Thank you very much for your support. If you have found any other way, please tell me to test it. I have no problems at all in testing the various ways and in helping with the future functioning of the system. I look forward to more suggestions.
I was able to get the controllers to pair. but they don't indicate successful pairing now. No light is on. annoying to say the least. also, this build of recalbox runs PS1 games slower on the odroid c2 - by rights significantly more powerful than an rpi, worse than an rpi2.