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@Colm89
Have had a *budget smart thermostat running flawlessly since January, which has noticeably reduced our heating oil consumption and kept temperature pretty consistent all year.
I decided for this winter I’d expand on this with some trv’s in the bedrooms and living room, so we’re not heating rooms unnecessarily or when windows were open, so I picked up an Aqara e1 trv and linked it to zha yesterday.
Initial findings; linked up to zha pretty hassle free, but only exposes a climate entity and no state change to indicate when it’s calling for heat, no big deal, set up an automation to check every 5 mins of actual temp is lower than target temp, and to switch the boiler on/off based on that. The bigger problem arises with the accuracy of the trv temperature sensor, which appears to only move in 1 degree intervals (which is probably fine for most), but to me feels like it’s not tight enough. I could of course use the more accurate xiaomi Bluetooth temperature sensors in every room to control them, but doing that means more devices and therefore batteries to monitor, and if I was going down that road it would probably be just as effective to use a minimum sensor value so the coldest room is always calling for heat, rather than fitting an expensive trv in every room.
Has anyone else gone down this rabbit hole?
*xiaomi Bluetooth temperature and humidity sensor with atc firmware reporting values to home assistant via an esp board with esphome, located in the babies room as that’s the most importantly room, and a Shelly 1pm controlling the boiler on/off switch - total cost ~€40