Where can I find a programmable bathroom fan?

Question

Do it yourself

Gentlemen, a slightly unusual question, but still - I wanted to make automatic ventilation in the bathroom, moreover, with full control over the process. I know there are models with timers, schedules, etc. But I would like it to be programmable, in order to set arbitrary conditions using a full-fledged PL, for example, "If the light was on for more than two minutes, then turn on the fan for 5 minutes" or "If today is the 8th Friday of a leap year and the footprints on the floor were with flat feet, then don't turn it on" (joke).
Accordingly, a wish - maybe someone will tell you models of fans, light or motion sensors, or just your thoughts and previous practices on similar ideas?

Answer 1

I have not seen programmable ventilators and they hardly exist. Here you can either study microcontrollers and fence your automation system, with relays, timers and sensors, this is the most flexible and budget option, especially if you want programming in PL. Or there are still programmable logic relays, but this option is more expensive and more suitable for power engineers not related to programming.

Answer 2

I was interested and interested in this issue, but in a different direction. Your question is solved by simply studying the Chinese Alibaba store (not advertising). I ordered a light sensor (unfortunately now I can’t attach a model and a link), to an external incandescent lamp - the essence of the work: it gets dark, the sensor works and the lamp lights up. I also bought several relays for blinds and gates, there are several programmable channels with duration of operation, etc.

Answer 3

On the samopal website I met a description of a ready-made solution with a diagram and a program.

Answer 4

I don't understand why it's so difficult.
A bathroom fan with a humidity sensor costs about 1,500 rubles in finished form.
With a normal, clean ventilation shaft, I rather want to cover the hole because it's cold. Or do you have a sealed bathroom door?