What does mean "required" in reset()?

[MauroDiamantino]

Hi, what is the purpose of the parameter required in the method reset() of onewire.py? Does it state that checking the presence pulse after reset is important or nor?

[robert-hh]

Exactly what README.md tells: Resets the bus. If the parameter required is True, AssertError is raised if no device on the bus responds.

So calling reset(required=True) raises an error if no device is detected. Otherwise it silently ignores that state.