Shelly Plus UNI - ADC not working

Hardware
1

I have just purchased 3 Shelly Plus Uni devices, and as much as I hate these devices, the ADC on it will not work. I am also unable to update the firmware because as usual its a cloud dependent device and manual firmware downloads are not offered.

Right now, I have gone into the device web settings, added a peripheral for “Voltage Meter” and wired my sensor (0 - 5v output) to the Analog wire of my UNI.

If I measure with a meter between ground and the DATA of my sensor, I am getting 1.3v however in the UNI, it still just sits at 0.3v

Any ideas?

2

You need common ground between the sensor and Shelly as well.
Feel free to post your wiring.

Shellys are not cloud dependent devices, you can get everything from the local web server it creates and disconnect it from cloud.
https://shelly.guide/add-a-shelly-to-your-wi-fi-through-web-interface/

3
4

Be aware, Shelly Uni and Uni Plus have completely different wiring scheme for inputs and different max supply voltage.

1 Like
5

For future reference and if anyone else has the same issue. The “Voltmeter” must be enabled under the “Peripherals” section in the Shelly Mobile App:

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Click “Add Peripheral” and select Voltmeter.
Afterwards, the Voltmeter will be visible in the Perpirals section, as shown in the picture above. Click on the Gear Icon next to Voltmeter, which will take you to the settings page:

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The Voltmeter sensor only appeared in HomeAssistant after a refresh of the Uni Plus device within the Shelly Integration in HomeAssistant. (Click on the hamburger icon to the right of the device name and click on “Reload”)

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I use the Uni with a water pressure sensor and added this to configuration.yaml to create a water level sensor:

    sensors:
      water_tank_level:
        unique_id: "water_level"
        friendly_name: "Water Tank Level"
        value_template: "{% set voltage = states('sensor.water_tank_voltmeter') | float(0) %}{{ ((voltage - 0.0) / 0.051) | round(0) }}"

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1 Like
6

Thank you! This was the missing piece for me! Now I can monitor my gate battery status since the battery charges via solar.