Drayton Wiser Home Assistant Integration

DavidHT · November 25, 2025, 9:24pm

You can lock the Wiser TRV’s as well.

markgolledge · November 27, 2025, 4:48am

I’ve got the same problem.

Run HaOS from Proxmox and have the Wiser integration.

I must now be on the 4th or 5th time of the Wiser integration becoming unconnected. Everything is greyed out and I need to delete and then install the integration again.

Wiser app appears working fine.

euinor · November 28, 2025, 9:59am

Does anyone know if it is possible to simulate a Drayton Wiser device in a room with no smart TRV? In our bathroom the radiator is at the end of the bath and the water splash destroys the Drayton Wiser TRV. Currently it has a standard TRV on it, which is fine if I remember to boost another room to warm it. But I would like it to be kept at a standard temp.

I’ve put a Drayton Wiser Thermostat in the room and added it to the room in the app. Now I have a climate entity. But I’m wondering how to handle calls for heat, boosts and demand tracking.

Maybe I’m overthinking this and just treat it as a normal room.

johnBoy · November 29, 2025, 11:43pm

I’m trying to do something similar to that, for a different reason.

Try:-
A standard TRV fitted on the radiator set at the maximum temperature you would ever want the room to be at.
So perhaps 1 or 2 degrees higher than the temperature you would like it to be at.

Locate the the Wiser iTRV in the room where you would perhaps have put a Wiser Room Stat. (Just sat on a shelf in my case).

Then set a schedule using the iTRV.

(After some experimenting, I found the iTRV’s temperature measurement is really very good, when not fitted to a radiator. It’s just as good as a Room Stat, but a lot cheaper for some reason).

So the room is controlled to the set temperature by the schedule.
BUT. If there is also demand for heat elsewhere, the room temperature may rise higher, but will be limited by the standard TRV shutting off.
The actual values may need some experimentation, but it seems to work quite well.

johnBoy · November 29, 2025, 11:53pm

So,

As a step on from my previous post, would anyone know, when using multiple iTRV’s on radiators in a room, if one is allocated as the ‘master’ temperature for the controller? Or does that have to be a Room Stat?

euinor · November 30, 2025, 9:00am

Thanks for this! I’ll give it a go.

For the multi itrv situation. I have a room with more that one radiator and no roomstat and it works ok. There’s no indication of a ‘master itrv’ in the app, I’ve always assumed Wiser just averages the sensors together to get a room temp.

Duke_box · November 30, 2025, 10:33am

That’s my thought also, it just averages the readings across the iTRV’s.
I think Wiser support told me that years ago.

markgolledge · November 30, 2025, 3:32pm

Could I just follow on from this

if there is a room thermostat, does it take the temperature reading of the room thermostat?
if I’ve got 3 radiators in the same room, each with their own TRV, is it best to put these under the room in the app (the downside of this seems to be that you can’t see the temperature on each radiator…I have a feeling that one radiator might be overshooting the temperature).

Thanks

Duke_box · November 30, 2025, 6:48pm

If there is a roomstat associated to the room the iTRV’s are linked to then yes the roomstat overrides the iTRV’s
if your 3 iTRV’s are associated to the same room then, as said before they will provide an average reading back to the wiser hub, which without a roomstat, seems a good solution.

So because of the “averaging” this would smooth out your iTRV overshoot.

However, I have never thought to put individual iTRV’s, which occupy the same physical room into “virtual rooms”. It would be interesting to see what each iTRV is reporting.

dunxd · November 30, 2025, 6:54pm

If there is a room thermostat this takes precedent.

If two iTRVs then it makes a calculation based on both of them for that rooms temperature. I’m not 100% sure it this is the mean of the iTRV temps, but it feels likely. I haven’t tried with more than two.

The iTRV temps are availabe as attributes in this integration but not the Wiser app.

I made a post a few years ago with charts showing the different measurements for different combinations.

Im intrigued about using a spare iTRV as a standalone wiser thermometer. Over £100 per roomstat is madness.

Duke_box · November 30, 2025, 7:17pm

I didn’t know that. I have just searched the entities and their attributes for this and couldn’t find it.

Is this something that needs enabling in the integration like LTS stats or can you point me in the right direction.

Many thanks

johnBoy · November 30, 2025, 7:36pm

I can find the iTRV temperatures in HA when they are used individually, but not when used in a group using a Room Stat.
I can then only find the ‘Room Name’ LTS temperature.
(Not shown as Room Stat).

++ Edited to make a litle clearer. (I hope). ++

Duke_box · November 30, 2025, 7:39pm

I have 2 iTRV’s associated to a “room” in the App so because of that I think they appear in HA as one climate entity? Is this why I can’t see individual temps?
To be clear there is no roomstat in the “room”

Duke_box · November 30, 2025, 8:17pm

Yes that is what I see - the room LTS temperature - not individual iTRV’s readings.
Maybe the individual temperature is only reported if there is only 1 iTRV in a “room” without a roomstat.

Sorry - I now see that is what you said.

So it appears you can’t see individual iTRV temperatures UNLESS they are single climate entities.

Geoffw · November 30, 2025, 10:02pm

am sure there may be an easier way but if you down load the diagnostics (i think for any wiser device it is hidden in there. First you need work out the room Identity number from the section near the beginning which defines the room including the name and the smart valve(s) in it . Then go down to the smart valve (TRV) section where the temperature is listed for each valve ( at the time you download the diagnostic. -

msp1974 · November 30, 2025, 10:18pm

You can get it from the attributes on the trv signal sensor.

LGO44 · November 30, 2025, 10:28pm

The attribute is provided by the sensor.wiser_itrv…_signal
with the last firmware of the Hub and the last Wiser Home App
for example, I have a room with 2 Itrvs , Here are the attribute

Itrv 1
Temperature 17,8 °C
Window state false
External roomstat temperature 19,4
Room ID 3
Room Séjour

Itrv 2
Temperature 18 °C
Window state false
External roomstat temperature 19,4
Room ID 3
Room Séjour

The external roomstat temperature comes from the roomstat in this room, and is the measure for the climate.

I’m also developing the other attribute External Roomstat temperature , a PR will be proposed soon

Duke_box · December 1, 2025, 12:18am

Thanks Mark,
I can see it now

mattnewham · December 1, 2025, 10:12am

Yes all removed and factory reset. I’ve given up on the hub and just built my own automations in home assistant rather than using the hub. Couldn’t get them to pair to the hub at all!

johnBoy · December 1, 2025, 4:54pm

This is really frustrating/embarrassing for me.

When you say 'The attribute is provided by ‘sensor.wiser_itrv…_signal’.
Where do I put this?
Where do I see it?

I’ve looked at -dunxd- earlier post (427), but don’t understand where a template.yaml is.
Quote"

Here is some sample YAML for template.yaml:

- sensor                       
    - unique_id: 'kitchen_itrv_temp'
      name: 'Kitchen iTRV Temperature'
      unit_of_measurement: '°C'
      device_class: 'temperature'              
      state_class: 'measurement'
      state: "{{ state_attr('sensor.wiser_itrv_kitchen_signal', 'temperature') }}"

"

Where is this actually created?

Does it then create an entity, that can be displayed on a card?
I’d like to use it in an automation, if that has any bearing on it.
Sorry, I’m totally lost…