How to add an attachInterrupt using a virtual pin

[PeteKnight]

@rickaves

I mean, if the user pushes the button, some other part of the code starts to run, just like interruptions do

If you are talking about a widget button attached to a virtual pin then the answer is yes, a callback called BLYNK_WRITE(vPinNumber) is triggered.
You can then get the value of the virtual button (normally 0 or 1 in the case of a button widget).

You should read this for more info…

Using Virtual Pins to control physical devices

I thought I’d write a guide about how to use virtual pins with app widgets such as buttons, to control physical devices such as relays, LEDs etc… Why use virtual pins anyway? I’d always recommend using virtual pins over physical pins when developing your code. There are a number of reasons, but here are what I consider to be the main ones: Virtual pins are hardware independent. This means that it’s far easier to port your code from one hardware platform to another in future (when you realise…

Pete.