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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 (1-Pack)

4.2 4.2 out of 5 stars 2,162 ratings

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S31 1-Pack
This item is certified to work with Alexa
WORKS WITH ALEXA
Add voice control by combining with an Alexa device
  • This item
  • +
  • Required
  • =
  • “Alexa, turn on living room lights.”

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Purchase options and add-ons

Switch Type
Touch
Material
Acrylonitrile Butadiene Styrene
Mounting Type
Plug In Mount
Specification Met
ETL

About this item

  • [Monitor Energy Consumption]:Keep track of real-time power, current and voltage of your appliances on App.and Measure your appliances’ power consumption for 100-day daily/monthly energy usage data and total electricity cost.
  • [Works with Alexa & Google Home,IFTTT Supporting]: Link "eWeLink Smart Home" skill. You can directly ask Amazon Echo/Echo Dot/Amazon Tap to turn on/off your SONOFF devices.Link "eWeLink Smart Home" on Google Home app, start to voice control your SONOFF devices on Google Home.
  • [Smart Remote Control Plug]: You can remotely/timely control ON/OFF any connected home appliance via APP eWeLink on your smart phone or tablet. No distance/time limitation.
  • [Set time schedules for the lights and home appliances]: You can set countdown/single/repeat timers to auto-turn on/off the WiFi controlled outlet on App. One tap ON/OFF Energy Saving.
  • [Share control of devices to others]: You can simply share control of your home appliances to others so that they can also turn on/off the devices remotely.
See more product details

Customer ratings by feature

Quality of material
4.1 4.1
WiFi signal
3.7 3.7
Remote Control
3.7 3.7
Value for money
3.7 3.7

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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 (1-Pack)
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 (1-Pack)
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Price$11.99-12% $37.99
List:$42.99
$17.98-52% $10.99
List:$22.99
-12% $21.99
List:$24.99
$12.99
Delivery
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Customer Ratings
Remote Control
3.7
3.7
4.1
3.8
3.7
4.1
Alexa integration
3.3
3.3
4.0
3.8
3.3
3.9
WiFi signal
3.7
3.7
4.0
4.2
3.7
Easy to use
3.4
3.4
3.9
3.4
4.0
Value for money
3.7
3.7
3.7
3.8
Sold By
SONOFF
SONOFF
Amazon.com
Amazon.com
SONOFF
Eightree Direct
material
Acrylonitrile Butadiene Styrene
Rubber
Polycarbonate
Acrylonitrile Butadiene Styrene
switch type
Touch
Touch
Push Button
connector type
Plug In
Plug In
Plug In
Plug In
Plug In
Plug In
control method
remote
remote
voice
voice
remote
remote
operation mode
Off
Off
ON-OFF-ON
Off
ON-OFF-ON
mounting type
Plug In Mount
Plug In Mount
Plug-In Mount
Plug-In Mount
Plug In Mount
Plug-In Mount

From the brand


Product Description

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs
SONOFF S31 WiFi Smart Plug Smart Outlet

SONOFF S31 WiFi Smart Plug with Energy Monitoring

1. Download “eWeLink” on App Store for iOS or on Google Play for Android.

2. Cut off the power before installing the device. Then power it on after completing the installation.

3. After powering on, the device will enter the quick pairing mode during the first use.

4. Click "+" on Home (topright) and follow the App prompts.

5. Input your WiFi SSID & password.

6. It will automatically search and connect the device. Name the device to complete.

SONOFF S31 Wi-Fi Smart Plug Outlet that Work with Alexa and Google Home

1. Tap "eWeLink Smart Home" on Alexa App, or "eWeLink Smart Home" on Google Home App.

2. Enter your eWeLink account and log in.

3. All the voice-controlled devices under your account display on Alexa App or Google Home App.

4. Name the devices to complete.

5. Now, control the connected devices with your voice.

“Alexa, turn on the light.”

“Hey Google, turn off the bedroom light.”

......

  • Only eWeLink advanced users have access to IFTTT, Costs 9.9USD and you will enjoy a full year of the privilege.
SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs
SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs

Alexa Energy Dashboard - Save on Energy Usage.

To make our homes more efficient and sustainable, Alexa officially releases the new energy dashboard that allows you to track, manage and save energy usage of SONOFF devices through Alexa app. SONOFF S31 support this new feature.

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs with App remote control

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs with Energy Monitoring

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs with Timing Schedule

APP Control

Want to remotely control those ordinary devices like heater, lamps and other devices? The smart plug is your ideal option. Plug and play, then you can turn ON/OFF them instantly just with a light touch on eWeLink App anytime and anywhere.

Energy Monitoring

Monitor the power, current and voltage. Tracking electricity useage in the last 100 days.

Timing Schedule

Create schedule to turn the plug on and off at specific time.

