Hi Folks!
I have 2 Honeywell T10 Pro units, with remote sensors in each main room of the house - works great. It is hooked up to the app on my phone, as well as HomeKit - so it shows up under "Home".
I would like to build some automation - and JUST need to know if the thermostats are in an "OFF" state - I don't need to control them or anything, just that piece of information.
Has any work been done to somehow get this info - either from HomeKit, or via a web integration?
Thanks,
Matt
You could do it via virtual switches.
What I am struggling with is how to get the actual information from the T10 thermostat though.
Well you could set up HA and bring it into hubitat via HADB. That said you could also share out all your devices to Homekit and use Homekit as your dashboard...
It looks like homebridge has a driver to connect with the T10 - anyone here who has a need and is a good software developer and can fork this and get it working for hubitat?
In case anyone has this exact use case - there is a site called "Seam.co" that you can hook up to Residio, and I built a simple driver/app package for Hubitat that hooks up to Seam.Co specifically to get status from the thermostats as well as be able to control them. Hit me up if you want me to send the code over. It works with my simple setup.
FYI - these thermostats can be connected directly to Hubitat using the HomeKit Controller integration. No cloud integration needed.
HomeKit Controller is supported on the C-8 Pro and newer Hubitat models.
at least for my setup - even though my thermostats are set up on homekit - they often dropout, so its not reliable.
I actually just wrote a driver/app that directs hooks into the Resideo API - not going through seam, so one less hop.
I am going to put it out on HPM if anyone is interested to try it.
Hi Matthew,
Managed to connect with HomeKit but getting a "Bad Gateway" error when hitting "Allow" in the honeywell wensite. Any idea why and how to fix?
Actually - are you using my driver/app? It seems as if you are connecting via HomeKit - I did get that to work, once or twice, but it was very inconsistent - which is why I went direct.
there is another driver also which I heavily modified . search honeywell home on hubitat package manager
I tried multiples times on multiple days not working. I did see in my credentials some spaces were before my key which I thought I checked multiple times... It worked now. Better to use that than homekit?
Up to you! I just wasn't able to get homekit to work consistently.
Matt
That driver seems to be for Total Comfort which is the old API? My T10 works with the newer resideo. Trying to install however and I get an error code in HPM
Have you tried trying to get the emergency heat call to work? I would like to have that part in my home (I have a Steffes heat accumulator). I can try programming it, just seen not supported in your app to use "Heat" instead
Thanks!
No - I didn't program the emergency heat part in - I can take a look at it if you like.
Is everything else working? you can see the current temperature, set setpoints, etc?
Matt
I added support for emergency_heat - if you don't have the thermostat configured for that (like mine) - it will just error out (you can see it in the logs) and it won't change modes. If you could test to see if its working for you - that would be great. If it doesn't work - send me the log information, and anything you see happening or not happening so I can troubleshoot.
Upgrade via the standard HPM upgrade function.
it does not work 
Thanks for the quick update however 
2026-01-17 20:31:45.775
warn
Thermostat - Maison does not support emergency heat - this feature requires a heat pump system with auxiliary/backup heating
dev:292026-01-17 20:31:45.774
error
Failed to set emergency heat mode: Emergency heat not supported by this thermostat
I can confirm you I have a "Emergency Heat Mode" on my thermostat!! I understand maybe it does not work with the API
nope that's a different driver search as I said for honeywell home
Download the Hubitat app
