adding more information/consistency around how to find device IDs

[jvaleski]

:recycle: Current situation

deviceID usage and definition is a bit scattered and confusing.

:bulb: Proposed solution

adding a little bit of clarity around where to obtain the deviceID during config/setup

:gear: Release Notes

just a couple of documentation changes.

Testing

Which tests were added? Which existing tests were adapted/changed? Which situations are covered, and what edge cases are missing?

Reviewer Nudging

Where should the reviewer start? what is a good entry point?

[donavanbecker]

@jvaleski Feel free to reopen this and point it to the new beta branch.