1. Introducció
The SONOFF DUALR3 Lite is a flush-mounted Wi-Fi smart dual relay switch module designed to transform any standard switch into a smart switch. It enables wireless remote control via mobile devices or voice commands, integrating your home appliances into a smart network. This module is ideal for controlling lights, home appliances, and motorized facilities such as roller shutters, window shades, blinds, and awnings.
The DUALR3 Lite supports two primary working modes: Canvi de mode i Mode motor. It allows for flexible control and automation of various devices.

Image: SONOFF DUALR3 Lite Dual Relay Module, highlighting app and voice control compatibility.
Característiques clau
- Control de relé dual: Independently control two connected appliances.
- Connectivitat Wi-Fi: Remote control via the eWeLink app from anywhere.
- Control de veu: Compatible amb Amazon Alexa i Google Home per a un funcionament amb mans lliures.
- Escenes intel·ligents: Create automated routines and scenes for personalized control.
- Programació i temporitzadors: Set schedules and countdown timers for automatic on/off actions.
- Mode de motor: Specifically designed for controlling 100-240V tubular motors used in motorized curtains, blinds, roller shutters, and awnings.
- Control bidireccional: Achieve two-way control for lights using existing physical switches.
- Matter Bridge Compatibility: Works with Apple Home via eWeLink CUBE Matter Bridge for broader smart home integration.
Video: Demonstration of DUALR3 pairing and basic operation via the eWeLink app.
2. Instruccions de seguretat importants
- Risc de descàrrega elèctrica: Aquest producte no és una joguina i no està pensat per ser utilitzat pels nens. Només per a ús d'adults.
- Instal·lació professional: Installation and maintenance should be performed by a qualified electrician. Do not wire when power is on to avoid electric shock.
- Temperatura ambient: La temperatura ambient màxima durant l'ús de l'aparell no ha de superar els 40 °C.
- Idoneïtat climàtica: L'aparell només és adequat per a climes moderats.
- Ventilació: Ensure proper ventilation. Do not impair ventilation by covering the appliance with items such as newspapers, tablecloths, or curtains.
- Open Flames: No col·loqueu fonts de flama nua, com ara espelmes, a l'aparell.
- Protecció de circuits: To ensure electrical safety, it is essential to install either a Miniature Circuit Breaker (MCB) or a Residual Current operated Circuit-breaker with Integral Overcurrent protection (RCBO) with an electrical rating of 15A before the DUALR3 Lite.
- Distància de separació: Under normal use conditions, this equipment should be kept at a separation distance of at least 20 cm between the antenna and the user's body.
3. Contingut del paquet
The package for your SONOFF DUALR3 Lite Dual Relay Module typically includes:
- SONOFF DUALR3 Lite Module
- Base de muntatge
- Manual d'usuari (aquest document)

Image: SONOFF DUALR3 Lite module and accessories in packaging.
4. Especificacions
| Atribut | Valor |
|---|---|
| Model | DUALR3 Lite |
| Font d'alimentació | 100-240V AC, 50/60Hz |
| Corrent màxim | 15A (total), 10A (1 gang) |
| Potència màxima | 3300W (total), 2200W (1 gang) |
| Dimensions del producte | 54 * 49 * 24 mm |
| Color | Blanc |
| Wi-Fi estàndard | IEEE 802.11 b / g / n a 2.4 GHz |
| Mecanisme de seguretat | WPA-PSK/WPA2-PSK |
| Humitat | 5%-95%RH, sense condensació |
| Material de tancament | ABS ignífug V0 |
| Temperatura de funcionament | -10 °C a 40 °C |
| Colla | 2 |
| Sistemes operatius | Android i iOS |
| Tipus de desconnexió | Tipus 1B |
| Grau de contaminació | 2 |
| Volum d’impuls nominaltage | 2500 V |

Imatge: Detallada view of the DUALR3 Lite module with specifications.
DUALR3 Lite vs. DUALR3 (Standard)
It is important to note the differences between the DUALR3 Lite and the standard DUALR3 module:
| Característica | DUALR3 | DUALR3 Lite |
|---|---|---|
| Power metering (real-time & historical) | ✓ | ✗ |
| Protecció de sobrecàrrega | ✓ | ✗ |
| Roller motor stroke calibration | ✓ | ✗ |
| Progressbar control (motor position display) | ✓ | ✗ |
| Mode mesurador | ✓ | ✗ |
| Mode motor | ✓ | ✓ |
| External switch control (Motor & Switch Mode) | ✓ | ✓ |
| Canvi de mode | ✓ | ✓ |
Note: The DUALR3 Lite does not support power metering or overload protection features found in the standard DUALR3.

