#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6SNgPOsOQ"
#define BLYNK_TEMPLATE_NAME "4 relay"
#define BLYNK_AUTH_TOKEN "RIhFqFNCjmTzYwESRQ-6ms6x0aq67Bba"

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


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

#define relay1 22
#define relay2 21
#define relay3 19
#define relay4 18
int data;
int data1;
int data2;
int data3;

String a;
String b;
String c;
String d;

BLYNK_WRITE(V0)
{
  data = param.asInt();
  if(data == 1){      
    digitalWrite (relay1, HIGH);          
    Blynk.virtualWrite(V4, 1);
    Blynk.virtualWrite(V8, "Relay 1 ON");
    a = "Relay 1 ON";
  }
  else{             
    digitalWrite (relay1, LOW);    
    Blynk.virtualWrite(V4, 0);
     a = "Relay 1 OFF";
  }
}

BLYNK_WRITE(V1)
{
  data1 = param.asInt();
  if(data1 == 1){      
    digitalWrite (relay2, HIGH);          
    Blynk.virtualWrite(V5, 1);
     b = "Relay 2 ON";
  }
  else{             
    digitalWrite (relay2, LOW);    
    Blynk.virtualWrite(V5, 0);
    b = "Relay 2 OFF";
  }
}

BLYNK_WRITE(V2)
{
  data2 = param.asInt();
  if(data2 == 1){      
    digitalWrite (relay3, HIGH);          
    Blynk.virtualWrite(V6, 1);
    c = "Relay 3 ON";
  }
  else{             
    digitalWrite (relay3, LOW);    
    Blynk.virtualWrite(V6, 0);
    c = "Relay 3 OFF";
  }
}

BLYNK_WRITE(V3)
{
  data3 = param.asInt();
  if(data3 == 1){      
    digitalWrite (relay4, HIGH);          
    Blynk.virtualWrite(V7, 1);
    d = "Relay 4 ON";
  }
  else{             
    digitalWrite (relay4, LOW);    
    Blynk.virtualWrite(V7, 0);
    d = "Relay 4 OFF";
  }
}

void setup() {
  // put your setup code here, to run once:
  pinMode (relay1, OUTPUT);
  pinMode (relay2, OUTPUT);
  pinMode (relay3, OUTPUT);
  pinMode (relay4, OUTPUT);  
  Blynk.begin(auth, ssid, pass);
}

void loop() {
  Blynk.run();  
  Blynk.virtualWrite(V8, a, ", ", b, ", ", c, ", ", d);
}