Support for ZigBee thermostats?

Hardware
1

The Zigbee compatibility list shows that Sensor (e.g., temperature sensors) are supported. But does this mean thermostats are also supported, provided they are ZigBee-compatible?

I’m looking to buy either Sinope TH1123ZB or Stelpro STZB402+ thermostats, but being very new to this scene, i’m trying to understand if I’m painting myself into a corner with ZigBee. (I’m quite good at hacking things together, to an extent, but only if this is supported in the first place).

Or should I play it safe and stick to Z-Wave?

Any advice would be super welcome. Thanks!

2

Also interest for this.
do you know the stelpro smt402? or the smc402?
is it possible to make them work with home assistant ?

3

I exchanged a few email with Stelpro; the SMC/SMT402 have Zigbee support, and apparently Zigbee 2.0 support is coming “in a few weeks”. Also, they are supposed to work with SmartThings. I’m not sure if that means they will work with Home Assistant… very tempted to order at least one to try

4

I just received a few smt402 + 1 smc402 so will see.
But for now the only zigbee bridge i got is a philips hue.
i don’t know how to directly support zigbee in home assistant
so i plan to do a zigbee to mqtt bridge and then i hope it work (https://github.com/Koenkk/zigbee2mqtt)
Do you have a better idea ? can we get a better support ?

5

oh, great, I’d love to hear your experience! Have you had a chance to install the thermostats yet? I assume you have electric baseboards?

As far as Zigbee support in HA, I think you just need a USB dongle that supports zigbee. I have an Elelabs adapter on order https://elelabs.com/products/elelabs_usb_adapter.html, still waiting to receive it. According to https://www.home-assistant.io/components/zha/, it should be supported.

6

Hi,

yes i got electric baseboards
I just install them today :slight_smile:
i was more thinking of using mqtt with a zigbee2mqtt bridge because it seems that home assistant doesn’t handle well thermostat with zigbee.
If i correctly understood what i read, thermostat are support for z-wave and mqtt but not yet by zigbee.
because zigbee sensors are support i think you can do something but i think it can be simpler that way.

Thanks for your link, intersting adapter.

For now i’m waiting to receive the hardware to make my zigbee2mqtt hoping that everything will go well

7

Hi bobzer,

I was wondering if you got your smt402 thermostats working with Home Assistant.

I bought 2 of them, but I am only able to see the humidity.

8

Hi,

Actually I tried once i got really strange stuff nothing usable and after it wasn’t recognize anymore with the controller (i got a few smt402 and a smc402).
So i understood it will get much more complicated than expected.
My goal is too be able to control the smt402 and ideally the smc402 also but for now i’m just using ifttt to control the smc402.

Anyway, I didn’t give up, I bought another zigbee dongle to be able to work on this without breaking my current installation and also for now i will do it with only one thermostat to not break my whole installation.
Between that and the little to no free time i got, this project is going but not as fast as i wished.

Hope you’ll get better results than i do

9

I went with the Sinopé TH1124ZB. First with Samsung Smartthings Hub (could only offer data out, no control from HA).

Then I went deConz + Conbee 2. But deConz doesn’t do thermostats. Although, I could see the zigbee network and that my two Sinopé stats had joined, and saw all the zigbee clusters/channels/ whatever they’re called for writing and reading states and messages.

removed deConz and installed ZHA integration. This has full access to the entire map from Sinopé, but… I can’t find documentation for that map to know which is what.

out of the box, I’ve got sensors. But no control.

need to next check on how to send zigbee messages (not manually), and which messages to send.

1 Like
10

I will follow up with more as I discover.

one thing I did find and set: local thermostat look-out.

11

Just fyi, I have the Sinopé TH1124ZB and it works flawlessly with zigbee2mqtt.

1 Like
12

Fantangelo:

please explain further! Was it all “out-of-the-box”, or did you need to modify any code?

which packages or components were required?

13

Super simple. zigbee2mqtt has native support for Sinope.
Check it out at:

The TH1124ZB is basically the same unit with a higher amp capacity.
I already had zigbee2mqtt installed and running to control a bunch of Xiaomi sensors and Hue bulbs.

1 Like
14

Thanks!

I don’t know how I didn’t find that page before now!

15

The zigbee2mqtt approach looks good, but like many users all my Zigbee is currently setup with ZHA through the HUSBZB-1 stick. I’m not willing to go through the trouble of redoing my entire setup. An out of the box support of Zigbee thermostats through ZHA would still be super useful.

I’m looking at the Sinopé TH1300ZB for my heated floors. Looks amazing!

1 Like
16

I actually used to use ZHA with the HUSBZB-1 stick but kept having devices fall off the network.
zigbee2mqtt has been far more stable for me.

17

Thanks for the info @fantangelo, good to know that I have a stable option if I have to go that way. I’ve had no problems myself though. I also like that the HUSBZB-1 also handles my z-wave stuff.

I might just buy a cheap non-smart thermostat for now and wait to see if out-of-the-box ZHA support is added, or if something else comes out (z-wave maybe, which I would actually prefer) in the next year or so. There are some wifi options (Sinopé and others), but I hate having to go non-local… I’ve been sufficiently burnt by Logitech and Nest/Google these past couple years.

18

I just create a PR on Zigbee2Mqtt to add support for Stelpro Ki & Stelpro Maestro thermostats.

As soon it’s merged, you’ll be able to test it :slight_smile: