Expander Serial

What if I want to listen (EvtPinListener) to change pin state not in Arduino itself but in expander chip ?

In short, you need to make your own listener to do this.

Depending on the type of serial, you might be able to do this with my Shifty library, though it is totally untested - https://github.com/johnnyb/Shifty

is there a lisner delay timer for example if a button is pushed for 30s then send action