Is Z-Uno supported by Smart Things? I need a water level sensor

I really like the form-factor of the Z-Uno device, and the fact that it is Z-Wave. I just really hope the price comes down to something much more reasonable. $70 is pretty steep for what you can do for about $10 using an inexpensive ESP8266 or ESP32 board, albeit via WiFi instead of Z-Wave. Of course, if you need Z-Wave, it looks like a nice option.

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I understand. I just haven’t heard of anyone using this with SmartThings yet, and I’m not sure it will be recognized appropriately.

From what I found on the Z-Wave.Me forum ( people have some positive experience with Z-Uno and SmartThings. But that was a EU version of Smart Things.

I’m not ready for programming complex communications via WiFi. ESP looks much more complex.

From the examples on Z-Uno site it seems to be very easy to make own devices. I’ve not seen such simple examples for ESP with schemes and guides. Z-Uno team made nice guides. At least I appreciate such nice examples.

I read that thread, but the only positive report was:

i can confirm simple dimmer to be working

I haven’t seen anyone report multiple sensors working yet with SmartThings. Or even one sensor, for that matter.

There are reports that everything is working quite well with Zipato.

Homeseer users are reporting the same kinds of problems that I would expect to see with a SmartThings implementation:

10Channel reference example does not fully work with HS Pro 3 build 313 with the latest Zvave stack. I enclosed a screenshot. I have opened a case to HS Support.

And quite a few people saying they can’t get a temperature sensor to work.

Unless I missed something, it’s a pretty active forum.

(The zwave frequency won’t make any difference as long as the frequency of the hub exactly matches the frequency of the end devices. )


No complicated programming necessary to use an Arduino or ESP device! I am the author of an Arduino library and set of SmartThings Device Handlers that simplifies the process for users down to editing a single Arduino sketch file. You simply decide what devices you want attached to each pin of your microcontroller and my software takes of of everything else!

Check it out!


depending on ST/ internet for a critical function like filling a tank, or stopping a pump, is bananas . If no harm will occur from missed commands then no big deal.

If the pump can be burned out by running empty, or the area will be flooded by pump running too long, then requiring ST/internet to operate correctly in order to avoid damage, is unsound design. It will make the hilarious issue of a garage door going down on your car, look like peanuts.

I expect incandescent disaster porn posts related to this design.


In fact best would be to use direct Z-Wave associations between Z-Uno and the switch. This is robust. And just report water level sensor to analyze in ST and use more complex logic in future

Why not simply use the microcontroller (Arduino, Z-Uno, ESP8266, etc…) to perform both functions? It could monitor level and control the pump accordingly, all without any wireless protocols or cloud solutions. This would be the most reliable and safest. You even even add in a water leak detector to make sure the pump doesn’t flood the area. Maybe even a temperature sensor to avoid running when temps drop below freezing? Lots of options… (can you tell I do industrial automation for a living? :smile: )

You could still expose everything to SmartThings for data tracking and manual control if desired. You could even “set the mode” of the arduino-device to either automatic control or manual.


They are not as close to each over to make it in one device. And I did not wanted wires to go along the tube from the tank to the wire.

BTW, adding a flood sensor to the same Z-Uno can be a nice idea to make sure the tank to not leak :wink: Will be two-in-one. And adding a DS18B20 temp sensor would also make sense to monitor temperature.

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I built a water level gauge for an overhead tank . Using the ST_Anyhting library and an ultrasonic sensor . The ultrasonic sensor measures the distance between itself and the surface of the water and is very precise . I will be adding a motor control option in the future . Unfortunately i haven’t had the time to clean up my code and share it. I will work on that but my project is a little bit more complex than what you are looking for.

I would recommend you use 2 ESP8266 .

ESP8266 - One

ESP8266 - Two

Once you have all theses devices exposed to Smartthings you can create a simple Smart app to manage the automation and notifications.

Forgot to report back - my Z-Uno was delivered and I managed to make it report values to SmartThings. Just had to apply a template from another sensor and edit a bit to have correct scales. So Z-Uno is pretty well supported in Smart Things. Hopefully SmartThings have a nice template manager for such custom devices

I’ve been trying to get my Z-uno to talk to ST using a simple button and could not get it to work. I’ve tried different device templates in ST , none worked.
Could you post your Arduino code and the device manager template?

That would be very appreciated

I would love to see how you got this all to integrate with Smartthings and if you do have the time, an explanation of how you did this, would be much appreciated.

Here is the main ST_Anything forum thread…

Thanks. I’ll purchase the hardware - maybe the lights will come on for me. Currently I have no idea how this will work.

What exactly are you trying to accomplish? That would help us advise you on your options.

I’m looking for a solution to fill a water tank by turning a water pump on when the water drops below a specified level.
Thanks for you response.

Sounds like @Saif76 does indeed have a solution that you could use without having to reinvent the water wheel! :wink:

I have ordered the sensor and ESP8266. (I have never used a device like this, so I suppose a big learning curve awaits me.
Is my understanding correct that once I have these devices set up with my wifi, I’ll be using your ST_Anything DTH. Am I correct that there is a child-device for the Ultrasonic Distance Measuring Transducer? I suppose once I have all this connect and talking to each other, I will be able to figure out how to calibrate the sensor. I’m concerned that I’ll not be able to read the water level in webCoRE.