S31 User Guide

Hi, welcome to use S31 US Smart Socket with Energy Monitoring!

1. Download “eWeLink” app.

Search “eWeLink” in APP Store for iOS version or Google play for Android version. If you are Android users, we suggest you update to eWeLink 3.1.6 and higher.

2. Add device

  1. Plug in and power up your S31 Socket.

2. Press the button for 7 seconds until the green LED blinks like this 

For Android users, please select the icon accordingly. Click next.

For iOS users, please select the corresponding according to the flashing led, click NEXT.

3. It will auto-search and connect smart home device around you.

4. Input your home WiFi SSID & password

4.1 If no password, keep it blank.

4.2 Now eWeLink only support 2.4G wifi communication protocol, 5G-WiFi-router is not supported.

5. Name the device to complete.

6. Maybe the device is “Offline” on eWeLink, for the device needs 1 minute to connect to your router and server. When the green LED on, the device is “Online”, if eWeLink shows still “Offline”, please close eWeLink and re-open.

3. APP features

1. WiFi remote control and device state

Turn on/off by tapping on device icon. Device state always simultaneous display on APP.

2. View real-time power, current and voltage

Enter the device control interface, users can view real-time power, current and voltage of the appliances S31 connect with.

3. Calculate energy consumption for a specified period

Tap Statistics, users can tap START to calculate the how much energy the connected appliance consumes. When they want to stop the measurement, they can tap END to view how much it consumes during the period.

4. View the daily and monthly energy consumption and total cost

Tap the icon the red arrow pointed to view maximum 100-day energy consumption. You can see daily and monthly energy consumption graph and cost. If you want to change the cost unit price, please go to device control interface, go to Device Setting to change it.

5. OPS (overload protection system)

Tap OPS, you’ll enter overload protection system to set select and set threshold value for real-time minimum power, real-time maximum power, current and voltage. Once your appliance reach the threshold value you’ve set and selected, your device will be auto-off to protect from overload.

6. Download the energy consumption history

Tap Download, your energy consumption history will be downloaded instantly to your phone.

7. Share Control


The owner can share the devices to other eWeLink accounts. While sharing devices, both should stay online on eWeLink. Because if the account you want to share is not online, he/she will not receive the invitation message.

How to make it possible? Firstly click Share, input the eWeLink account (phone number or email address) you want to share, tick the timer permissions (edit/delete/change/enable) you want to give, then click Next. The other account will receive an invitation message. Click Accept, the device has shared successfully. The other user will have access to control the device.

8. Timing


Support totally 8 enabled single/repeat/countdown timing tasks each device. Preset timers can work even network is unavailable, but the device must keep power on.

9. Set default power on status


In Device Setting, you can set default device status: ON or OFF when the device is power on.

10. Scene/Smart Scene

Scene allows triggering on/off your devices automatically. Note that only device owner can create scenes. Scenes can’t be shared. Scene Settings is in the upper right corner of Device List. You can set up scenes or smart scenes to trigger on/off the device.

Users should select “Click to execute” in the condition, add different existing devices, name the scene and save it.

11. Security mechanism

One device one owner. Other people can not add the devices that have already been added. If you want to add your device to another account, don’t forget to delete it first.

12. Update

It will auto-remind you of new firmware or version. Please update as soon as you can.

4. Problems and solutions

Read the detailed FAQ  on Itead Smart Home Forum. If below answers can’t solve your problem, please submit a feedback on eWeLink.

1. My device has added successfully but stays “Offline”.

Answers: The newly added device need 1-2 min to connect to your router and the Internet. If it stays offline for a long time, please judge the problem by the green led status:

1.1. Green led quickly blinks one time and repeats, which means device failed to connect to the router. The reason may be you have entered wrong WiFi password or your device is too far away from the router, which causes a weak WiFi signal. The device cannot be added to the 5G-wifi-router, only the 2.4G-wifi is OK. At last, make sure that your router is MAC-open.

1.2. Green led slowly blinks one time and repeats, which means the device has connected to router and server but failed to be added to the device list. Then power on the device again, if it still not working, just add the device again.

1.3. Green led quickly blinks twice and repeats, this means the device has connected to the router but failed to connect to the server. Then please confirm your WiFi router works normally.

2. Why the APP can’t find the device in pairing status?

Answers: That’s because of your phone’s cache. Please close the WLAN of your phone then open it after a minute. At the same time, please power off the device if you can, then power up to try again.

3. My WiFi is expired, can I connect the devices to LAN?

Answers: the S31 doesn’t support to be controlled by LAN.

4. The green led keeps off, even if the device is powered on. Press the button but the device does not work.

Answers: The circuit may be broken, please send it back for testing. Return shipping postage and packaging will be at buyer’s expense, if the device is damaged by the buyer, and the buyer should bear extra repair cost.