The pipes are insulated and I didn't want to cut into that, but maybe a small hole for a sensor wouldn't be too bad. But as you say, timer works good enough an

The pipes are insulated and I didn't want to cut into that, but maybe a small hole for a sensor wouldn't be too bad. But as you say, timer works good enough and that means little motivation to continue to work on it -- countless other projects await :) BTW I've also tuned the timer to run for longer in the morning to get a hot shower ready. Edit: nice dashboard, what are you using for the chart? I like the vintage look.