Product Overview
Introduction
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Product Name |
SONOFF S31 WiFi Smart Plug |
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Product Model |
S31 Lite is a Wi-Fi smart plug supporting a maximum 15A load. With remote control via the app, you can set smart schedules and smart scenes to make life more convenient.
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Applicable Types of Load Sockets |
Applicable Types of Load Sockets |
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Highlights
- Mini & Thin
More Space Reserved. A small and compact body will not block adjacent outlets.
- Remote Control
Turn devices on/off anytime, anywhere with the app—say goodbye to wasted energy from forgotten appliances.
- Timer & Schedule
Set up custom schedules and countdown timers to automate your appliances based on your lifestyle.
- Smart Scene
Supports seamless collaboration with Sonoff sensors, switches, and other devices, delivering a fully integrated smart ecosystem experience.
Applications
- Rice Cooker/Electric Kettle: Remote control and scheduling—cook meals or boil water before leaving work, enjoy hot food/drinks as soon as you get home.
- Monitor/Desk Lamp: Automatic shut-off after work hours to reduce standby power consumption.
- Charger: Smart timers for phone/tablet chargers to prevent overcharging and extend battery life.
- etc...
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⚠️ Not recommended equipment:
These devices often draw a high inrush current at startup, which can exceed the plug's rated current and potentially cause damage.
EV charging typically demands higher power, often exceeding the plug's rated current capacity. |
Specification
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Model |
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MCU |
ESP8266 |
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Input |
120V~60Hz MAX 15A μ |
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Max Load |
1800W |
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Wireless connectivity |
IEEE 802.11b/g/n 2.4GHz Wi-Fi |
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Net weight |
90.72g |
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Dimension |
76x40x33mm |
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Color |
White |
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Casing material |
PC V0 |
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Applicable place |
Indoor |
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Working temperature |
0℃~30℃ |
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Working humidity |
5%~95% RH, No condensation |
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Certification |
UL / FCC / RoHS |
eWeLink Key Features
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Device Home Page Functions |
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Key Features |
Feature Description |
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Open/Close Device |
Control the on/off of the load. |
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Smart Timer |
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Device Settings |
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Key Features |
Feature Description |
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Assign location |
Set up the home and room where the device is located. |
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Share Device |
The device can be shared with other eweLink accounts. |
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Third-party Platforms (Add the device to the eWeLink app via the SONOFF gateway, then sync it to the corresponding third-party platform through account linking.)
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Alexa |
voice control(open/close) |
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Google Home |
voice control(open/close) |
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IFTTT |
voice control(open/close) |
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SmartThings |
voice control(open/close) |
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Alice |
voice control(open/close) |
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Salute |
voice control(open/close) |
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Group Control |
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Smart Scene |
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eWelink-Remote Control |
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Push Notifications |
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LAN Control |
A control method where the app communicates directly with the device over the same router, without going through the cloud platform.
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Offline Alert |
Turn on the "Offline Notifications" feature, and grant eWeLink notification permissions in Phone Settings > Permissions. You will receive a mobile push notification 5 minutes after the device goes offline.
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Logs |
Records of device status changes. (You can view the operation records of the past three months.) |
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Power-on State |
The device automatically turns off/turns on after being on for a specified duration. |
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Inching Settings |
The device automatically turns off/turns on after being on for a specified duration. |
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Installation and Configuration Guide
① Button
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Button |
Description |
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Press & hold 5 seconds |
Access to pairing mode |
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Press once |
Turn on / off |
②Network indicator (Blue)
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Network indicator (Blue) |
Description |
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Keeps on |
The device is online. |
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Two short and one long flashes |
The device is in pairing mode. |
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Quick flash |
The router is not connected. |
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Flash twice |
Connected to the router, but not connected to the cloud. |
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Flash three times |
Firmware upgrade in progress. |
③ Power LED indicator (Red)
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Power LED indicator (Red) |
Description |
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Light on |
The device is on. |
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Light off |
The device is off. |
Add Device
Download App
Please download the "eWeLink" App from Google Play Store or Apple App Store.
eWeLink App Pairing
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Enter“Scan QR code” |
Scan the QR code of the device |
Select“Add Device” |
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Plug in your device |
Long press the button for 5 seconds |
Check the indicator flashing status |
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Turn on the "Bluetooth" of your phone and connect the device |
Choose a "Wi-Fi" network and enter the password |
Wait until the pairing is completed |
FAQ
1. Are smart plugs compatible with all electrical appliances?
Smart plugs work with most appliances that have a mechanical on/off switch, such as lights, fans, coffee makers, and heaters.
2. Do smart plugs increase power consumption?
Smart plugs consume an extremely small amount of standby power (usually below 1W).
3. Does the device need to be in the same room as Amazon Echo/Google Assistant?
No. The device is bound to the voice assistant through cloud-to-cloud integration. As long as the two accounts are paired and the devices are online, they can be controlled by the voice assistants anywhere.
4. Can I plug a power strip into the smart plug?
It is not suggested to connect a power strip to a smart plug. In general, a plug has a smaller maximum load capacity than a power strip. Furthermore, overload devices (for the smart plug) can be easily attached to the power strip without awareness, increasing the risk of product damage.
Troubleshooting
1. After turning off my TV using a smart plug, why can't I turn it back on with the remote control?
Most TVs enter standby mode when turned off with the remote. However, the smart plug cuts off all power to the TV when it turns it off. Therefore, after powering off with the plug, you should first turn the plug back on before using the TV remote to switch it on.