SONOFF S31 WiFi Smart Plug with Energy Monitoring, 15A Smart Outlet Socket ETL Certified, Work with Alexa & Google Home Assistant, IFTTT Supporting, 2.4 Ghz WiFi Only (2-Pack)

After opening them up and flashing Tasmota firmware to the onboard chip, I can now control these via MQTT and my home control system without an internet connection needed. A VPN connection handles off-site control. I am currently using them to schedule lamps and equipment chargers periods of activity.

These plug are a nice size and appearance. They come part well if you want to flash it. Flashing it is super easy with a decent jig. Be warned the breakout test pads lift easy if you try to solder directly to the pads. It was faster to print a jig then it was to fix it after the rx pad tore off.

I have one I use in conjuction with a motion detector to turn a light on when I enter my bedroom and it works flawlessly. As at the time I did not have a zigbee gateway, I bought the wiwfi version. I have no complaints at all.

Funcionaba muy bien y fácil de instalar

I bought a few Sonoff switches years back and needed more smart plugs. So as to limit my app-footprint, I ordered more Sonoff. Price is higher than other smart plugs but to keep my system with as few Chi-com manufacturers as reasonable i had to go this route. If you dont know there are 2 types. One offers live electrical useage stats and the other is basically a switch only, no data. They setup easy and work well. I never have them go off-line or die. I wish their price was about half what they are. Shipped fast.

The power adaptor is WiFi based, and I still havent connected to hassio yet. I tried to reset the device into local API mode, but still no luck yet. The android app is clunky and requires a cloud login. I run hassio cloudless. After much frustration with DIY mode, I tried flashing it with tasmota. Soldering the wires was a bit delicate - I suggest using headers instead. Then I learned that some FTDI and other serial tools have 5v power with 3.3v logic. After I finally got a fully 3.3v setup, the board appears dead. It just emits zeros. Even if it works, it then needs calibration. Sonoff ZigBee devices, in comparison are flawless and just work. I think Im done with Sonoff Wifi devices for now. I already have one power meter that I made from a raspi and an inductive current sensor. Power measurement isnt that hard. That cost a little more, but I wasnt fighting a black box, I was building with fully specd components. This might work flawlessly for some people. Maybe I just have a broken unit. Still, nowhere near as simple as their zigbee devices.

The S40 brings a new elegant and a little design to the previous one. It is amazing what you can do with the power consumption capabilities. And the best of all is the automatic turn off when there is an overload to protect the connected device. All of its smart options are as expected, they are even better when you have other Sonoff products. For example, I can turn on my wall plug when I turn on my light switch and more, just with the app. Overall, it is an incredible product and a must have in your smart house.

Was a little difficult to pair with Alexa, had to upgrade eWelink. So far happy with it.

This is a warning to anyone who wants to purchase this that they should consider the App Store reviews for the required app to run these. At the time of writing this, eWeLink-Smart Home has a 2.8 star rating plagued with bugs and all kinds of issues. This app is required to use this device and you need to have an account with them in order to link to your Google Home so when considering this product I highly suggest you consider the App rating. There is also a ton of privacy issues associated as it requires you send your location information, other data, home network access, and identifiers in order to create an account which is your email address. It is also not clear who I am sending this data to, or why it needs persistent location data. This is a Sonoff product that requires an eWeLink app which has the support email going to Shenzhen Cool House Technology Co., Ltd. When clicking on the Privacy Policy on the app store it doesnt actually go anywhere and just takes you to a home page that is in another language and when translated has no links to the Privacy Policy. Not a product I would want running inside my home network.

I have a dozen of these to monitor and control roof heaters remotely. Also use to automatically turn off space heaters.