Shelly Plus Uni | Smart Wi-Fi and Bluetooth Operated Module with Dry Contacts | Home Automation | Compatible with Alexa & Google Home | No Hub | Precise Voltmeter | Pulse Counting | Sensor Interface

Using two USB A power adapters and an e26 to 120 female plug adapter, I set this up to watch the power status of the garage door opener light to switch other outdoor lights on when activated.Wiring follows:Red/White: +5VDC from opener adapter.Black: -5VDC from opener adapter.Grey: +5VDC always on adapter.Green: -5VDC always on adapter.All others trimmed and taped off.The White analog wire connected to the Red wire allowed me to use the Voltmeter functionality to set up a trigger in Home Assistant when voltage was detected at the garage door light socket. I now have extra lighting when I come home in the dark and the other lights are also set to turn off and mirror the status of the garage.TP-Link, while their products are my go-to for price point and functionality, they don't report power status reliably.While this module has many features, the ones mentioned in this review made it extremely useful for getting a quick report in power status change, yielding useful light triggering. I didn't go through the trouble of adding a bleed resistor to the opener power adapter because I found a usb adapter that drained quickly after power off. There was some experimentation involved and I was lucky to have a generic usb adapter that met my needs. This functionality depends on how quickly any leftover charge is left in the adapter, so your results and implementation will vary from mine.

Easy to connect to via BT or WiFi.BT requires the Shelly app, WiFi only needs your browser.These are very low power/performance so they take a bit to get online, that is to be expected, it performs as promised.The Rpi Pico is $7 cheaper.The difference is the Rpi requires you o be interested in having an understanding of programming rather than the Uni needing the ability to work through some confined scripting.If the Uni offered a deal on buying a few together I would have done that, guess they like their single item profit level more than they care for increased sales.

These Unis work well for making old garage openers smart and be able to control 2 doors with such a small, prebuilt micro-controller. Small yet it is wifi enabled. The current wifi opener controller is not so great. This Uni is simple and I can make the sensors work as I prefer. I will be using 2 sensors on a single door to check door status, as well as latch status. I use it with a regulated 12V power adapter.I will be using another one for monitoring my car battery. I had situations where the battery became low several times. The Uni is perfect to wire up inside the car as a battery voltage monitor. Is sends me messages when its below the threshold.The Shelly App is easy to use and setup. I can also setup scenes and send notifications to my phone. The Uni has 2 wifi connections, so that I can setup home as well as one from my cell when away. Love the fact that it has 2 inputs and 2 potential-free outputs. The built-in voltage measurement via analog input is very accurate. The power consumption is low. Instructions are great and there is much info online as well. The Uni works as expected.

My 3rd review: I am using the Uni to remote control a Yaesu G-800DXA rotor for an HF antenna. I’m happy to report that it is functioning reliably now performing this task. The first thing to do is update the firmware. The SS relays on the Uni drive the CW and CCW rotor controls and LED indicators that I added (PU to 5V via 1k) without issue. The 0V to 4.5V directional indicator voltage from the rotor go to the analog input of the Uni which I set for the 0-15V range. You have to enable this input. It comes with a counter enabled which I did not use and disabled. I calibrated this to give 0 to 100% for that voltage range and used the equation x*4.5 to get degrees. Set the threshold to 1 for best accuracy. The app breaks the CW and CCW momentary controls into two PBs. These work okay but there is no way to disallow both on at once. There is no combinational logic available (unless you experiment with some JS). I made the degrees reading appear as a separate device. Unfortunately, useful documentation is sorely lacking and menus are not very intuitive so, if you’re not familiar with the app, you have to waste a lot of time trying to figure out what’s where in addition to what’s possible. Overall, it works and it works remotely via the Internet, it’s the only off the shelf solution that I had found that met all of the requirements for this, and it’s quite inexpensive compared with more industrial solutions.

I've been using UNIs throughout my van. I have 15 or so running. They aren't super durable, but printed 3d cases for them and am careful about the loads I control. The switches are low amp, so use a relay if you are controlling any real load. If you toggle power accidentally, they'll lose their connection to the wireless, but they are easy to add back with the shelly app. The devices work well with Home Assistant, and they are easy to wire up. They seem to handle a range of input power just fine (12v to 13.7v) though I did put eventually wire them with regulated 12v power just in case. The older ones use less power than the new Uni Plus. The new plus versions do seem more solidly built.

I’ve been looking for a WiFi voltage monitor and auto generator start for years. This Shelly provides the perfect solution to allow me to have my RV off grid but to monitor and charge my batteries from my home or anywhere else in the country.

The Shelly Plus Uni works exactly as described. The setup was straightforward. It has been rock solid using Home Assistant

I used 3 of these to handle the deployment, tracking and retraction of my 2.2Kw residential heliostat here in California. It's been a year now and the Shelly's haven't skipped a day