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)

(592 reviews)

Price
$18.99

Size
Quantity
(60000 available )

Total Price
Share
97 Ratings
58
14
9
8
8
Reviews
  • Meguin

    > 3 day

    Works for medium to large size appliances, but smaller devices that use 5V power (most USB style devices or small devices), do not register on the devices power monitor. It goes to 0.1W, so if your device uses 1W or less, its near impossible to get a positive this device is definitely using power answer from the power monitor data (for use in home automation). All that being said, the connectivity and setup was very solid.

  • Miguel S.

    > 3 day

    Excelente compra, la configuración con la app eWelink se debe realizar primero via bluetooth y luego si enlazar al wifi 2.4Ghz. A través de ésta app se puede visualizar el consumo real de electricidad del aparato conectado. Enchufes muy estables, espero tengan la durabilidad adecuada

  • Tamás Hunor Dóri

    > 3 day

    I used with Tasmota to connect to Home Assistant. It adds a lot of other capabilities. Good even for just monitoring the power.

  • Jay Mather

    > 3 day

    I have found the Sonoff plugs to have a better range and reliability of other plugs I have purchased. The company allows for easy hacking via circuit board pads and the use of the ESP8285 chip. Even without flashing your own code the setup is fast and it connects with Alexa without problems using the eWeLink app.

  • Dave

    > 3 day

    The internet at my house is unreliable. Days of outages in March 2023. So counting on cloud based tools is a non-starter. These plugs are easy to open up, reflash with Tasmota software, and control through a website hosted on each plug, or via an MQTT server. Im happy with the plug hardware being easy to update, and happy with the new software.

  • JH

    > 3 day

    I own both the Wifi and Zigbee versions of this plug and am extremely pleased with both. After pullinn it apart (which is easy, no ultrasonic welds) the internal construction is very well designed and plenty safe enough to my reasonably educated eyes. The Wifi versions are straightforward to flash with your own firmware like Esphome or Tasmota without much trouble to run with your own system, and the Zigbee version integrates flawlessly too. I also like the form factor, with it leaving the other outlet available. Power measurements on the Wifi version are accurate when compared to my fancy measurement gear. And on top of all of that, the price is outrageously good? Yes, please.

  • Angry Black Man

    > 3 day

    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.

  • T. Stark

    Greater than one week

    We live in an older home that doesnt have overhead lighting in the ceiling. In stead, every room has to be lit with lamps and it was such a pain to turn everything on an off when you entered a room. So, we decided smart plugs and they have been a game changer. Very easy to set up with the eWeLink app and then integrate with the Alexa app. We group the switches together in each room and then set up the on/off schedules and routines in the Alexa app, rather than eWeLink, but you can do it either way. Lots of options. So much easier to just say Alexa, turn on the living room than switching on three lamps! Love these.

  • Dave

    > 3 day

    I like my smart devices not relying on external servers. So if the device is WiFi then I make sure I can flash it with tasmota. These are easy to disassemble and the flashing is not too difficult. Unfortunately the tax, RD, find, and vc are not pass through and are only pads but it is not too difficult to solder pigtails for flashing. I would prefer if the plug receptacle was on the side instead of the front.

  • J. Whiteside

    > 3 day

    Like many other reviewers, I have purchased this particular switch to install Tasmota on. I use them for energy monitoring, and in some cases their original intent - outlet switching, in my home. I buy whatever pack is cheapest per unit at the time, be it 1, 2 or 4 pack versions. Theyre all the same in my experience. To get them installed with Tasmota, I first tried to solder leads to them. Then I tried to solder pin headers and that was a little bit easier. Im slightly beyond entry level skill with soldering, but I destroyed at least three units in this learning process. I finally graduated to micro-grabber electrical test clips and have ripped through over two dozen conversions now without incident. Lets be frank. Id rather Sonoff just offered Tasmota OS from the get-go, or made these over-the-air flashable. I will settle for nothing less than local control and Im definitely not itching for a new and different cloud solution or app. Id prefer not to hack these devices in the first place and if Sonoff works towards preventing this from a hardware or software standpoint, I will buy no more of them. At the time of this writing (March 2022), this is probably one of the cheapest way to get local energy monitoring and basic 15 amp capable on/off outlet switching. I use Home Assistant for my home automation platform. These are fully compatible with their new energy monitoring dashboard. This provides me with significant insight into my homes energy use, especially now that theyre widely distributed to the overwhelming majority of my outlets. I usually capture between 13-18 kilowatt hours per day, the bulk of my usage. To be clear, I use higher grade energy monitoring switches in mission critical applications (furnace, fridge, etc.), but these are great even for non-mission critical high amp usage scenarios up to 15 amps. Ive pushed some of mine well up to the limits and havent had any major problems or sparks fly. Out of a couple dozen, Ive had one actual device failure. Oddly enough, even with different firmware, different units operate differently on my WiFi. Some stay connected to Wifi 100% of the time, others intermittently connect throughout the day. I dont lose any granular Home Assistant data because of this, nor are they ever inaccessible and fail to turn on/off. I dont have a good answer as to why different units behave differently with the same software. Odd behavior, but it doesnt result in problems. I really cant complain anyway, Im using them well outside of the manufacturers intended use. Build quality is good enough but I wish there was a bit more consistency. Since the majority of buyers are intending to hack these, I really wish they wouldnt cinch down some of the poor-quality screws like they are Shee-Ra or the Hulk. Ive destroyed way more screws than Ive wanted, and thats with the perfect screw removal tool which Ive determined to be a 2.0mm flathead screwdriver. Again, I just wish I could buy a decent quality, super cheap, 15 amp capable smart switch product with the OS of my choice out of the gate. Ive used these to solve VERY REAL problems in my home. From triggering outlets based on other inputs to making serious dents in energy conservation, I believe the $200ish dollars Ive put into these Sonoff S31 units will eventually pay for themselves. Its fairly easy for me when Im paying almost $0.25 per kilowatt hour, others might not have as good of an ROI. If anything, Ive achieved some level of energy usage consciousness. Ive killed and/or automated quite a few parasitic energy draws I wasnt even aware of, and have easily increased my automation abilities at the same time. Its important to know that these utilize about 2 watts each, just to function. This might not seem like much, but with two+ dozen of them running 24 hours a day - were talking about a ~50 watt constant load just to monitor outlet energy. For me, Ive killed and automated much more than that, so Im in the black as it were. Its important, at least for me, to keep tabs on the cost and value of energy monitoring. Im hoping I can continue to use these to save at least $500 in energy in the next 5 years, and so far, that seems to be a reasonable goal based on how I use them. Lastly, I dont want to get too much into minutia, but you need a fairly robust WiFi network to support the internet of things over WiFi. Personally, I utilize multiple networks, including Lutron, Z-Wave, Zigbee and WiFi to get there. Put simply, I dont use these cheap and ubiquitous hacked WiFi devices to service mission critical applications in any way. If a failure would cost me a fair bit of money, I spend more than $10 to capture energy usage and (sometimes) provide switching capabilities. +4 stars for being a hackable and very useful device overall. You can debate about that last star, even I waver between 4 and 5 stars. They provide much value for not much dollar and a reasonable +/-2 year path to return on investment for many people that are trying to optimize energy consumption or provide local, automated switching controls.

Related products

Shop
( 1714 reviews )
Top Selling Products