Sorry for taking so long to get this posted, but I just have too many other projects to juggle, and this one was shelved for a bit. Anyway, here's a photo of one of my relay boxes.
This one contains 24 relays and has dimensions of 18" X 24" x 4". I have another just like it, plus a 12-relay box as well. Of the 60 relay branches, there are about 5 that are a mystery. They don't seem to affect any lighting circuits, nor do I find any outlets that are switched by them.
And this brings me to a question about upgrading my lighting system. Is the Hubitat Elevation able to send an ascii text message to a certain IP address, based on an event like tripping a motion detector? If yes, where should I start to learn how to do this?