I think this belongs in quick2wire.helpers.  And it would be great to choose a better name than helpers before it's too late.

The parts package was added to hold the APIs for the electronic parts of our hardware.

What would be a good name for software components that are higher level / more generic / more application focused than that?  Sort of like "widget" is used for GUI components, but for things that provide application-focused abstractions and drive hardware parts.