Electric door lock

[shanky887614]

Why not put a microswitch in the catch well of each door manual lock. Wire each microswitch in parallel. Each door also has a maglock. If someone goes in and locks the door, the maglock on the other door also engages, all at the same time. That way you don't need to worry about light being on (if the toilet has natural light during the day) or people delaying between turning the light off and exiting.
Of course, where this falls down is if they then want to exit via the other door. Interesting problem tho...

Simple fix, feed 12/24v for maglock through a breakglass in the bathroom on the inside

 

[Cyberprog]

Well, the other thing that I considered was pressure pads by the doors, so when you stand by the door, it undoes the maglock. but that wouldn't work for a wetroom, and may be too big, plus then the door closes behind you and locks!
Breakglass outside would be a solution, though in my suggestion only one door would unlock.
It's an quirky problem, one we'll have when we re-wire this place as one of the rooms upstairs will have a shared en-suite.