I am trying to upgrade the heating system in my home.
It is a central system, with a relay at the entry of the home that can be put on/off to cut hot water coming to the radiators or open it.
The radiators have thermostatic TRVs that regulate water flow depending on the internal thermostat.
I would like to upgrade it to a smart system.
I have tried buying a EQ3 bluetooth TRV and using a ESP32 to control it (I have tried tasmota).
But there are issues with it, the valve is not always detected, after a firmware upgrade it seems that cannot accept commands (as it needs to be paired)ā¦ so I am looking for alternatives, economical and that can be integrated with HA as easily as possible.
My requirementes would be:
- It should work in an isolated LAN with no internet access.
- I should be able to integrate it in HA and control it from it, but I should also be able to change mode from the device (or a controller).
- It would be great if the system could operate independently, even if HA is down (based in MQTT messages or similar system).
- It should be multizone, each zone controlled by a controler thermostat (I plan to use esp32 with tasmota or espHome) that regulates operation of the valves when the temperature goes out of range.
Alternatively the valves can be autonomous but be able to get the temperature from a configurable device and not internal thermostat. - It should be as cheap as possible.
- The valves should consume low battery, the batteries should last a whole year at least (that is why I would avoid wifi valves).
I have read a lot. but did not find a clear solution.
There are many smart valves but most of them operate from a phone app and need to be connected to internet which I want to avoid.
Zigbee seems a good options, but systems based on it seem to implement it in a propietary way and devices from one brand seem to not integrate well with a hub of another brand.
Zigbee thermostats seem to be expensive, I would like to use an esp32 if possible, each for each room.
Any idea?
Have you implemented a similar system?