Problems with GPIO

Of course that command is assuming the ESP8266’s GPIO pins, NOT the Arduino ones… they are probably NOT directly accessible from that Blynk Sketch.

Nothing to do I can not I tried it but it does not even go

BLYNK_WRITE(V1) {
digitalWrite(5, param.asInt());  // Toggle GPIO pin 5 to the same state as the Button on V0
int gh=0;
gh=digitalRead(5);
if (gh==HIGH){
led3.on();

I have no idea what “it does not even go” means in practice, but I’d simplify this code like this:

BLYNK_WRITE(V1)
{
  int gh=(5, param.asInt());
  if (gh)
  {
    led3.on();
    digitalWrite(5,HIGH);
  }
  else
  {
    led3.off();
    digitalWrite(5,LOW);
  }
}

I’d also add this in void setup():

  pinMode (5,OUTPUT);

Pete.