It's why I live so much commercial stuff and things like bacnet.

Everything basically is just basic I/O with either analog or digital signal wires. Well documented. But it typically requires lots of actual wires running back to a controller.

I hate how consumer stuff is all different connections in so many different ways and they don't care if they deprecate a feature or something. What works today can be fucked up because they have unilateral control to change how their shit works in "updates."