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

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(60000 available )

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97 Ratings
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Reviews
  • Sudip R.

    > 24 hour

    I want to confirm that this product (SONOFF S40 WiFi Smart Plug) works with 220v-240v, I asked this question here in this product page if it supports 240v but all answers I got were guess work saying that it might not work (I wonder why people answer if they dont know), guesstimate was not the answer I was looking for, when it is written 110v I too can understand it might not work. I bought this one (knowing the risk of it not working) to use in my home country Nepal where electricity is on average 230v. So, yes this one worked successfully in 230v, I hope my answer will help people like me who will be looking to know about this issue.

  • Joe E.

    > 24 hour

    I needed a method to measure electricity usage on my solar water heater backflush system. It has 1 small pump that moves the heated fluid from the rooftop solar panel to a heat exchanger tank, then another pump draws cold water from the bottom of water tank thru the heat exchanger and dumps the heated water into the top of my tank. The pumps run only when the temperature sensor on the roof senses the temp is warmer than the cold water in the bottom of my tank, so it happens sporadically as the weather changes. This device lets you put in the cost per kWh so it shows the actually cost of energy. Works perfectly for me. Also, these pumps only use about $5 of electricity per month.

  • Dona

    > 24 hour

    Easy to pair and get it working. Alexa, lights on, Alexa lights off! This plug is very handy! I am going to use it for my Christmas tree when its time! Looking forward to not having to struggle with the outlet each night.

  • Tamra

    > 24 hour

    Tried for days to pair and almost returned them. 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. The Name(ssid) and passwords Can Not have any spaces or special characters. This was a challenge because we are not able to change these without have to re setup all our other devices. Some are security cameras that are very difficult to get to (26 high and 1/4 mile from our router). Our router is only 2.4ghz but the app kept acting as though we were trying to connect to a 5ghz router. Ultimately we had to add a Guest Account named Letters only and set the password with the same restrictions (which makes for a very weak password). Once paired...whew, It seems to be working. The app does Not give the level of detail I was hoping for. It only provides total daily power usage or instantaneous usage. I wanted to see what time the refrigerator defrost heater came on, for how long and how much power it used but the app doesnt do this. With all this considered it is a good value and we may even buy more now that we are able to pair them. One star deducted due to the app, not the switch itself. Although, if the devices continues to work well over time without loosing connectivity or failing we will update to full 5 stars. We were able to determine the fridge pulls about 1amp/120watts while the compressor is running and a total usage of about 0.9kw over 24hrs. The hair drying on high heat and fan pulls over 13amps/1600watts which is almost the max rating of the device. Be careful not to overload. Only ran for a moment so cant speak to how long it can handle this level of current draw. Lastly the basic math calculation is not 100% accurate which should be very easy to accomplish. Volts x Amps = Watts. The device measures the amps and the volts and calculates the watts. They were reasonably close but not perfect. See image attached, should be 126 watts.

  • Kendall

    > 24 hour

    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.

  • Kate B.

    > 24 hour

    These are easy to use. As Im getting older, I love telling Alexa to do stuff and she does it. Obeys better than my kids did, lol.

  • Al

    > 24 hour

    I love these smart plugs, it’s very affordable and it really works. You can monitor all your appliances for power consumption and integrate in home automation with any kind of platform - alexa or google to name a few.

  • Jonathan

    > 24 hour

    Flashed Tasmota, and calibrated power use. They are working great, except I found out my deep freeze uses a lot more power than I thought it did.

  • Princess Lucky

    > 24 hour

    I really wanted a smartplug with good energy monitoring data. However, this device/app only gives you historical data in per day units and only in kilowatts. What about per second/min/hour? Or amps/milliamps/kiloamps? Or regular watts? As such, this only really is useful for recording your daily energy usage. As such, this is useless for someone like me, who is looking to observe changes in electrical consumption when I plug in/out any device in the house, or when I turn on/off a fan or anything else. The data also updates very slowly, taking a minute or two to read the energy consumption, and is incorrect. I have another energy monitoring smartplug that gives consistent rapid accurate data, and the SONOFF branded one is always off. This gets 1 star for being somewhat functional and an additional star for the price per value, but at 2/5 stars, I recommend you look at other options.

  • CarlosC2311

    > 24 hour

    I used them for a week with eWelink, and after two days they no longer reported power consumption quickly, or at all. I tried flashing them with ESPHome to test if they were bad and nope, they were perfect, and i was able to read power consumption super fast (down to 0.2s) and accurately every time. If you are considering buying them, go ahead, they are excellent if you flash them with Tasmota or ESPHome. Do not buy the S40/S40 Lite if you plan on flashing them (Very hard to open and uses the BL602 chip, that isnt supported by literally anything). And finally, remember the S31 Lite DOES NOT have power monitoring

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

eWeLink App Pairing InstructioneWeLink App Pairing Instruction

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. Tap “+” to operate following the prompt on the App.

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 plugsSONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs
SONOFF S31 WiFi Smart Plug Smart outlet Amazon Alexa Smart plugsSONOFF 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 controlSONOFF 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 MonitoringSONOFF 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 ScheduleSONOFF 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 ControlSONOFF 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 SupportingSONOFF 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 deviceSONOFF 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 plugsSONOFF WiFi Smart Plug Smart outlet Amazon Alexa Smart plugs

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