Michael, No, I hadn't. I searched for "subscribe" and trolled various pages and hadn't come across that. Thanks. I'll take a closer look and consider how that fits in to my set up over the next few days.
Jimbo, sounds great. I found those libraries before, but couldn't tell (or know) where to look for the websocket and/or subscription file(s). I presume I'm looking in the ISY folder at /ISYlib-python. To subscribe, am I looking for IsyEvent.py, IsyEventData.py, the Bin folder has isy_showevents.py, other? I saw IsyDiscover.py which is part of the equation.
Wow. Thank you both.
Luis