Product Overview

Introduction

Product Name	SONOFF MINI Dry Wi-Fi Smart Switch (Dry Contact Relay)
Product Model	MINI-D

MINI-D is a Wi-Fi dry contact smart switch that supports AC/DC power supply. It can be used to control motors, garage doors, and other dry contact input devices, offering remote control, voice control, and other functions through APP. It also supports the Matter protocol, allowing seamless integration with smart devices from other brands to build your home automation system.

Highlights

• Wi-Fi Connectivity: Connect directly to your home Wi-Fi network for full control of your lights and appliances from anywhere via the app.
• Matter Protocol: With Matter protocol support, MINI-D ensures seamless integration with other brands and ecosystems, allowing you to build a unified and efficient smart home setup.

  Notice: The product supports Matter platforms like Apple Home, Google Home, Alexa, Home Assistant, and Samsung SmartThings. Only support basic functions (on/off).

• AC/DC Power Supply: Compatible with AC and DC power sources, ensuring flexible installation in various environments.
• Dry Contact Support: Perfect for controlling dry contact devices such as motors, garage doors, gates, and other specialized equipment.
• DC Low-Power Motor Support (Max 8W): Specifically engineered to control DC low-power motor loads up to 8W, making it a perfectly smart control for DC low-power systems.

Applications

• Dry Contact Control Applications

• • Garage Doors

Enable remote/voice control for opening or closing garage doors securely and conveniently.

• • Access Control Systems

Integrate with electric locks or gate systems for smarter entry and exit automation.

• • HVAC Systems

Trigger air conditioning units, ventilation fans, or climate controllers that use dry contact inputs.

• • Heating Systems

Control boilers or heaters in temperature-sensitive scenarios via app, schedule, or automation scenes.

• DC Low-Power Load Applications (up to 8W)

• • Solenoid Valves

Automate irrigation, water distribution, or fluid control systems in agriculture or smart gardens.

• • Motors

Operate small curtain motors, mini fans, or other DC-driven actuators in home or industrial use.

• • Irrigation & Sprinkler Systems

Schedule or trigger water flow remotely to optimize watering routines and conserve resources.

• etc...

Specification

Model	MINI-D
MCU	ESP32-D0WDR2
Rating	100-240V~ 50/60Hz 0.1A Max OR 12-48V⎓1A Max μ
Load	24V⎓2A Max Resistive load OR 12/24V⎓8W
Wireless Connectivity	Wi-Fi: IEEE 802.11 b/g/n 2.4GHz
Wire Diameter	φ0.5-2.5mm（24-14AWG）
Standby Power Consumption	About 1W
Net Weight	34.5g
Dimension	41x43x21.5mm
Color	White
Casing Material	PC
Applicable Place	Indoor
Working Temperature	10T40 (-10℃~40℃)
Working Humidity	5%~95% RH, non-condensing
Working height	Less than 2000m
Certification	CE/FCC/RoHS
Executive standard	EN 60669-2-1

Key Features

eWeLink Platform

Notice: This functionality is available only when the device is paired with the eWeLink app. For capabilities when the device is paired via Matter with Alexa, Google Home, or other Matter platforms, refer to Key Features >> Matter Platform.

Device Home Page Functions
Key Features	Feature Description
On / Off	Device on/off state
Schedule	Set the device to complete the specified action at the specified time.
Timer	Set delayed actions for the device to execute after a specified time
Loop Timer	The device executes a predefined action cyclically at specified time intervals.

