Hi, just got a thought,
Why not integrate Bluetooth LE in the alarm system and send a notification if the mac adress isnt known before, should be possible to use with the pir sensors and cameras so they dont react on known peoples phones.
Have it been done before?
Beside that macs can be easily spoofed bluetooth is even well known for it’s bad security.
You will also really on people to have their bluetooth turned on while walking into your zone with coverage. I have not even wifi enabled out of the house (can also be used for tracking).
A project that might be interesting for you: