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Sonoff S31 Wi-Fi Smart Plug with Energy Monitoring,Home Smart Mini Socket Compatible with Alexa & Google Home Assistant,Smart Socket Outlet Timer Switch Remote Control Devices (2-Pack)

4.4 4.4 out of 5 stars 146 ratings
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Customer ratings by feature

Easy to use
4.7 4.7
Remote Control
4.3 4.3
Value for money
4.3 4.3
Alexa integration
3.6 3.6
See all reviews

Product Description

Convert any plug into a smart plug instantly for remote control anytime and anywhere

Want to remotely control those non-networked devices like air conditioning, TVs, refrigerator, Heater, lamps and more other home appliances? Sonoff socket is your ideal option. Just plug and play, then you can turn ON/OFF them instantly just with a slight touch on Ewelink app anytime and anywhere.


The smart Ewelink app is compatible with both Android and IOS smartphone or tablet.

Energy monitoring and save more money

S31 smart outlet can help you to keep track of real-time power, current and voltage of your home appliances on the App. You can also measure electricity consumption for a specified period. Besides, you can set threshold power, current and voltage value for your appliances.

Specifications:

  • Max. Current: 16A
  • Voltage Input: 90~264V AC, 50/60HZ
  • Wireless Standard: 2.4GHz, 802.11 b/g/n
  • Receive Sensitivity: 802.11b: <-84dBm(11Mbps); 802.11g: <-68dBm(54Mbps)
  • Output Power: 802.11b:16±2dBm; 802.11g:13±2dBm
  • Security Mechanism: WEP/WPA-PSK/WPA2-PSK
  • Encryption: AES/TKIP
  • Working Temp: -20 °C ~ 75 °C
  • Working Humidity: 10%-80%
  • Product Dimensions: 75.7x39.7x32mm

Set timing schedule

Sonoff smart switches enable you to set timing schedules for your home appliances or electrical devices. To do this, you just need to set the single/repeat/countdown timers on the Ewelink app, then you can schedule the connected light to turn on at 6:00 pm everyday, or schedule the fan to launch at a specified time so that the house can keep cool before you arrive home.

Advanced voice control

Sonoff smart switch can work perfectly with Alexa-enabled devices like Echo/Tap/Dot, as well as Google home. Just with a simply voice command, Alexa or Google Assistant will work for you, turning on/off the connected devices at once.
Control home appliances or electrical devices with your voice like this:
“Alexa, turn on the light.”
“Alexa, set bedroom light to warm white.”
“Hey Google, turn off the bedroom light.”
......

Compatible with Nest

When pairing with Google Nest, the Ewelink app can receive real-time environment data like temperature, humidity from Google Nest, as well as checking if there is anybody home or not. All these can be used to create smart scenes to control the connected devices. For example, use Nest compatibility to turn your lights off when the house is empty, or have a ceiling fan start automatically when you come back home.

Product information

Technical Details

Additional Information

Warranty & Support

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Sonoff S31 Wi-Fi Smart Plug with Energy Monitoring,Home Smart Mini Socket Compatible with Alexa & Google Home Assistant,Smart Socket Outlet Timer Switch Remote Control Devices (2-Pack)

Sonoff S31 Wi-Fi Smart Plug with Energy Monitoring,Home Smart Mini Socket Compatible with Alexa & Google Home Assistant,Smart Socket Outlet Timer Switch Remote Control Devices (2-Pack)

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
146 global ratings

Customers say

Customers like the control, power monitoring, and value of the light source. For example, they mention the timers work great, it's remote controllable from their phone, and it monitors energy usage daily. Some are satisfied with quality, and lighting. That said, opinions are mixed on connectivity, and ease of use.

AI-generated from the text of customer reviews

12 customers mention12 positive0 negative

Customers are satisfied with the control of the light source. They mention that the timers work great, the remote control works every time, and the relay is controllable. Some say that the product is completely local control and can be controlled with Home Assistant.

"...that Sonoff has added to their devices, these now support full local-only controll and integrate easily with HomeAssistant without any flashing..." Read more

"Have had my Sonoff now going on a month. Timers work great. Design works wonderfully now I can still use my other outlet, without any hassle...." Read more

"...They work great...." Read more

"These are great! They work as advertised: remotely controllable from your phone, providing power consumption data in a reasonable visual format...." Read more

12 customers mention12 positive0 negative

Customers like the power monitoring of the light source. They say it's great for monitoring power usage daily, and the app is easy to use. The app provides power consumption data in a reasonable visual format. Customers also mention that the power consumption monitoring works well and that it reports the power continuously.

"...several weeks now, and consistently respond instantly and report the power continuously & consistently...." Read more

"...This device does that fine. It also offers the ability to monitor energy usage daily (it gives you a total value used per day)...." Read more

"...The power monitoring is a nice feature, with a calculation of the cost based on the rate you enter in the app...." Read more

"...The power consumption monitoring works well and you can download the history into a .csv file if desired...." Read more

12 customers mention12 positive0 negative

Customers appreciate the value of the light source. They say it has the best smart feature for the price, and is one of the least expensive ways to control a wall outlet and monitor its power.

"...So these Sonoff S31 are an Awesome value, that has a solid stable integration with HomeAssistant (HassIO)!These are a great!" Read more

"...The power monitoring is a nice feature, with a calculation of the cost based on the rate you enter in the app...." Read more

"...smart plugs comes with compact size and stability as well as a competitive price...." Read more

"This is easy to setup and a good price. Some other reviewers said that it doesn’t remember power state after a power interruption...." Read more

11 customers mention9 positive2 negative

Customers like the quality of the light source. For example, they say it's a very nice product, with sturdy plastics that makes it strong and beautiful. Some say the plugs seem to be of average quality. That said, most find the design wonderful and useful.

"Have had my Sonoff now going on a month. Timers work great. Design works wonderfully now I can still use my other outlet, without any hassle...." Read more

"...The Sonoff S31 plugs seem to be average quality. My heater pulls ~1250 watts at ~11 amps and the Sonoff S31 does not get warm...." Read more

"...They when great and if I'll need to monitor anything else, these will be my go-to plugs" Read more

"Good unit. We have a bunch of these in service for about a year. Live the built in power monitor!" Read more

5 customers mention5 positive0 negative

Customers like the lighting of the product. They mention that it can be easily flashed with custom firmware and does not block.

"Got these plugs because they can be easily flashed with custom firmware (tasmota) and do not block second outlet...." Read more

"...happy with the product, the ability to open the product and the flashing process...." Read more

"Cheap and you can flash your own firmware if you don't want to use the provided one." Read more

"Awesome Value & Works GREAT with HomeAssistant (NO Flashing required)..." Read more

5 customers mention5 positive0 negative

Customers are satisfied with the stability of the light source. They mention that it is easy to use, rock solid, and has good hardware. Some appreciate the solid integration with HomeAssistant.

"...these Sonoff S31 are an Awesome value, that has a solid stable integration with HomeAssistant (HassIO)!These are a great!" Read more

"...Very nice, super sturdy plastics makes for strong and beautiful design. Lightweight enough so it does not unplug itself from the wall...." Read more

"...In particular, s31 smart plugs comes with compact size and stability as well as a competitive price...." Read more

"Just so easy to use and rock solid. Remote control works every time. Highly recommended." Read more

25 customers mention17 positive8 negative

Customers are mixed about the connectivity of the light source. Some mention it works well with Alexa, Google Home, and Home Assistant, while others say it has trouble connecting to Wi-Fi and other networks. Some say it only works on 2.4 GHz network.

"...Since then it has worked great and connected with Alexa easily after enabling the "eWelink" app." Read more

"...You don’t need to flash them they work awesome with the stock firmware but wanted to remove the cloud portion with local access using Home Assistant." Read more

"...current and voltage monitoring for US$16.00 with Alexa compatibility is a very good deal...." Read more

"...It turns out is support 240v. It works great the table lamp works on time as scheduled." Read more

19 customers mention13 positive6 negative

Customers are mixed about the ease of use. Some mention it's easy to use, setup, and integrate with HomeAssistant without any flashing. However, others say it'll prevent setup and require a mobile device to set up.

"...devices, these now support full local-only controll and integrate easily with HomeAssistant without any flashing necessary...." Read more

"...Lightweight enough so it does not unplug itself from the wall. Simplicity of use means even children can use these without much hassle." Read more

"These plugs are easy to use, plug them in, install the app, then connect to wifi...." Read more

"...This prevented setting the device up. Just FYI, check the app permissions if you're having issues connecting a device." Read more

Excellent design!
5 Stars
Excellent design!
Have had my Sonoff now going on a month. Timers work great. Design works wonderfully now I can still use my other outlet, without any hassle. I can turn on or off my lights while at home or away. Love and recommend this product to anyone. Make sure they work for your country's outlets. Very nice, super sturdy plastics makes for strong and beautiful design. Lightweight enough so it does not unplug itself from the wall. Simplicity of use means even children can use these without much hassle.
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Top reviews from the United States

raerae1616
5.0 out of 5 stars Awesome Value & Works GREAT with HomeAssistant (NO Flashing required)
Reviewed in the United States on September 8, 2020
Verified Purchase
Using the new API features, that Sonoff has added to their devices, these now support full local-only controll and integrate easily with HomeAssistant without any flashing necessary. They have been working great for me for several weeks now, and consistently respond instantly and report the power continuously & consistently. I've got one powering all the gear in my network closet including 3 UPS devices, 24 port PoE switch, cable modem, Edgerouter, Lutron Caseta hub, Sonoff Zigbee bridge, HDHomeRun, multiple Ubiquiti Access points (via PoE), Serial to Ethernet converter (for Pool Controller), and a Ryzen Unraid (NAS) server.... so that I can consistently see the power draw of all this...

And the Sonoff switch hasn't skipped a beat in over a month now. I already owned nearly a dozen TP-Link Kasa wifi switches, but the model with power monitoring is just over-priced. So these Sonoff S31 are an Awesome value, that has a solid stable integration with HomeAssistant (HassIO)!

These are a great!
6 people found this helpful
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Chris Chenhall
5.0 out of 5 stars Excellent design!
Reviewed in the United States on August 19, 2018
Verified Purchase
Have had my Sonoff now going on a month. Timers work great. Design works wonderfully now I can still use my other outlet, without any hassle. I can turn on or off my lights while at home or away. Love and recommend this product to anyone. Make sure they work for your country's outlets. Very nice, super sturdy plastics makes for strong and beautiful design. Lightweight enough so it does not unplug itself from the wall. Simplicity of use means even children can use these without much hassle.
Customer image
Chris Chenhall
5.0 out of 5 stars Excellent design!
Reviewed in the United States on August 19, 2018
Have had my Sonoff now going on a month. Timers work great. Design works wonderfully now I can still use my other outlet, without any hassle. I can turn on or off my lights while at home or away. Love and recommend this product to anyone. Make sure they work for your country's outlets. Very nice, super sturdy plastics makes for strong and beautiful design. Lightweight enough so it does not unplug itself from the wall. Simplicity of use means even children can use these without much hassle.
Images in this review
Customer image
Customer image
2 people found this helpful
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Tim
5.0 out of 5 stars Stock firmware setup is easy and fits my use case easily
Reviewed in the United States on September 29, 2020
Verified Purchase
I don't have a "connected" home yet, and I would like to put it off further. I did, however, require energy usage monitoring, specifically the ability to take a live sample of power draw. This device does that fine. It also offers the ability to monitor energy usage daily (it gives you a total value used per day). The app interface could be better, but it works fine.

Please note on iOS14 and up: I was having issues setting the second one up for a similar use case for someone else and they had denied access to the local network for the application. This prevented setting the device up. Just FYI, check the app permissions if you're having issues connecting a device.
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Amazon Customer
5.0 out of 5 stars This works with the ewelink app and the Alexa skill ...
Reviewed in the United States on February 3, 2018
Verified Purchase
This works with the ewelink app and the Alexa skill app together with no problems. On the ewelink app it well show you the Volt's. Amp's and Watt's. That let's me know if it is working. The Alexa skill does not show that. But both apps work side by side with out any issues. If you turn it on or off with earthier app it well show in both apps if it is on or off. As of today I am using 5 of them. In the ewelink app you can set on or off in a schedule. But if you tell Alexa to turn it on or off it well come back on or off in the next schedule of the ewelink app. I also use it to turn on my crock pot and roaster oven when I'm at work. And I use one to turn my ready heater on and off in the garage. You can also set up a repeat timer I use that on my night lights.
3 people found this helpful
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EF_IN_MD
4.0 out of 5 stars Great for monitoring power
Reviewed in the United States on June 14, 2019
Verified Purchase
I bought these so I could monitor power on things like our dehumidifier and freezer. They work great. It took a couple cycles of upgrading the software to get to the latest version, which provides the features I need (like having them always come in in the on mode after a power outage, which is essential for a freezer and dehumidifier). This was easy enough, though I am pretty tech savvy. The E-We-Link software that gives power information and lets you control the device is a little limited in functionality. For example, it shows a bar graph of the energy usage and doesn't provide the actual amount of energy used each day. Also, the instructions and some of the user interface elements are in 'chinglish'. I downgraded a bit for that. These can be flashed with open source software like Tasmoto. However, it required soldering and following some instructions on Youtube that are good, but require some skill. I did this on one of mine and the power monitoring ability was lost. I'm not sure if that is a software problem or if I did some damage with the soldering iron. Replacing the firmware allows use with open-source software like HomeAssistant. That's nice, IMHO, because the data is under your control and not in the cloud. Unfortunately, there is no going back to the native software once you do this.
One person found this helpful
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Brian R
5.0 out of 5 stars Easy to Use, Power Monitoring, Schedule with Sunset, Alarm
Reviewed in the United States on March 5, 2018
Verified PurchaseEarly Reviewer Rewards(What's this?)
These plugs are easy to use, plug them in, install the app, then connect to wifi. The power monitoring is a nice feature, with a calculation of the cost based on the rate you enter in the app. I use one for an old amp and the other for a lamp. I use the schedule to turn the lamp on around sunset, turn it off before bed, and turn it back on the next morning as an alarm.
One person found this helpful
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Lucius Hu
1.0 out of 5 stars Don't buy! The eWelink APP won't work in US
Reviewed in the United States on June 15, 2018
Verified Purchase
Don't buy it if you live in US and if you don't want to flash a 3rd party firmware.

For some reason, the eWelink app no longer supports login with US cellphone numbers. YES, you need a cellphone number to register and login.

*This makes it unusable if you live in US*

Below is my previous review.

===========

If you are not committed to trash your existing appliances and electronics while you still want a taste of smart home, smart plugs is the nicest choice.

In particular, s31 smart plugs comes with compact size and stability as well as a competitive price. The brand might not be as famous as those big names, but sonoff is actually the manufacturer for many of those famous, but expensive, brands. So I can trust its quality.
Customer image
Lucius Hu
1.0 out of 5 stars Don't buy! The eWelink APP won't work in US
Reviewed in the United States on June 15, 2018
Don't buy it if you live in US and if you don't want to flash a 3rd party firmware.

For some reason, the eWelink app no longer supports login with US cellphone numbers. YES, you need a cellphone number to register and login.

*This makes it unusable if you live in US*

Below is my previous review.

===========

If you are not committed to trash your existing appliances and electronics while you still want a taste of smart home, smart plugs is the nicest choice.

In particular, s31 smart plugs comes with compact size and stability as well as a competitive price. The brand might not be as famous as those big names, but sonoff is actually the manufacturer for many of those famous, but expensive, brands. So I can trust its quality.
Images in this review
Customer image
Customer image
One person found this helpful
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Neil B.
3.0 out of 5 stars firmware update required to remember power on state.
Reviewed in the United States on February 26, 2019
Verified Purchase
This is easy to setup and a good price. Some other reviewers said that it doesn’t remember power state after a power interruption. This is true for version 1.0.0 firmware. After upgrading to the latest firmware and exiting the settings screen, the next time you go into settings it will have a new option for power state. You can set it to “keep” or “on” which were not previously available. This is useful for devices that you want to always be on.
One person found this helpful
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