Image: Feature comparison between DUALR3 and DUALR3 Lite.
5. Instal·lació
Before proceeding with installation, ensure the power is OFF at the main circuit breaker to prevent electric shock. All wiring should be performed by a qualified electrician.
5.1 Instruccions de cablejat
Important: Do not pull the wire directly from the live wire to the S1/S2 external switch. All connections to S1/S2 must originate from the DUALR3 Lite device itself.
Motor Mode Wiring (e.g., for Roller Shutters)
This mode is suitable for four-wire tubular motors. Connect the motor to the L Out 1 and L Out 2 terminals for forward and reverse operation. External momentary switches can be connected to S1 and S2 for manual control.

Image: AC Motor Wiring Demo for Motor Mode with momentary switches.
For dual relay momentary switch or 3-gang rocker switch configurations, refer to the detailed diagrams in the eWeLink app or the full PDF manual for specific wiring instructions.
Switch Mode Wiring (e.g., for Lights)
In Switch Mode, the DUALR3 Lite controls two output loads independently. You can connect existing physical switches (momentary, rocker, or ON/OFF) to S1 and S2 to retain manual control alongside app control.

Image: Compatible switch types for lights and roller shutters.
For double two-way control using SPDT switches, refer to the detailed diagrams in the eWeLink app or the full PDF manual.
Dry Contact Sensor Wiring (Follow Mode)
The DUALR3 Lite can also be used in Follow Mode with dry contact sensors. This allows the device to respond to signals from external sensors.

Image: Wiring for dry contact sensors in Follow Mode.
Ensure the neutral wire and live wire connections are correct. The device can still function if no physical light switch is connected to S1/S2. If S1/S2 are connected to physical switches, the corresponding working mode must be selected in the eWeLink APP.
5.2 Muntatge
The DUALR3 Lite is designed for flush-mounted installation, typically behind a standard wall switch or within a junction box. It also features a detachable mounting base for DIN-Rail installation.
- El pes del dispositiu és inferior a 1 kg.
- An installation height of less than 2 meters is recommended.

Image: In-wall and DIN-rail installation methods.
6. Configuració
6.1 Baixeu l'aplicació eWeLink
The SONOFF DUALR3 Lite is controlled via the eWeLink app. Download it from your device's app store:
- For Android: Search "eWeLink" on Google Play.
- For iOS: Search "eWeLink" on the App Store.

