This is yet another RPi thread.  Some of you might be interested.  I was originally intending to use 2 RPis for my HA, but on reflection I have decided that one of the two is hardly doing anything and it actually makes life simpler to collapse all of the functions down onto one RPi.  I had considered moving to a more powerful SBC (such as the one discussed in this companion thread)  but in the end I decided to stay with an RPi for now.  This will host a MQTT broker, a MYSQL (InnoD