Product Overview
Introduction
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Product Name |
SONOFF DUALR3 Lite 2-Gang Smart Switch |
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Product Model |
DUALR3 Lite is a 2-channel smart switch that can be retrofitted into standard electrical wall boxes, behind light or curtain switches. It allows you to remotely turn the connected devices on or off, set schedules, and share control access with your family.
Highlights
- Motor Mode – Smarten Up Your Curtains & Shades
Transform your ordinary motorized curtains, blinds, or roller shades into fully smart, automated window coverings. App & voice control, precise percentage adjustment, and smart schedules let you open or close with ease—anytime, anywhere. Perfect for upgrading modern homes with effortless elegance and convenience.
- Switch Mode – Smart Dual-Channel Control in One Compact Device
Control two appliances independently—from lights and ceiling fans to coffee machines and heaters—using a single, space-saving module. Bring total flexibility to your smart home setup.
- Two-Way Wall Switch Compatibility – Smart Without Losing the Switch
DUALR3 Lite works with many external wall switches, including rocker, momentary, and SPDT. Enjoy the convenience of manual switch control without giving up smart features—great for retrofitting traditional setups.
- Rail-Ready Design – Easy to Install, Easy to Upgrade
Includes a removable DIN rail bracket for fast, secure mounting in smart distribution boards. Perfect for both DIYers and professional installers.
Applications
- Independent Control of Two Devices
Use one DUALR3 Lite to control two separate loads, such as two light circuits.
- Smart Curtain or Shutter Motor Control
Retrofit behind existing roller shutter or curtain switches to enable remote control, timer-based automation, or open/close percentage control (if supported).
- Scheduling and Automation Scenes
Set on/off timers for lights, fans, or motors. Create smart scenes to automate tasks, like turning off living room lights and closing curtains when watching a movie.
- etc...
Specification
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Model |
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Rating |
100-240V~,50/60Hz μ |
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Resistive Load |
2400W@240V-10A/Gang,3600W@240V~15A Total |
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Motor Load |
10-240W/1A |
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Wi-Fi |
IEEE802.11b/g/n 2.4GHz |
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Frequency Range |
2400-2483.5Mhz |
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Maximum RF output Power |
Wi-Fi:19dBm(e.i.r.p) BLE:4dBm(e.i.r.p) |
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Operating Systems |
Android & iOS |
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Number of Gangs |
2 Gangs |
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Working Temperature |
-10℃~40℃ |
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Material |
PC V0 |
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Dimension |
54×49x24mm |
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Disconnection Type |
Type 1 B |
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Pollution Degree |
2 |
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Rated Impulse Voltage |
2500V |
eWeLink Key Features
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Notice： After pairing, select the appropriate mode switch or motor in the eWeLink app based on the type of device connected. |
Switch Mode
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Device Home Page Functions |
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Key Features |
Feature Description |
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On / Off |
Channel 1 on/off state. Channel 2 on/off state. |
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Schedule |
Set the device to complete the specified action at the specified time. |
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Timer |
Set delayed actions for the device to execute after a specified time |
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Loop Timer |
The device executes a predefined action cyclically at specified time intervals. |
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Device Settings |
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Key Features |
Feature Description |
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Third-party Platforms |
Alexa |
You can control your smart devices through third-party services, including voice control. |
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Google Home |
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IFTTT |
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SmartThings |
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Alice |
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Assign location |
Set up the home and room where the device is located. |
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Share |
The device can be shared with other eweLink accounts. |
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Smart Scene |
Trigger Condition |
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Execution Action |
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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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eWeLink-Remote Sub-devices |
If you have also purchased the SONOFF R5, you can add it as a "sub-device" to the MINI-RBS. By using the "Scene Function" in the eWeLink app, the two devices can be linked, allowing the Sonoff R5 to function as a convenient wireless remote controller. |
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Working Mode |
Switch |
Use the device as a two-way switch.
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Motor |
Use the device as a motor.
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Push notifications |
After turning on "Push notifications", also make sure to grant notification permissions in Phone Settings > Permissions for the eWeLink app. This allows you to receive push notifications when the device status changes.
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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 switch state of the device when power is restored after a power outage.
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Inching Settings |
The device automatically turns off after being on for a specified duration.
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Delete Device |
Remove the device from the eWeLink platform. |
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Motor Mode
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Device Home Page Functions |
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Key Features |
Feature Description |
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Close / Stop / Open |
Adjust the current motor's operating status. |
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Percentage Adjustment |
Current position percentage adjustment. This function requires calibration before use. |
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Schedule |
Set the device to complete the specified action at the specified time. |
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Device Settings |
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Key Features |
Feature Description |
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Third-party Platforms |
Alexa |
You can control your smart devices through third-party services, including voice control. |
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Google Home |
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IFTTT |
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SmartThings |
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Alice |
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Assign location |
Set up the home and room where the device is located. |
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Share |
The device can be shared with other eweLink accounts. |
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Smart Scene |
Trigger Condition |
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Execution Action |
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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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eWeLink-Remote Sub-devices |
If you have also purchased the SONOFF R5, you can add it as a "sub-device" to the MINI-RBS. By using the "Scene Function" in the eWeLink app, the two devices can be linked, allowing the Sonoff R5 to function as a convenient wireless remote controller. |
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Working Mode |
Switch |
Use the device as a two-way switch.
