Sonoff MINI-D Dry WiFi Smart Switch with Matter

Power the device and connect it to your 2.4GHz WiFi network via the manufacturer's app. Enable the Matter protocol within the app settings to commission the device. Then, use the standard Matter pairing process (e.g., QR code scan) in your preferred ecosystem app like Apple Home, Google Home, or Alexa to add the switch for local control and automation.

A dry contact output is a relay that simply opens or closes a circuit without supplying any voltage itself. It provides complete electrical isolation for safety. You can use it to control garage door opener buttons, HVAC thermostat signals, low-power DC solenoid valves, or the coil of an external contactor. The contactor can then safely switch high-power AC loads like motors or heaters that the MINI-D's 2A circuit cannot handle directly.

Yes, as it uses a standard ESP32-D0WDR2 microcontroller. You will need to access the serial programming pins (TX, RX, GPIO0, EN) typically located on the board. Using a USB-to-serial adapter, you can flash custom firmware like Tasmota or ESPHome via tools like ESPtool or PlatformIO. This allows for local MQTT control and advanced automation, but note that it will replace the stock Matter-enabled firmware.