Many thanks to Home Assistant, automating the several devices that run your house is easier than ever. But you continue to need to make a relationship in between these devices and your Property Assistant setup, which can be difficult if the maker didn’t have this use situation in mind. When [Simon] wished to automate his home heating process, he learned that most Home Assistant-enabled thermostats that he could locate did not guidance his two individual heating zones linked to a solitary boiler. The easiest solution turned out to be to design and style his possess.
The primary heating procedure consisted of two regulate bins that each individual experienced a 230 V mains link coming in and a “request heat” manage line heading to the boiler. [Simon] viewed as replacing these with a easy off-the-shelf ESP8266 relay board and a 12 V electricity provide, but figured this would search messy and acquire up very a bit of house. So he purchased a neat DIN-rail mounted enclosure as a substitute, and developed a tailor made PCB to in good shape within it.
The PCB retains a Wemos D1 Mini connected to two relays that switch the two heating circuits. The D1 runs ESPhome and wants just a few traces of configuration to link it to [Simon]’s house community. There is no individual electric power offer — the 230 V line is related instantly to a 12 V DC electric power module mounted on the PCB, so the new technique is plug-and-engage in compatible with the previous.
Comprehensive PCB structure documents are available on [Simon]’s site and GitHub web page. There are quite a few other strategies to make customized thermostats for your home, with an Arduino for illustration. If you’re intrigued in repairing your very own heating program, or want to improve it even additional, there is a full neighborhood out there to assist you.