thread I only use a light switch for the downstairs bog when I'm ,
looking for tools*, utility room (looking in the freezer) or spare bedrooms. Everything else is controlled by my phone and a raspberry Pi. No server involved though, I built it all meself** including hand-knitted code.

*I have a Massive Toolbox in there, doesn't everyone.
**aside from the JSON code for the webserver***
***OK I didn't write apache, or raspbian etc etc