Our tub is wood fired but I have a smart socket on the filter pump that is automated to run twice per day for 4 hours. I also have the Ecowitt Pool Temperature sensor so we know when it’s up to temp 👍

We have a Meross smart socket in a waterproof box with the hottub filter pump connected. This lets us automate the filtration of the tub.

The heating is old school… wood. :)

We also have an Ecowitt Pool Sensor which broadcasts the current water temp. Nice.

because it's open-source maybe.