It would be nice to have some sort of mini-USB accessory that could bluetooth-enable an ErgodoxEZ keyboard.
I found some related discussion here: https://www.reddit.com/r/ergodox/comments/8kugs5/is_it_possible_to_add_bluetooth_functionality_to/, but that thread has been archived, and there's not yet a clear solution yet, so I'm moving the discussion here. The stackexchange format is better for such discussions anyway.
Best Answer
I tried out the bluetooth adapter mentioned at the end of the above reddit post (http://handheldsci.com/kb). The adapter somewhat works with an Ergodox, but is inconsistent.
It seems to work fine for any of the "regular" keys (keys on the first layer of the ergodox that are single-function). However, if you have a a key mapped to
ctrl+z,ctrl+s,cmd+z, etc., that key will sometimes work, but is flakey & inconsistent. Also, any keys on other-than the first layer are somewhat flakey in the same way.It does appear that that adapter would work fine with a "regular" keyboard, or anyone who is only using an Ergodox for ergonomics reasons (has a fairly-standard, single-layer configuration).
I hope that help anyone else thinking of trying that adapter out.