Image: eWeLink app download options.
6.2 Power On and Pairing Mode
After powering on the DUALR3 Lite for the first time, it will automatically enter Bluetooth pairing mode. The Wi-Fi LED indicator will flash in a cycle of two short flashes and one long flash.
- If the device is not paired within 3 minutes, it will exit Bluetooth pairing mode.
- To re-enter pairing mode, long-press the configuration button on the device for about 5 seconds until the Wi-Fi LED indicator flashes in the two short, one long cycle.
6.3 Add Device to eWeLink App
Assegureu-vos que el Bluetooth estigui habilitat al vostre telèfon intel·ligent.
- Obriu l'aplicació eWeLink.
- Tap the "+" icon and select "Add Device".
- Segueix les instruccions que apareixen a la pantalla de l'aplicació per completar el procés d'emparellament.
6.4 Compatible Pairing Mode (if Bluetooth pairing fails)
If Bluetooth pairing is unsuccessful, you can try the "Compatible Mode" for pairing:
- Long-press the pairing button for 5 seconds until the Wi-Fi LED indicator flashes in a cycle of two short flashes and one long flash.
- Long-press the pairing button again for 5 seconds until the Wi-Fi LED indicator flashes quickly. The device is now in Compatible Pairing Mode.
- In the eWeLink app, tap "+" and select "Add Device", then choose "Compatible Mode".
- For Android: Connect your phone to the Wi-Fi SSID starting with "ITEAD-******" (password: 12345678). Return to the eWeLink app and tap "Next".
- For iOS: In your phone's Wi-Fi settings, find and record the device ID from the "ITEAD-**********" SSID. In the eWeLink app, tap "+", select "Scan QR code", then "Add manually" and enter the recorded device ID.
- Tingueu paciència fins que es completi l'aparellament.
6.5 Wi-Fi LED Indicator Status
| Indicador LED d'estat | Descripció |
|---|---|
| Flaixos (un llarg i dos curts) | Mode de vinculació Bluetooth |
| Continua | El dispositiu s'ha connectat correctament |
| Parpelleja ràpidament | Mode d'aparellament compatible |
| Flashes quickly once (every 2s) | Unable to discover the router / Failed to connect to router |
| Flashes quickly twice (repeatedly) | Connecteu-vos a l'encaminador però no es pot connectar al servidor |
| Parpelleja ràpidament tres vegades | Actualització |
7. Operating the DUALR3 Lite
Once paired, you can control your DUALR3 Lite using the eWeLink app, voice commands, or connected physical switches.
7.1 modes de treball
After successful pairing, select the appropriate working mode in the eWeLink app based on your connected device:
- Mode de canvi: Controls two output loads independently. Ideal for lights and other on/off appliances.
- Mode de motor: Suitable for four-wire tubular motors, such as those used in curtains and roller blinds. This mode allows for precise control of motor movement.
- Meter Mode (Not available for DUALR3 Lite): This mode is exclusive to the standard DUALR3 and focuses on power metering without controlling the relay state.
7.2 Control d'aplicacions
The eWeLink app provides comprehensive control over your DUALR3 Lite:
- Encès/apagat remot: Turn connected devices on or off from anywhere.
- Programació: Set one-time or recurring schedules for automatic operation.
- Temporitzadors de compte enrere: Configure devices to turn off after a set duration.
- Escenes intel·ligents: Create custom automation rules based on conditions like time, device status, or other smart home triggers.
- Control compartit: Grant access to family members to control the device.

Image: Remote control of a window via the eWeLink app.
7.3 Control de veu
Integrate your DUALR3 Lite with popular voice assistants for convenient hands-free control:
- Amazon Alexa: Use commands like "Alexa, turn off the light."
- Google Home: Use commands like "Hey Google, close the curtain."
- Siri (via eWeLink CUBE Matter Bridge): For advanced users, Siri voice control is available as a shortcut in eWeLink. Note that DUALR3 Lite does not natively support HomeKit.

Image: Hands-free voice control with Alexa and Google Home.

Image: SONOFF devices integrating with Apple Home via Matter Bridge.
7.4 Automated Motorized Facilities
In Motor Mode, the DUALR3 Lite can automate various motorized facilities, enhancing comfort and convenience:
- Roller Blinds/Shutters: Schedule opening and closing times to align with your daily routine or sunlight.
- Cortines: Automatically open curtains to wake up with natural light or close them for privacy and atmosphere.
- Awnings: Control awnings remotely to protect against sun or rain.

Image: DIY automated motorized facilities examples.

