Stelpro releases the first Z-Wave Plus Line-Voltage thermostat: the STZW402+ Stelpro Ki Thermostat

I had the same issue, it refused to make any changes via alexa. I couldn’t even get the updated device handler from Stelpro (on another thread) working. I installed Josh Conley’s Stelpro STZW402+ from github, and that fixed my issues. I even created a “heat” group in Alexa with two thermostats, and now I can adjust the two thermostats at the same time.

I did notice that if you manually put the device in ECO mode, Alexa can’t adjust it. I didn’t figure that out until after changing drivers, but I don’t think that was the issue with it.

Thanks so much! This fixed my Alexa connection problem.

Now if only I could get her to recognize half degrees!

Anyone able to publish an updated device handler for the zigbee version. I’d love to let Alexa control this bad boy

Sorry, newbie here. I ordered 12 of these. Do you install to your ST hub by just using the “add a thing” and it should find them?

Just click “Add a thing” and the SmartThings hub will detect it

Just saw your note…Ask Alexa can control the StelPro units…I had these in a condo I just sold and included the specific commands for these devices right in the code.

Thanks, does it have to be in pairing mode? Can I do that remotely?

Clicking the “Add a thing” will put your SmartThings hub in pairing mode.
While the hub is in pairing mode, put your Stelpro Ki Z-Wave thermostat in pairing mode as well (“On” in menu #1) and confirm the selection.

After few seconds, you should see your thermostat on the SmartThings app.

Thanks. I got it all set. 9 more to go. I appreciate all the help.

Thanks for taking time creating this smart app that makes the stelpro more functional that the default control of the ST application. I tried creating smart app from your code but this is what I got:
No signature of method: script1490418496263286009026.metadata() is applicable for argument types: (script1490418496263286009026$_run_closure1) values: [script1490418496263286009026$_run_closure1@5fdab025] Possible solutions: getMetadata(), getState(), setState(java.lang.Object), metaClass(groovy.lang.Closure)

Am i doing something wrong?
Thanks a lot

Added this to my hydronic floor line voltage circulator system recently, promptly removed it the day after. Had some strange behaivor as it made a heat call every 10-15 seconds until the room was up to the set point. Took a lot longer to reach temperature and my on demand hot water heater was constantly firing. I expected the heating intervals to be much longer.

I’ve sent a message to Stelpro support for more info as this seems odd.

Has anybody else tried this with hydronic? Here is a screen shot:

Hi @Zoggied,

The Stelpro Z-Wave thermostat is NOT meant to be used for hydronic control.
It is designed to work with baseboard heaters and convectors only.
As you have discovered, the heat cycle in 15 seconds, therefore you cannot use it on hydronic systems.

Yeah, figured that out. If they would provide an adjustable heat call period this would work well for my use case.

Hello J-F,

Well, it would appear that I do have a problem after all. After upgrading to the latest version of the device handler, everything was working. The day after, I can no longer adjust the setpoint from the Smartthings app.
I can still adjust the setpoint from Google Home, Alexa and even ActionTiles. But not with it’s own app.

Hi Paul,

Despite having more info at SmartThings level, I managed to update the device handler and it seems to work for me.
Please give it a try.

Wow, that was fast :+1:

And yes, it works. I will check it more closely in the next few days and report back.

Thanks a lot my friend. Really top notch service.

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Hey J-F,

it would appear that on their last update, Smartthings changed something that affected your z-wave handler again.
It’s no big deal this time as everything still works perfectly, but the green circle in the bottom, middle tile only says “setpoint” in really small letters.
You can still see your setpoint in between the arrows though.

Hi Paul,

Thanks for the notification.
It appears that the valueTiles don’t longer support having text on multiple lines.

So I will simply remove the setpoint circle tile since the setpoint is already shown in the main tile.

Device Handler updated
-Setpoint circle tile removed since the information is already shown in the main tile

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Thanks J-F