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs with LAN Control

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs with IFTTT Supporting

SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs with share device

LAN Control

When the router is not connected to the Wi-Fi network, you can still control the device through the App under the LAN Control mode. Note: Your phone and device must be connected to the same router.

Compatible with IFTTT

By connecting with "eWeLink Smart Home" on IFTTT App, you own unlimited possibilities to control SONOFF devices with IFTTT supported App and services. (Only eWeLink advanced users have access to IFTTT, Costs 9.9USD and you will enjoy a full year of the privilege.)

Share Devices

You can simply share home appliances to your family via App so that they can also turn on/off the devices remotely. Its easy control feature also make the elders or children enjoy smart life without difficulty.

SONOFF Smart Home

SONOFF WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs

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Product information

Technical Details

Additional Information

Warranty & Support

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Product Warranty: For warranty information about this product, please click here

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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 (1-Pack)


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Customer reviews

4.2 out of 5 stars
4.2 out of 5
2,162 global ratings

Customers say

Customers like the power monitoring and flash capabilities of the electronic switch. For example, they mention that it offers live electrical useage stats, and is very easy to flash with Tasmota. Customers are also satisfied with quality. However, some customers have reported connectivity issues and problems with the app. Customers also disagree on ease of setup, performance, and value.

AI-generated from the text of customer reviews

55 customers mention45 positive10 negative

Customers like the power monitoring of the electronic switch. They mention that the ability to monitor appliance energy consumption is a definite plus, and being able to schedule the ON/OFF is awesome. The real-time power monitoring is just awesome, and the energy reporting is quick and always available. Customers also appreciate the remote control and energy use monitoring, saying that it works on 2.4GHz wifi. Customers are also impressed with the options for inching and energy monitoring, stating that they are able read power consumption super fast and are easily flashed to Tasmota.

"...The energy monitoring is like a financial therapist for your appliances, revealing which ones are secretly guzzling electricity like thirsty hippos..." Read more

"...Remote control and energy use monitoring.note: this only works on 2.4ghz wifi, NOT 5ghz...." Read more

"...Compatible with Amazon Alexa, Google Assistant, and IFTTTPower monitoring featureCons:Too big it cover 2 gauge outlets..." Read more

"...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...." Read more

38 customers mention32 positive6 negative

Customers like the quality of the electronic switch. They say that the build quality is good enough, it keeps the consumption data, and is very reliable. Some customers also mention that the switch is one of the best iot brands on the market and has some genuinely awesome features.

"...The S40 actually has some genuinely awesome features...." Read more

"...Build quality is "good enough" but I wish there was a bit more consistency...." Read more

"Good quality fits with outlet you can put 2 together I mean not like round one block second outlet, work with eWeLink App and others but not working..." Read more

"...been no connectivity issues with this plug/adapter and it has been very reliable." Read more

24 customers mention24 positive0 negative

Customers like the flash. They say it's very easy to flash and it'll give you full local control. It's excellent for flashing with esphome and is easy to disassemble and flash with Tasmota. It is also easy to set up on 2.4g wireless with a great app with lots of features.

"I use these with HomeAssistant. They can be flashed with ESPHome firmware though you'll need to open them up and wire it up to USB to do so...." Read more

"...They are easy to open without damaging, and easy to flash with an FTDI adapter and test hooks...." Read more

"...However flashing it is very simple. Case snaps open and no soldering required. Plenty of videos on YouTube to show you how...." Read more

"...As an ESPHome device these plugs are great! Pretty easy to flash ESPHome on the device." Read more

98 customers mention67 positive31 negative

Customers are mixed about the performance of the electronic switch. Some mention that it works well, has no problems encountered, and is a very useful device. However, others say that it will not work at all if the outside internet connection is lost, and does not work with the Smart Life App.

"...Turns out, paws make excellent conductors for the touch-sensitive buttons. Cue the symphony of lights!..." Read more

"device was quite simple to get working, and does exactly what I needed. Remote control and energy use monitoring...." Read more

"...block second outlet, work with eWeLink App and others but not working with Smart Life App (some problems between this companies) and easy to setup..." Read more

"...+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...." Read more

73 customers mention46 positive27 negative

Customers are mixed about the ease of setup of the electronic switch. Some mention that it was easier than deciphering Ross's love life, integrates into Home Assistant easily, and the ewelink software was intuitive. However, others say that it's too complicated to set, has no easy instructions, and is difficult to troubleshoot.

"...Setup was easier than deciphering Ross's love life – just download the app, follow the instructions that even Chandler could understand, and boom,..." Read more

"...I couldn't get either of them to pair and the instructions were no help...." Read more

"...ewelink software was intuitive and easy to set up on android device. Also works well with google home." Read more

"Pros:FlashableAffordableEasy to useCompatible with Amazon Alexa, Google Assistant, and IFTTT..." Read more

49 customers mention21 positive28 negative

Customers are mixed about the value of the electronic switch. Some mention it is a good value and worth it for the extra electricity capacity and the app's UI, while others say that it was a waste of money and useless.

