[GTP]

> but a box full of relays and PLC controller cost a whole lot less than the all-in employer cost of an extra employee.

Why would you need an extra employee just to turn on/off the lights? I think janitors or teachers always did that as part of the job before smart switches came around, no need to hire some "light manager".

[Symbiote]

Exactly: the person who checks the windows are shut, taps are closed, and locks the doors every evening can also switch the lights off.

[yencabulator]

BRB starting a smart cloud faucets for schools startup.

(Any teachers that want to use a toilet after 5pm will need a smartphone app installed.)

[mmsimanga]

Having read most of the comments debating the pros and cons of the system this is an astonishingly simple solution! Sometimes I think those of us in technology look for problems to solve.