SirHumphreyAppleby:KrazyKid:I like the idea of IR sensors in each room.
PDL make IR sensors that fit in their 600 Series plates. Unfortunately, they are AC. A DC version that could be connected directly to I/O ports would be ideal for detecting and switch based on user presence (also a bit tidier than typical IR sensors for alarms).
davidcole:Video doesn't appear to be working.
https://youtu.be/e2gZomJB8b8