"This was a complete waste of time. I bought them because they are very popular and I just wanted cheap and simple energy monitoring...." Read more

"Pros:FlashableAffordableEasy to useCompatible with Amazon Alexa, Google Assistant, and IFTTT..." Read more

"Absolute garbage!" Read more

"...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..." Read more

57 customers mention4 positive53 negative

Customers have connectivity issues with the electronic switch. They mention that it wouldn't connect in normal mode, it would never get it to pair, and it intermittently connects throughout the day. Some customers also say that it uses only 2.4 and doesn't work on 5 WiFi. They also say it kept going offline and that the account frequently disconnects.

"...note: this only works on 2.4ghz wifi, NOT 5ghz...." Read more

"...Not as fast as some other smart plugsDoes not support 5GHz Wi-Fi..." Read more

"...Some stay connected to Wifi 100% of the time, others intermittently connect throughout the day...." Read more

"...Out of the 6 total units that I have now, 2 of them will not power on or pair (I am 7 days in the dark with their customer service with this so far)..." Read more

23 customers mention4 positive19 negative

Customers dislike the app for the electronic switch. They say it's not intuitive, it doesn't work, and is clunky. Some customers also complain that the app is underdeveloped and doesn' t work with their iPad.

"...The software sucks, they are a pain to configure, etc.But these worked really well...." Read more

"...Most only searches so older versions of the app and the app is not intuitive at all. It is very picky with how your wifi is set up...." Read more

"...The app is kinda cluttered with ads, but it provides a lot of stats on your energy usage. Connected seamlessly with Google Assistant...." Read more

"...Atomi and Meross don’t do this and the ads make the app feel unprofessional...." Read more

Own Over 25 Of Them, Tasmotized And Mostly Happy
4 Stars
Own Over 25 Of Them, Tasmotized And Mostly Happy
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. They're 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. I'm 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.Let's be frank. I'd 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 I'm definitely not itching for a "new and different cloud solution or app." I'd 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 home's energy use, especially now that they're 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. I've pushed some of mine well up to the limits and haven't had any major problems or sparks fly.Out of a couple dozen, I've 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 don't lose any granular Home Assistant data because of this, nor are they ever inaccessible and fail to turn on/off. I don't have a good answer as to why different units behave differently with the same software. Odd behavior, but it doesn't result in problems. I really can't complain anyway, I'm using them well outside of the manufacturer's 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 wouldn't cinch down some of the poor-quality screws like they are Shee-Ra or the Hulk. I've destroyed way more screws than I've wanted, and that's with the "perfect screw removal tool" which I've 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.I've 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 I've put into these Sonoff S31 units will eventually pay for themselves. It's fairly easy for me when I'm paying almost $0.25 per kilowatt hour, others might not have as good of an ROI. If anything, I've achieved "some level" of energy usage consciousness. I've killed and/or automated quite a few parasitic energy draws I wasn't even aware of, and have easily increased my automation abilities at the same time.It's 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 - we're talking about a ~50 watt constant load just to monitor outlet energy. For me, I've killed and automated much more than that, so I'm "in the black" as it were. It's important, at least for me, to keep tabs on the cost and value of energy monitoring. I'm 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 don't 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 don't 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.
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Top reviews from the United States

Reviewed in the United States on January 5, 2024
Size: S40 4-PackVerified Purchase
4 people found this helpful
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Reviewed in the United States on December 31, 2023
Size: S40 4-PackVerified Purchase
One person found this helpful
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Reviewed in the United States on June 5, 2023
Size: S31 4-PackVerified Purchase
22 people found this helpful
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Top reviews from other countries

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AJ
5.0 out of 5 stars Good smart plug for reasonable price
Reviewed in Canada on January 27, 2024
Size: S40 2-PackVerified Purchase
Émile Paradis
5.0 out of 5 stars Do yourself a favor and buy these ones
Reviewed in Canada on December 3, 2023
Size: S31 4-PackVerified Purchase
3 people found this helpful
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Excelente memoria solo que es muy lenta
5.0 out of 5 stars Excelente compra me encantaron
Reviewed in Mexico on November 16, 2023
Size: S31 4-PackVerified Purchase
One person found this helpful
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Jose Pablo Torres Teista
5.0 out of 5 stars Excelente producto
Reviewed in Mexico on September 14, 2023
Size: S40 1-PackVerified Purchase
Robert In Montreal
5.0 out of 5 stars Fast shipping, works great with Hubitat
Reviewed in Canada on March 3, 2023
Size: S31 1-PackVerified Purchase