During the winter it takes a good 1/2 hr for my pool spa to heat up.
Now I can heat it up when I’m away from home so when I get there the spa is up to temp. and running.
I added a few wires to the Jandy valve controls and to the heater switch.
Blynk controls the relays to activate the valve and heater independently
If my computer reboots I have the blynk-ser.bat in my startup list.