SONOFF MINI-D Dry Contact WiFi Smart Switch

1. Introducció

The SONOFF MINI-D is a versatile Wi-Fi dry contact smart switch designed for seamless integration into your smart home ecosystem. It supports both AC and DC power inputs and is compatible with the Matter protocol, allowing it to work across various third-party platforms such as Amazon Alexa, Google Home, Apple Home, and Home Assistant. This device enables remote control, voice control, and advanced automation features for a wide range of applications, including garage doors, HVAC systems, access control, and low-power DC solenoid valves or motors.

The MINI-D features an upgraded ESP32 chip for enhanced performance and offers functionalities like smart scenes, group control, power-on state configuration, and smart timers. Its dry contact output ensures safe and efficient control of various electrical devices without direct power output from the switch terminals.

Figure 1: SONOFF MINI-D Dry Contact WiFi Smart Switch

2. Informació de seguretat

Please read and understand all safety instructions before installation and operation. Failure to follow these instructions may result in electric shock, fire, or other serious injury or damage.

• **Professional Installation Recommended:** Electrical wiring should only be performed by qualified personnel.
• **Power Off Before Installation:** Always disconnect power at the circuit breaker before installing or servicing the device.
• **Voltage Compatibility:** Ensure the device's power input (AC or DC) matches your power source.
• **Dry Contact Nature:** The NO, COM, NC terminals are dry contacts and do not output power. They are for switching circuits only.
• **Simultaneous Power Input:** This device cannot be powered by both AC and DC power simultaneously.
• **Max Load:** Do not exceed the maximum load ratings for resistive loads (24V 2A Max) or motor loads (12/24V 8W).
• **Environmental Conditions:** Do not expose the device to moisture or extreme temperatures.

3. Contingut del paquet

• SONOFF MINI-D Dry Contact WiFi Smart Switch
• Manual d'usuari
• Accessoris de muntatge (si estan inclosos)

Figure 2: SONOFF MINI-D and its packaging

4. Especificacions

Figure 3: Physical dimensions and key specifications

5. Configuració i instal·lació

5.1 Instruccions de cablejat

The SONOFF MINI-D supports both AC and DC power inputs, but not simultaneously. It provides dry contact outputs (NO, COM, NC) for switching circuits. Ensure power is OFF before wiring.

Figure 4: Wiring diagrams for DC low power load and dry contact applications.

DC Low Power Load Wiring (Max 8W)

• **DC Input:** Connect 12-48V DC power to the DC+ and DC- terminals.
• **Load Connection:** Connect the DC low-power motor or solenoid valve (Max 8W) to the NO (Normally Open) and COM (Common) terminals.
• **Note:** This configuration is suitable for controlling devices like solenoid valves in irrigation systems.

Figura 5: Example of DC low-power solenoid valve wiring.

Dry Contact Wiring (for switching external circuits)

• **AC Input:** Connect 100-240V AC power to the N (Neutral) and L (Live) terminals.
• **Switch Connection:** Connect the external device's control input (e.g., garage door opener, boiler control) to the NO (Normally Open) and COM (Common) terminals. Alternatively, use NC (Normally Closed) and COM depending on the desired default state.
• **Important:** The NO/COM/NC terminals are isolated from the power input (N, L, S1, S2, DC+, DC-). They act as a switch, not a power source.

Figure 6: Diagram showing the isolated dry contact circuit.

Controlling Large Current with a Contactor

For controlling high-power systems, the MINI-D's dry contact output (rated 2A) can be used to switch a contactor. The contactor then handles the larger current for the load.

• Connect the MINI-D's NO/COM terminals to the control coil of a suitable contactor.
• The contactor's main contacts will then switch the high-power load.

Figure 7: Wiring diagram for controlling a large current via a contactor.

5.2 App Pairing and Matter Integration

The SONOFF MINI-D supports Matter, allowing it to be integrated into various smart home ecosystems. You will need a Matter-compatible hub for this integration.

Figura 8: Examples of Matter-compatible hubs (e.g., Echo Dot, Nest Mini, HomePod, SmartThings Hub).

