1. Introdución
The SONOFF DUALR3 Lite is a dual-relay Wi-Fi smart switch module designed to transform traditional switches and motorized devices into smart ones. It supports two-way control and is compatible with various smart home platforms, including Alexa and Google Assistant. This module is ideal for automating curtains, blinds, roller shutters, and other motorized facilities, offering both motor mode and switch mode functionalities.
The DUALR3 Lite has received TUV certifications, ensuring a safer and more reliable product for your home automation needs.

Figure 1: SONOFF DUALR3 Lite Smart Switch Modules
2. Información de seguridade
Please read and understand all safety instructions before installation and operation. Failure to follow these instructions may result in electric shock, fire, or other hazards.
- Installation should be performed by a qualified electrician or professional.
- Asegúrese de que a fonte de alimentación estea desconectada antes da instalación ou mantemento.
- Non expoña o dispositivo á humidade nin a temperaturas extremas.
- Operate the device within its specified electrical ratings (100-240V AC, 10A Max).
- Manter fóra do alcance dos nenos.
3. Product Features and Applications
The DUALR3 Lite offers versatile control for various motorized and electrical appliances:
- Control de relé dual: Independently control two devices or a single motorized device with two directions (e.g., open/close).
- Conectividade Wi-Fi: Connects to your home Wi-Fi network for remote control via the eWeLink app.
- Modo de motor: Specifically designed for 100-240V AC motors, enabling smart control of curtains, blinds, roller shutters, awnings, and more. Supports four-wire AC motors (GND, Neutral, Forward, Reverse).
- Modo de cambio: Can also function as a standard smart switch for lights and other appliances.
- Control de voz: Compatible con Amazon Alexa e Google Assistant para un funcionamento mans libres.
- Programación e escenas: Set timers, schedules, and create smart scenes for automated operation.
- Existing Switch Compatibility: Retains functionality with your existing wall switches.

Figure 2: DIY Automated Motorized Facilities with DUALR3 Lite
DUALR3 Lite vs. DUALR3 Comparison
The DUALR3 Lite is a streamlined version of the DUALR3. Key differences are outlined below:

Figure 3: Feature Comparison: DUALR3 vs. DUALR3 Lite
| Características | DUALR3 | DUALR3 Lite |
|---|---|---|
| Power metering (monitoring, real-time & historical power statistics) | ✓ | ✗ |
| Protección contra sobrecarga | ✓ | ✗ |
| Roller motor stroke calibration | ✓ | ✗ |
| Progress bar control with percentage (motor position display) | ✓ | ✗ |
| Modo medidor | ✓ | ✗ |
| Modo motor | ✓ | ✓ |
| External switch control in both Motor and Switch Mode | ✓ | ✓ |
| Modo de cambio | ✓ | ✓ |
Note: The roller motor requires the travel limit function.
4. Instalación e configuración
Before proceeding with installation, ensure the main power supply is turned off at the circuit breaker to prevent electric shock.
4.1 Cableado
The DUALR3 Lite module requires connection to live, neutral, and load wires. For motorized applications, it connects to the motor's forward and reverse control wires. Refer to the wiring diagram provided in the product packaging or the eWeLink app for detailed instructions specific to your application (e.g., curtain motor, light switch).
- Entrada: Connect Live (L) and Neutral (N) wires from your power supply.
- Saída: Connect Live Out 1 (L Out 1) and Live Out 2 (L Out 2) to your devices or motor.
- Interruptor externo: Connect your existing wall switch to S1 and S2 terminals for manual control.
Importante: Ensure all connections are secure and insulated. If you are unsure about electrical wiring, consult a qualified electrician.
4.2 Pairing with eWeLink App
- Descarga a aplicación eWeLink da App Store ou Google Play.
- Register and log in to your eWeLink account.
- Power on the DUALR3 Lite module. It will automatically enter pairing mode (indicated by a blinking LED). If not, press and hold the pairing button for 5 seconds.
- In the eWeLink app, tap the '+' icon to add a device.
- Siga as instrucións que aparecen na pantalla para conectar o dispositivo á súa rede Wi-Fi de 2.4 GHz.
- Once connected, you can name your device and assign it to a room.
4.3 Compatible Switch Types
The DUALR3 Lite is designed to work with various existing switch types, allowing you to retain manual control alongside app control.