Image: Scheduling curtains for comfort.
8. Manteniment
8.1 Switch Network
If you need to change the Wi-Fi network your DUALR3 Lite is connected to:
- Long-press the pairing button on the device for 5 seconds until the Wi-Fi LED indicator flashes in a cycle of two short flashes and one long flash.
- The device will then enter Bluetooth pairing mode, allowing you to pair it with the new network via the eWeLink app.
8.2 Restabliment de fàbrica
To restore your DUALR3 Lite to its factory settings, delete the device from the eWeLink app. This action will reset all configurations on the device.
9. Solució De Problemes
9.1 Fail to Pair Wi-Fi Devices with eWeLink App
- Mode de sincronització: Ensure the device is in pairing mode (Wi-Fi LED indicator flashes two short, one long). The device automatically exits pairing mode if not paired within 3 minutes.
- Serveis d'ubicació: Turn on location services on your mobile phone and grant permission to the eWeLink app. Location information is used to obtain Wi-Fi list details.
- Banda Wi-Fi: Make sure your Wi-Fi network operates on the 2.4GHz band.
- SSID & Password: Verify that you have entered the correct Wi-Fi SSID and password. Avoid special characters. Incorrect passwords are a common cause of pairing failure.
- Proximitat al router: During pairing, keep the device close to the router for optimal signal transmission.
- Mode compatible: If standard Bluetooth pairing fails, try pairing using the Compatible Mode (refer to Section 6.4).
9.2 Wi-Fi Devices "Offline" Issues
If the Wi-Fi LED indicator blinks once every 2 seconds, it means the device failed to connect to the router. Check the following:
- Incorrect SSID/Password: Double-check your Wi-Fi SSID and password. Ensure no special characters (e.g., Hebrew, Arabic) are used, as the system may not recognize them.
- Router Capacity: Your router might have a low carrying capacity. If the number of connected devices exceeds the maximum, remove some devices or upgrade your router.
- Intensitat del senyal: The Wi-Fi signal might be weak due to distance from the router or obstacles. Move the device closer or remove obstructions.
- Gestió MAC: Ensure the device's MAC address is not blacklisted in your router's MAC management settings.
If the Wi-Fi LED indicator flashes twice repeatedly, it means the device connected to the router but failed to connect to the server. Check the following:
- Connexió a Internet: Verify your internet connection is working normally (e.g., by browsing on your phone or PC).
- Router Capacity: As above, check if your router's capacity is exceeded.
- ISP Blocking: Contact your Internet Service Provider (ISP) to confirm that the eWeLink server addresses are not being blocked.
If these steps do not resolve the issue, submit your problem via the "Help & Feedback" section in the eWeLink App.
10. Consells d'usuari
- Version Clarity: Always confirm you are using the DUALR3 Lite model, as it has specific feature limitations compared to the standard DUALR3, particularly regarding power metering and overload protection.
- Mesura de potència: The DUALR3 Lite does NOT include power metering functionality. If this feature is essential for your application, consider the standard DUALR3 model.
11. Informació de compliment
11.1 Declaració de compliment de la FCC
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna, increase the separation between the equipment and receiver, connect the equipment into an outlet on a circuit different from that to which the receiver is connected, consult the dealer or an experienced radio/TV technician for help.
Declaració d'exposició a la radiació de la FCC: Aquest equip compleix els límits d'exposició a la radiació de la FCC establerts per a un entorn no controlat. Aquest equip s'ha d'instal·lar i operar amb una distància mínima de 20 cm entre el radiador i el cos. Aquest transmissor no s'ha de col·locar ni funcionar juntament amb cap altra antena o transmissor.
11.2 ISED Notice (Innovation, Science and Economic Development Canada)
Aquest dispositiu conté transmissors/receptors exempts de llicència que compleixen els RSS exempts de llicència d'Innovation, Science and Economic Development Canada. El funcionament està subjecte a les dues condicions següents: (1) Aquest dispositiu no pot causar interferències. (2) Aquest dispositiu ha d'acceptar qualsevol interferència, incloses les interferències que puguin provocar un funcionament no desitjat del dispositiu.
Aquest aparell digital de classe B compleix amb la norma canadenca ICES-003(B). Aquest dispositiu compleix amb RSS-247 de Industry Canada. El funcionament està subjecte a la condició que aquest dispositiu no provoqui interferències perjudicials.
Declaració d'exposició a la radiació ISED: Aquest equip compleix els límits d'exposició a la radiació ISED establerts per a un entorn no controlat. Aquest equip s'ha d'instal·lar i fer funcionar amb una distància mínima de 20 cm entre el radiador i el cos. Aquest transmissor no s'ha de col·locar ni funcionar juntament amb cap altra antena o transmissor.
11.3 Informació sobre l'eliminació i el reciclatge de RAEE
All products bearing the WEEE symbol (crossed-out wheeled bin) are waste electrical and electronic equipment (WEEE) and should not be mixed with unsorted household waste. Protect human health and the environment by handing over your waste equipment to a designated collection point for the recycling of WEEE, appointed by the government or local authorities. Correct disposal and recycling help prevent potential negative consequences to the environment and human health.
11.4 Declaració de conformitat de la UE
Hereby, Shenzhen Sonoff Technologies Co., Ltd. declares that the radio equipment type DUALR3, DUALR3 Lite is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at: https://sonoff.tech/compliance/
Interval de freqüència de funcionament de la UE:
- Wi-Fi: 802.11 b/g/n20: 2412–2472 MHz
- Wi-Fi: 802.11 n40: 2422-2462 MHz
- BLE: 2402-2480 MHz
Potència de sortida de la UE:
- Wi-Fi 2.4G: ≤20dBm
- BLE: ≤13dBm