Device Settings
Key Features		Feature Description
​ ​ ​ Third-party Platforms ​ ​ ​ ​	Alexa	​ ​ ​ You can control your smart devices through third-party services, including voice control. ​
	Google Home
	IFTTT
	SmartThings
	Alice
Assign location		Set up the home and room where the device is located.
Share		The device can be shared with other eweLink accounts.
Create Group		After multiple devices are created into a group, you can synchronize all devices in the group.
​ ​ Smart Scene ​	Trigger Condition	On/Off External switch [Click] When Detach Relay is enabled, this additional trigger condition is added to the scene.
	Execution Action	On/Off/Reverse
​ LAN Control ​		A control method where the app communicates directly with the device over the same router, without going through the cloud platform. On/Off
​ 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.
​ ​ Switch Mode ​	Mode	External Tigger Mode Setting: Pulse Mode/Edge Mode/Following Mode
	Detach Relay	The states of external switches and relays are separated or not. Enable/Disable
​ 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. On/Off
​ Offline Alert ​		Turn on the "Offline Notifications" feature, and grant eWeLink notification permissions in Phone Settings > Permissions. You will receive a mobile push notification 5 minutes after the device goes offline. On/Off
Logs		Records of device status changes. (You can view the operation records of the past three months)
Network Indicator		On/Off
​ ​ Power-on State		The switch state of the device when power is restored after a power outage. On/Off/Last State/Reverse Last State
		Power-on State will be delayed for the time you set. Enable/Disable Duration range: 0.5s~59min 59.5s
​ ​ Inching Settings ​		The device automatically turns off/turns on after being on for a specified duration. Enable/Disable Duration range: 0.5s~23h 59min 59.5s Status: Auto-on/Auto-off
Wi-Fi Settings		Configure the WiFi network connected to the device.
Enable Pairing Mode		The device will enter pairing mode, allowing you to add it to a Matter platform like Apple, Alexa, or Google. After 10 minutes, the device will automatically exit pairing mode.
Delete Device		Remove the device from the eWeLink platform.

Matter Platform

Notice： To use voice control with Home Assistant, you need to purchase the official Home Assistant speaker (Home Assistant Voice) separately.

Platforms and Capabilities	Apple Home	Google Home	Alexa	Home Assistant
On/Off	√	√	√	√
Voice Control	√	√	√	√*
Scene	√	√	√	√
​	Learn more	Learn more	Learn more	Learn more

Installation and Configuration Guide

①Button

Button	Description
Single press	Turn on/off the device
Press & hold 5 seconds	Device enters the pairing mode (Pairing time 10 minutes)
Triple short press	Switches the external switch type

 

Notice: The device's factory default is the rocker switch. To switch to the momentary switch, you need to short-press the device button three times. If the blue light flashes three times, it means the switch is successful. External switch trigger mode switching sequence (cycle): Edge Mode → Pulse Mode → Following Mode

② LED indicator (Blue)

LED Indicator (Blue)	Description
Keeps on	Online
Flashes once	Offline
Flashes twice	LAN connection active
Flashes two short + one long	In Pairing Mode
Flashes three times	External switch type changed

③ Input/Output Terminal

Terminals	Description
NO	Normally Open (Output Terminal)
COM	Common (Output Terminal)
NC	Normally Closed (Output Terminal)
N	Neutral (Input Terminal)
L	Live (Input Terminal)
S1	External Switch (Input Terminal)
S2	External Switch (Input Terminal)
DC+	12V-48V DC Positive (Input Terminal)
DC-	12V-48V DC Negative (Input Terminal)

Wiring Diagrams

WARNING: To ensure the safety of your electrical installation, it's essential either a Miniature Circuit Breaker (MCB) or a Residual Current operated Cicuit-breaker with Integral Overcurrent protection(RCBO) with an electrical rating of 10A that meets national safety standards has been installed before the MINI-D. An overcurrent protection device with a rated current of 3A needs to be used in the control circuit of the MINI-D. This device cannot be powered by both AC and DC power simultaneously. Make sure all wires are connected correctly.

• DC low-power load wiring 

 

• Dry contact wiring

Notice: Applicable to devices that can be controlled via dry contact. To ensure compatibility with the garage door motor, please short-circuit the terminals of the motor that were originally used to connect to the wall switch ( the short-circuiting process is safe, so don't worry). If the garage door motor operates after short-circuiting, it is compatible; if the motor does not operate, it is not compatible.