Figure 4: Compatible Existing Switch Types
5. Instrucións de funcionamento
Once installed and paired, you can control your DUALR3 Lite using the eWeLink app, voice commands, or your existing wall switches.
5.1 Control de aplicacións
Open the eWeLink app to access your DUALR3 Lite. You can:
- Turn devices on/off.
- Control motorized devices (e.g., open/close curtains, adjust position).
- Establecer horarios e temporizadores.
- Create smart scenes to automate actions based on conditions (e.g., time, other device status).

Figura 5: Control remoto a través da aplicación eWeLink
5.2 Control por voz
Integrate your DUALR3 Lite with Amazon Alexa or Google Assistant for convenient voice control. Link your eWeLink account in the respective assistant app and use commands such as:
- "Alexa, open the living room curtain."
- "Ola Google, apaga a luz do dormitorio."

Figure 6: Voice Control Example
5.3 Programación
Set up schedules to automatically open or close your curtains, blinds, or other devices at specific times. This feature enhances comfort and energy efficiency.

Figure 7: Scheduling for Automated Comfort
6. Mantemento
To ensure optimal performance and longevity of your DUALR3 Lite module:
- Manteña o dispositivo limpo e libre de po. Use un pano seco e suave para limpar.
- Evite expoñer o módulo a auga ou outros líquidos.
- Regularly check the eWeLink app for firmware updates to ensure you have the latest features and security enhancements.
- Non intente desmontar nin reparar o dispositivo vostede mesmo. Póñase en contacto co servizo de atención ao cliente se xorden problemas.
7 Solución de problemas
If you encounter issues with your DUALR3 Lite, consider the following common solutions:
- Dispositivo sen conexión: Check your Wi-Fi connection. Ensure the module is within range of your 2.4GHz Wi-Fi router. Restart the module and your router.
- Non se pode emparellar: Ensure the device is in pairing mode (blinking LED). Verify your Wi-Fi password and network type (only 2.4GHz is supported). Try resetting the device by holding the pairing button for 5 seconds.
- O motor non responde: Check wiring connections to the motor. Ensure the module is in 'Motor Mode' in the eWeLink app settings. Verify the motor itself is functioning correctly.
- O control por voz non funciona: Ensure your eWeLink account is correctly linked to Alexa or Google Assistant. Check the device name in the eWeLink app and use clear voice commands.
- Control intermitente: This could be due to weak Wi-Fi signal. Consider relocating your router or adding a Wi-Fi extender.
For further assistance, refer to the eWeLink app's help section or contact SONOFF customer support.
8. Especificacións
| Especificación | Detalle |
|---|---|
| Número de modelo | DUALR3 Lite |
| Dimensións do produto | 1.3 x 2.68 x 4.02 polgadas; 4.8 onzas |
| Fabricante | SONOFF |
| Modo de operación | Interruptor intelixente |
| Valoración actual | 10 Amps |
| Vol. Operativotage | 120 Volts (Supports 100-240V AC) |
| Tipo de contacto | Sen contacto |
| Tipo de conector | Crimpado |
| Tipo de cambio | Rocker |
| Terminal | Parafuso |
| Material | Cobre |
| Estándar sen fíos | Wi-Fi IEEE 802.11 b / g / n 2.4 GHz |
9. Garantía e soporte
SONOFF products typically come with a limited warranty. Please refer to the warranty card included with your product or visit the official SONOFF websitio web para obter información detallada sobre os termos e condicións da garantía.
For technical support, troubleshooting, or any inquiries, please contact SONOFF customer service through their official website or the eWeLink app's support section.
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