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Motor |
Use the device as a motor.
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Push notifications |
After turning on "Push notifications", also make sure to grant notification permissions in Phone Settings > Permissions for the eWeLink app. This allows you to receive push notifications when the device status changes.
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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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Network Indicator |
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Delete Device |
Remove the device from the eWeLink platform. |
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Installation and Configuration Guide
① Button
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Button |
Description |
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Press & hold 5 seconds |
Device enters the pairing mode (Pairing time 10 minutes) |
② S1 LED indicator
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LED Indicator (Red) |
Description |
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Keeps on |
Channel 1 is on |
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Keeps off |
Channel 1 is off |
③ S2 LED indicator (Red)
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LED Indicator (Red) |
Description |
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Keeps on |
Channel 2 is on |
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Keeps off |
Channel 2 is off |
④ Wi-Fi LED indicator (Blue)
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Wi-Fi LED indicator (Blue) |
Description |
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Flashes two short + one long |
In Pairing Mode |
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Keeps on |
Online |
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Quick flash |
Compatible Pairing Mode |
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Flashes once |
Unable to discover the router |
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Flashes twice |
Connect to the router but fail to connect to the server |
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Flashes three times |
OTA |
⑤ Input/Output Terminal
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Terminals |
Description |
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S2 |
Switch_2 |
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S1 |
Switch_1 |
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N in |
Neutral (Input Terminal) |
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L in |
Live (Input Terminal) |
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L in |
Live (Input Terminal) |
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L Out 2 |
Live Output Terminal__2(100~240V) |
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L Out 1 |
Live Output Terminal__1(100~240V) |
Wiring Diagrams
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Notice：
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- Switch Mode
| To enable dual relay control, S1 and S2 are required to connect the push button switch in the pulse mode or the rocker light switch in the edge mode. |
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- Moto Mode
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Notice：
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Momentary switch. |
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Terminals |
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Wires |
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S2 |
Switch_2 |
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S1 |
Switch_1 |
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N in |
Neutral (Input Terminal) |
N |
Neutral Wire |
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L in |
Live (Input Terminal) |
L |
Live (100~240V) Wire |
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L in |
Live (Input Terminal) |
L |
Live (100~240V) Wire |
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L Out 2 |
Live Output Terminal__2(100~240V) |
L |
Live Wire; Switch_2 (Motor Reverse Line) |
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L Out 1 |
Live Output Terminal__1(100~240V) |
L |
Live Wire; Switch_1 (Motor Forward Line) |
Add Device
Open eWeLink, tap "+” and select "Add Device", then follow the prompt on the App.
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Notice：
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Install the DUALR3 Lite in the mounting box
FAQ
1. What types of loads are supported by the DUALR3 Lite?
DUALR3 Lite supports various types of electrical loads, including:
Lighting (incandescent, LED, etc.)
Motorized curtains/shutter motors (within rated capacity)
2. How many modes does it support, and what are the main application scenarios for each mode?
DUALR3 Lite supports three working modes:
- Switch Mode: Independently controls two separate loads.
- Motor Mode: Controls motor forward/reverse for curtain or shutter applications.
You can switch modes via the eWeLink app.
3. Does it support two-way/mechanical wall switches?
Yes, DUALR3 Lite supports external traditional wall switches, including SPST (single-pole single-throw) or two-way switches for local manual control.
4. What is the maximum length of the external switch cable?
It is recommended not to exceed 30 meters. If the cable is too long, it may be more susceptible to environmental interference, which could affect the device’s ability to turn on and off reliably.
5. My home uses a single live wire switch. Can it be connected to the DUALR3 Lite?
No, the DUALR3 Lite requires both a live wire and a neutral wire for proper operation. It cannot function with a single live wire setup.
Troubleshooting
1. Cannot pair with Wi-Fi
Make sure the device is in pairing mode.
Make sure your mobile device and DUALR3 are on the same 2.4GHz Wi-Fi.
2. DUALR3 Lite is paired but cannot be controlled remotely
Check if the device is powered on and the LED is steadily lit (indicating a successful connection).
Ensure your phone has internet access.
Try rebooting the router and the device or re-pairing it via the app.
3. DUALR3 Lite shows offline in the app
Ensure the device has not lost power.
Check Wi-Fi coverage and avoid placing the device too far from the router.
Try rebooting or resetting the device if the issue persists.
4. The wall switch does not respond
Check if the wiring to S1/S2 terminals is correct and securely connected.
Make sure the wiring length of the external switch connection does not exceed 30m.
If using a two-way switch setup, configure the wiring and logic accordingly.
5. In motor mode, percentage control is unavailable.
Please confirm whether the motor has been calibrated. If the device has not completed motor calibration, please go to Working Mode >> Motor >> Manual Calibration to complete the calibration process.