Comment by zanchey

The University Computer Club at UWA also has a door sensor!

https://door-status.ucc.asn.au/ucc

Runs off a Raspberry Pi with a bodged-up version of https://github.com/ide/pico-door-sensor/tree/main

This is at least the third iteration; some previous iterations are documented here:

https://www.ucc.asn.au/services/door.ucc