 

Terminals	​	Wires	​
NO	Normally Open (Output Terminal)	​	​
COM	Common (Output Terminal)	​	​
NC	Normally Closed (Output Terminal)	​	​
N	Neutral (Input Terminal)	N	Neutral Wire
L	Live (Input Terminal)	L	Live (100~240V) Wire
S1	External Switch (Input Terminal)	​	​
S2	External Switch (Input Terminal)	​	​
DC+	12V-48V DC Positive (Input Terminal)	+	12V-48V DC Positive Wire
DC-	12V-48V DC Negative (Input Terminal)	-	12V-48V DC Negative Wire

Add Device

eWeLink Platform

Open eWeLink to scan the QR code on the Quick Guide or the device itself to add the device.

Enter "Scan".	Scan the QR code on the device.	Select "Add Device".
Power on the device.	Long press the button for 5 seconds.	Check Wi-Fi LED indicator flashing status (Two short and one long).
Search for the device and start connecting.	Select the "Wi-Fi" network and enter the password.	Device "Added completely".

Matter Platform

Open a Matter-compatible App to scan the Matter QR code on the Quick Guide or the device itself to add the device.

Add to Apple via Matter

Add to Google via Matter

Add to Alexa via Matter

Add to SmartThings via Matter

Add to Home Assiatant via Matter

FAQ

1. What is MINI-D?

MINI-D is a Wi-Fi-enabled dry contact smart switch designed to control motors, garage doors, and other dry contact input devices. It supports remote control, voice control, and more via a mobile app.

2. What type of power supply does MINI-D support?

MINI-D supports both AC (alternating current) and DC (direct current) power inputs. Please refer to the product specifications for the exact voltage ranges. Note: Do not connect AC and DC power sources at the same time.

3. What types of loads are supported by the MINI-D output terminal?

Dry-contact input devices: Such as garage door motors and boilers in temperature control systems, which are triggered by a dry contact signal.

Low-power DC devices: Including small DC motors or solenoid valves, with a maximum load of 8W.

Note: The output terminal of the MINI-D supports only DC loads. AC loads are not supported and should not be connected under any circumstances.

4. Can I use MINI-D with other platforms like Apple HomeKit or SmartThings?

Yes, if those platforms support the Matter protocol. Please refer to the "Key Features >> Matter Platform" section for specific compatibility and feature limitations.

Troubleshooting

1. Cannot connect to the Wi-Fi network？

Check Wi-Fi signal: Ensure the Wi-Fi signal is strong and the device is not too far from the router.

Verify network settings: Make sure you're using a 2.4GHz Wi-Fi network, as MINI-D only supports the 2.4GHz band.

Restart the device and router: Power cycle the device, wait a few seconds, and reconnect. Restart the router to ensure there is no interference.

2. Cannot pair with the eWeLink app?

Ensure pairing mode is activated: Ensure the device is in pairing mode (indicator light flashing).

Check eWeLink account: Ensure you're logged into the correct eWeLink account and that the app is up to date.

Incorrect Wi-Fi password: Double-check the Wi-Fi password for accuracy and ensure there are no special characters or spaces.

Device too far from router: Ensure the device is within range of a strong Wi-Fi signal to avoid interference.

3. Device not compatible with other Matter platforms

Check Matter support: Ensure the smart platform you're connecting to (e.g., Apple HomeKit, SmartThings) supports the Matter protocol, and that MINI-D is running the latest firmware.

Ensure stable network connection: The Matter protocol requires a stable network connection between the devices and platforms.

4. Device is slow to respond or unstable

Network latency: Remote or voice control might experience latency due to network issues. Try moving closer to the router or optimizing the Wi-Fi signal.

Check for available firmware updates, and update the device to resolve any issues.

Application Explore

1:1 scale 3D model of the SONOFF MINI-D
This is a 1:1 scale replica model of the SONOFF MINI-D, created to help users verify its installation fit and assist in accessory design. The model accurately reproduces the full enclosure dimensions, terminal positions and sizes, as well as the placement of the button and LED indicator — making it ideal for evaluating compatibility before purchase or prototyping.
Access Link: 1:1 scale 3D model of the SONOFF MINI-D

Know more

For a detailed guide and review of the SONOFF MINI-D, visit our free course at the SONOFF Academy.