Does anyone have any experience of an immersion heater that can be controlled from OH? I can make a dumb immersion heater smart with a smart plug but I’d like to be able to measure the temperature of the water inside the hot water tank too.
No to first question, but you could look a ds18s20 thermocouple with smart connection?
I just did a web search so I don’t have experience with this unit but it looks like it will work with an immersion heater with some wiring modifications