This is a good thread...
You can also replace regular outlets with usb enabled ones.. something like this for power:
https://www.amazon.com/Capability-Receptacle-Resistant-thanksgiving-Screwless/dp/B07D3L6ZM4/
Note: the above outlet is not necessarily recommended - I just did a quick amazon search.
I could be wrong but Ra2 is a whole system including a bridge to be used with the HE - so you would need more than just the sensor. Also it is expensive.. others have more experience with this however. I just have some Caseta stuff which does not have a motion sensor afaik.
edit: a motion sensor capable of integrating with HE. thanks for clarification @mik3!!!