cardputer: UDP receive - non blocking

[JoDeKa]

Hello,

I want to establish a non blocking UDP
on a cardputer. The cardputer is the server.

The "blocking" method works, but the program stops.

But I can´t manage it for a non-blocking connection:
I tried:
setblocking(false) or
settimeout(0) or
with try: and except:

But nothing works !

Thanks for an answer