No persistent watch

[Mrono]

There is no option to persistently watch and initiate a callback each time it is pressed as it is currently a one-shot watch.

[fivdi]

Yes, this is currently the case. The main reason for this is to enable software debouncing for switches and buttons that are not hardware debounced. After the software debouncing has completed watch can be called again. Without debouncing switches and buttons can result in multiple interrupts. An option to persistently watch is however a good idea. I'll add one over the next few days.

[Mrono]

what about having a setting to set the debounce timeout for the persistant watch?

edit: oops

[fivdi]

Another good idea. An optional persistent watch and optional debounce timeout will be available soon.

[fivdi]

V0.1.2 of onoff supports persistent watch and debounce timeouts. An example of their usage can be seen here