1. **Power On:** After wiring, power on the MINI-D.
2. **eWeLink App (Initial Setup):** Download the eWeLink app from your app store. Follow the in-app instructions to add the MINI-D to your eWeLink account. This typically involves putting the device into pairing mode (refer to the device's LED indicator for status) and scanning for it in the app.
3. **Matter Pairing:** Once added to eWeLink, you can link it to your Matter-compatible hub (e.g., Amazon Alexa, Google Home, Apple Home, Home Assistant). Refer to your specific hub's instructions for adding Matter devices. This usually involves scanning a QR code or entering a pairing code provided by the eWeLink app or on the device itself.
4. **Update Smart Home Apps:** Ensure your smart home apps (Alexa, Google Home, Apple Home) are updated to the latest version for optimal Matter compatibility.

Figure 9: The MINI-D integrates with various Matter-compatible ecosystems.

6. Instruccions de funcionament

6.1 Control remot

Once successfully paired, you can control the MINI-D remotely via the eWeLink app or your chosen Matter-compatible smart home app (e.g., Alexa, Google Home, Apple Home). Simply tap the device icon in the app to toggle its state (ON/OFF).

6.2 Funcions intel·ligents

The MINI-D offers a range of smart features to enhance your home automation:

• **ON/OFF Control:** Basic switching functionality.
• **Smart Scenes:** Create custom automation rules based on conditions (e.g., time, sensor input, other device states).
• **Group Control:** Group multiple MINI-D devices or other smart devices to control them simultaneously.
• **Smart Timers:** Set schedules, countdowns, or loop timers for automated operation.
• **Power-on State:** Configure the device's state (ON/OFF/Resume) after a power outage.
• **Inching Setting:** Set the device to automatically turn off after a short period (e.g., for momentary actions like garage door pulses).
• **OTA (Over-The-Air) Updates:** Receive firmware updates for improved functionality and security (via eWeLink).

Figura 10: Mésview of smart features including Matter compatibility, ESP32 chip, dry contact, AC/DC input, contactor control, smart scene, power-on state, group control, and smart timer.

Figure 11: Compatibility matrix for features across eWeLink, Alexa, Google Home, Apple Home, and Home Assistant.

6.3 Aplicacions habituals

• **Garage Door Control:** Remotely open/close your garage door and integrate it into smart routines.


Figure 12: Upgrading a garage door system with MINI-D for remote control.

• **HVAC System Integration:** Control boiler equipment with dry contact input to enhance comfort and energy efficiency.

Figure 13: MINI-D integration with an HVAC system.
• **Thermostat Automation:** Build an automated thermostat system for intelligent temperature control.


Figure 14: MINI-D used in a thermostat automation system.

• **DC Low-Power Solenoid Valves/Motors:** Automate irrigation systems or other low-power DC applications.
• **Access Control Systems & Arm Barriers:** Integrate into existing access control systems for smart management.


Figure 15: Various applications including access control, arm barriers, garage doors, HVAC, and irrigation.

7. Manteniment

• **Cleaning:** Wipe the device with a dry, soft cloth. Do not use harsh chemicals or abrasive cleaners.
• **Firmware Updates:** Regularly check for and install firmware updates via the eWeLink app to ensure optimal performance and security.
• **Environmental Conditions:** Keep the device in a dry environment, away from direct sunlight and extreme temperatures.
• **Wiring Inspection:** Periodically inspect wiring connections to ensure they are secure and free from damage.

8. Solució De Problemes

9. Consells d'usuari

• **Understand Dry Contact:** Remember that the NO/COM/NC terminals provide a switching signal, not power. This is crucial for connecting to devices like garage door openers or boiler controls that expect a momentary contact closure.
• **Matter for Interoperability:** Leverage Matter compatibility to integrate the MINI-D into your preferred smart home ecosystem (Alexa, Google Home, Apple Home, Home Assistant) for unified control.
• **Use Inching Mode for Momentary Actions:** For devices like garage doors that require a brief pulse to activate, configure the 'Inching' feature in the eWeLink app. This ensures the contact closes for a set duration and then reopens automatically.
• **Energy Efficiency with Thermostat Automation:** Combine the MINI-D with a smart thermostat or temperature sensor to create intelligent heating/cooling schedules, optimizing comfort and reducing energy consumption.

10. Garantia i Suport

Per obtenir informació sobre la garantia, assistència tècnica o consultes de servei, consulteu la pàgina oficial de SONOFF. weblloc web o poseu-vos en contacte amb el vostre distribuïdor local. Conserveu el rebut de compra per a reclamacions de garantia.