Wondering if anyone knows a project that works with US Thermostats (24V "C" supply wire, and AC/Forced heat/Fan connections). Preferably running something like ESPHome, or other FOSS? I believe I asked this several years ago, but I don't recall what was the answer, if any.
#Generic smart wired thermostat using only ESPHome/hass?
hot dawn
hot dawn
My (non-technical) Father wants to open his old home as a rental (4 people among 4 rooms). We want the residents to be comfortable, but not be able to run up the electric bill. Basically, set arbitrary minimums and maximums on the temperatures. I have a Mitsubishi Heat pump in my place, and was able to plug in an atom lite (ESP32 board) with a custom connector instead of my regular thermostat and I can control it via home assistant.
elfin wadi
i've done this before, esphome has a thermostat component and you can hook it up to a relay board
hot dawn
Nice idea, but there are no power outlets available near the thermostat terminals. Whatever I use would need to be able to run from the available 24 VAC and preferably be a self-contained unit.
Some renovations are likely going to be made in that general area, so perhaps a power supply could be added, but not likely worth the effort for that. Also, the home will be for mentally challenged individuals. I don't want opportunity for anybody monkeying with it.
hot dawn
i've done this before, esphome has a thermostat component and you can hook it up...
Thank you for the idea though.
elfin wadi
I think you can get a buck converter from 24vac to 5vdc
hot dawn
I think you can get a buck converter from 24vac to 5vdc
I didn't know those could do AC to DC?
Also, my Shelly One Plus relay can operate from 12V DC or 24V DC, and has an ESP32 inside. I know they make a 4 relay module, but without the switch input. If I could get that working, it would be great! I'll look into that option. Thanks a bunch!!!
hot dawn
Alas, the switch output would be the same as the power input. So there is a Shelly i4 DC that can handle 5-24 V DC, but whatever I use as input would also be sent as output for any closed switches. I could use a second relay board, but that seems kind of wasteful/overkill.