I spent many years working in building automation, that was a long time ago but it's still my main interest.
My control network has undergone a complete redesign in the last few months, mostly to simplify it because previous versions have been too complicated.
Some details here
although these pages are a bit out of data and have some conflicting information at present.
The immediate goal is to monitor various aspects of our motorhome such as the solar power system, truck body level, security cameras etc. I don't plan much control at present but things like water pumps are an obvious thing to play with.
Rob