I have been searching online and the forums but have not found a solution to this yet. I have an outdoor hot tub with 6 different pumps (all use the same return line) and I would like to measure the temperature of the return water with the ISY. Depending on the return temp and the outdoor temperature, I want to be able to adjust the temperature of the hot tub.
I know I can use PolyGlot and the different weather integrations to get the outdoor temperature, but I am not sure how to measure the return line temp. It looks like Insteon used to have a wireless thermostat with an external probe, but that is no longer for sale.
Any ideas on this?