Comment by wkjagt

I don’t understand why we have to put microcontrollers in everything. I think a toilet on a train is basically the same use case as a toilet on a plane and all the planes I’ve been on, all had an old fashioned sliding lock mechanism that works totally ok. I wonder if the train bathroom the poster describes has a timer to avoid people from occupying the bathroom for the complete duration of the journey, and that’s why a mechanical lock won’t work?