Zwave-js thermostate climate entity issue when device exposes more than one temp sensor. (Heatit Z-TRM3)

Configuration Z-Wave
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1

Hi,

I converted from OpenHAB to Home Assistant a few days ago and so far I love it. However I seem to have one issue that I haven’t managed to work around yet (please excuse me if this is something obvious and easy as my HA experience is a bit limited):

In our house we have several Thermofloor Heatit Z-TRM3 zwave thermostats. These allow one to select whether to use floor, internal or external air temperature sensors. However, when they are discovered by zwave-js (used this as it was recommended in the docs), the generated climate entity seems to default to using the internal air sensor. Is there a way I can expose one of the other sensors to the “climate:” entity?

I am asking because for some of the rooms, the thermostat is mounted outside of the room, so the internal air sensor is virtually useless for the sake of thermostat control.

I am running on the following:

  • x86 machine with Aeotec Z-Stick Gen5
  • core-2021.4.6
  • supervisor-2021.04.1
  • zwave-js addon 0.1.20
  • zwave-js integration: driver 7.2.4, server: 1.50

z-trm3
z-trm3908×1696 74.8 KB

This screenshots illustrates the issue. The room itself is now 21.5 degrees, whilst the “climate” entity indicates 17.7 degrees

I found this hack, but from what I can tell it is not applicable to zwave-js: Unable to get current_temperature from HeatIt Z-wave thermostat - #26 by jan6en6tig

Any ways to fix this, hacky or elegant are most welcome!!

2

There is currently no integration agnostic way in HA to choose a sensor for a climate entity if there are multiple choices. I believe the zwave_js integration, just like ozw and zwave, will just choose the first sensor it sees. A workaround might be to create a climate template to wrap the existing one with an alternate sensor for temperature.

See also: Be able to choose temperature device on a climate device · Issue #226 · home-assistant/architecture · GitHub

1 Like
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I am considering buying this thermostat. Did you figure this out?

As far as I understand you can select which type of temperature sensor it uses (cabled floor sensor/the build in room sensor/cabled external room sensor). The temperature the unit reports would be from the sensor the unit uses. What’s your experience?

4

Sounds like something that could be fixed in zwavejs, I’d open a ticket.

5

This was addressed long ago. HA automatically chooses which temperature sensor to use for the climate entity based on the reported configuration.