SONOFF Wi-Fi Smart Switch

User Manual

A Wi-Fi smart switch integrating APP remote control, voice control, timer and other functions. You can control your home appliances anytime, anywhere, and also create a variety of smart scenes to facilitate your life.

Voice Control

Smart Scene

Remote Control

Power-on State

Timer Schedule

Share Device

LAN Control

Group Control

① Button
Single press: Changing the on/off state of relay contacts
Long press for 5s: Enter pairing mode

② Wi-Fi LED indicator (Blue)
● Flashes two short and one long: Device is in pairing mode.
● Keeps on: Online
● Flashes once: Offline
● Flashes twice: LAN
● Flashes three times: OTA
● Keep flashing: Overheat protection

③ Wiring ports

④ Protective cover

Compatible Voice Assistants





100-240V ~ 50/60Hz Max 10A


100-240V ~ 50/60Hz Max 10A

Max. Load


Wireless Connectivity

Wi-Fi IEEE802.11b/g/n2.4GHz

Net Weight






Casing Material


Applicable Place


Working Temperature


Working Humidity

5%~95% RH, non-condensing



Executive standard

EN IEC 60669-2-1, UL 60730-1, CSA E 60730-1

Download the“eWeLink”App

Please download the “eWeLink” App from Google Play Store or Apple App Store.

1. Power off

*Please install and maintain the device by a professional electrician. To avoid electric shock hazard, do not operate any connection or contact the terminal connector while the device is powered on!

2. Wiring instruction

To ensure the safety of your electrical installation, it’s essential either a Miniature Circuit Breaker (MCB) or a Residual Current Operated Circuit Breaker (RCBO) with an electrical rating of 10A has been installed before the BASICR4.

Wiring: 16-18AWG SOL/STR copper conductor only, Tightening torque: 3.5 lb-in

*Make sure all wires are connected correctly.

3. Power on

After powering on, the device will enter the Pairing Mode defaulted during the first use, and the LED indicator flashes in a cycle of two short and one long.

*The device will exit the Pairing Mode if it is not paired within 10mins. If you want to enter this mode again, please long press the button for 5s until the LED indicator flashes in a cycle of two short and one long and then release.

Add a Device
1.Download the“eWeLink”App

Please download the “eWeLink” App from Google Play Store or Apple App Store.

2.Add device

Please follow the wiring instructions to connect the wires (ensure power is disconnected in advance and consult an electrician if needed)

Power on the device

Enter “Scan QR code”

Scan the BASICR4 QR code on the device body

Select“Add Device”

Long press the button for 5 seconds

Check Wi-Fi LED indicator flashing status

(Two short and one long flashes)

Search for the device and start connecting

Select the “Wi-Fi” network and
enter the password

Device“Added completely”

Device Function
1. Magic Switch Mode

After short-circuiting the L1 and L2 of the switch terminals through the wires, the device can still be online and can be controlled through the APP after the users flip the wall switch to turn off/on the light.

• Add a wire to connect L1 to L2 on the wall switch following the manual, and the device will stay online even when you switch it off via the wall switch after “Magic Switch Mode” enabled.

• The “Power-on State” will automatically be set to OFF, to make the “Magic Switch Mode” functional when enabled.

• The “Magic Switch Mode” will automatically disable after your adjustment to the “Power-on State”.

Note: Only compatible with mainstream brands of double pole rocker switches Rocker switches. The rear-end light needs to be compatible with mainstream brands of LED, energy-saving lamps, and incandescent lamps ranging from 3W to 100W.

*This function also applies to dual-control lamps

2.Auxiliary overheating protection

With the product built-in temperature sensor, real-time maximum temperature of the entire product can be detected and speculated, which prevents the product from deformation, melting, fire or live devices exposing in case of over-temperature.

The device automatically cuts off the load when it gets too hot. To exit the overheating protection mode, simply press the button on the device after confirming that the load is functioning normally without any internal shorts, excessive power, or leaks.

*Please note that this function only serves as auxiliary protection and cannot be used in place of a circuit breaker.