[HELP Needed] Sonoff TRVZB

Configuration Zigbee
1

I have recently installed a number of Sonoff TRVZB in my home, they’re connected to HA using Zigbee2MQTT.

In the Overview dashboard I can see a number of Thermostat cards that show the details for each of the TRV, I can control the temperature fine and see the status change from Idle/Heating. However I can’t find where I can use the status, I’ve searched the list of entities and found nothing.

What I’d like to do is to control my boiler via an Automation, so that when the status of the TRV is Heating and the boiler is not running then switch on the boiler and likewise when the TRV returns to Idle and the Boiler is running it’s then switch off.

Can anyone assist me with this?

2

I use hvac_action:

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change from idle when not calling for heat

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… to heating when it is calling for heat.

Easy to experiment with two windows open, grab a thermostat in one window and watch the attributes change in developer tools states, search for the device you’re playing with…

3

Hi Ian, this you have shown me is very interesting, I believe is on the path I should take!

Finally you’ve shown where can I see the HVAC_ACTION, which is the one I’m interested in. I think what I’d like to do is an automation that switches on the boiler if any of the TRVs HVAC_ACTION goes from idle to heat, and the opposite too: if any of the TRVs HVAC_ACTION goes from heat to idle, then switch off the boiler.

My problem is I still don’t know how to create this automation.

I can see in the developer tools the STATE for the climate.living_room and all the other TRVs, but the STATE reported is the HVAC_MODE instead of HVAC_ACTION, which is the one I’m looking for. I mean when I look at that STATE it says either off, heat or auto. I need a STATE that says idle or heat.

Could you please explain in more detail this concept you’ve applied to your HA?

Do you need more information of my system? I’d say it’s pretty similar to yours,

Many thanks in advance,

4

@kromanyon I have a similar setup with multiple Sonoff TRVZB stats.

Create a template binary_sensor in configuration.yaml called ‘TRV Heat Demand’.

template:
  - binary_sensor:
    - name: "TRV Heat Demand"
      unique_id: trv_heat_demand
      state: >
        {% set climates = expand(
          'climate.trv_landing',
          'climate.trv_back_bedroom',
          'climate.trv_main_bedroom_1',
          'climate.trv_main_bedroom_2',
          'climate.trv_front_bedroom',
          'climate.trv_middle_bedroom'
        ) %}
        {{ climates | selectattr('attributes.hvac_action', 'eq', 'heating')
                      | list | count > 0 }}

‘TRV Heat Demand’ will be ‘On’ when any TRV is calling for heat, ‘Off’ otherwise. Use this sensor to control your boiler switch in an automation.

Hope this helps

1 Like
5

@NickSills thanks very much!! It took me days to understand it and implement it, but finally got it working! I really appreciate you took the time to help me out!

6

Amazing work thanks, I just used this and got it to work Life saver