Need help communicating with relay on button app

[PeteKnight]

@Decitryx

I am using an Arduino UNO board with an ESP8266 interfaced with it

Is there a particular reason why you’ve chosen this setup?
It’s far from ideal and will cause you some issues.

@Decitryx

#define ESP8266_BAUD 38400

The Uno doesn’t have enough processing power to emulate a hardware serial port using the SoftwareSerial library at this baud rate. As a result, you’ll suffer disconnections and other issues when communicating with Blynk.

Read this for more info…

Understanding hardware and software serial ports

I’m still seeing frequent posts, mostly from new members of the forum, who are confused about how to add WiFi or Bluetooth connectivity to devices like the Arduino Uno, Nano or Mega, or from people who are trying to use serial communication with some other type of peripheral. I thought I’d try to put together some guidance on how to do this properly. First things first though – if you’re using a device such as an Uno, Nano or Mega that doesn’t have built-in internet connectivity then you shoul…

These functions aren’t being called, so are redundant…

@Decitryx

void with_internet(){
  if (digitalRead(BUTTON) == LOW) {
      relayOnOff;
      // Update Button Widget
      Blynk.virtualWrite(VPIN_BUTTON, toggleState);
    }

}
void without_internet()
{
  if (digitalRead(BUTTON) == LOW) {
      relayOnOff;
    }

}

Thar also means that this function is redundant as well…

@Decitryx

void relayOnOff(int relay){

               if(toggleState == 0){
              digitalWrite(RELAY_PIN, HIGH); // turn on relay 1
              toggleState = 1;
              }
             else{
              digitalWrite(RELAY_PIN, LOW); // turn off relay 1
              toggleState = 0;
              }
             delay(200);
}

In addition, you’ll have no functionality without an internet connection using this code, as you are using Blynk.begin, which is a blocking function. All code execution will stop at the Blynk.begin command if the ESP can’t make a connection with the internet or the Blynk server.

It would be useful to see what your serial monitor shows, and it would help you with debugging if you added some serial print commands to your various functions to allow you to track program flow and variable values.

Pete.