Welcome to the forum.
I never looked into anything like this for pools and therefore have no idea if some system exists. I doubt it. But, all the parts to put something together do exist and probably relatively cheap. There are all kinds of specialized I/O devices for monitoring temperature, voltage, contact closures, relay control etc that are used in industrial automation. You would also probably have to write your own software. In my prior life I did this stuff in the aerospace industry. Was a lot of fun.
Al