@rlkoshak, VERY COOL!! Thanks for the heads up, that Member Of group handler will do wonders for my rules, especially the metric crap-ton of JSON rules in my MQTT LED strip implementation ( NodeMCU MQTT LED Strip Controller Build & Config How-To Videos ). I could already improve that code tenfold with triggeringItem, but I’ll wait until 2.3 is officially out and then do it all in one shot.
BTW, the post you replied to is ~2.5 years old, back when I was just starting my adventure with OH 