Sleep & nap

[keymuu]

How long are you waiting? If the WDT poscaler in config is set to 32,768 it's going to take around 131 seconds before it wakes-up.

the WDTPS is 128 as in #9, and actually it takes several seconds before that sleep instrucion is reached in the demo code (#9) as well as in the "big" code where I spotted this phenomena/error/failure at first.

I have never seen sleep working, yet...
but I would really like to see it