial.println("Bulb is Off");
    delay(50);
  }
  else if(relay == 3){ 
    relay3_state = !relay3_state;
    digitalWrite(relay3_pin, relay3_state);
    Serial.print("Relay 3 state: ");
    Serial.println(relay3_state);
    if(relay2_state == 1){
      Serial.println("Fan is On");
    }
    else
      Serial.println("Fan is Off");
    delay(50);
  }
}