SONOFF MINI-DIM is an ultra-compact, in-wall (can be built into an assembly box) smart dimmer that makes existing lighting circuits smart with a Matter over Wi-Fi connection. The dimmer handles most dimmable 230 V light sources smoothly and flicker-free (LED, bulb, halogen, dimmable electronic transformer), so even "classic" light fixtures can be easily integrated into a unified smart home.

MINI-DIM SONOFF Mini Extreme is only a few centimeters, the module can be built behind the wall switch and retains the usual manual control (push-button/momentary and rocker switches are supported). Built-in automatic and manual calibration allows accurate percentage brightness adjustment, and overheating protection and power detection increase safety and compatibility.

Thanks to the Matter standard, MINI-DIM can be easily integrated into the Apple Home, Google Home, Amazon Alexa, SmartThings and Home Assistant (Matter) ecosystems. Timings, scenes and automations can be set, and quick Plug&Play pairing guides you through the installation process. The module requires a neutral conductor and can only be used on a single-phase (220-240 V~) network.

Main product features

- Matter over Wi-Fi: multi-platform, brand-independent integration (Apple Home/Google Home/Alexa/SmartThings/Home Assistant).
- Ultra-compact installation: Mini Extreme size fits comfortably in the box behind the wall switch.
- Wide lamp compatibility: support for dimmable LED, incandescent, halogen and dimmable electronic transformer.
- Uniform brightness adjustment: automatic and manual brightness range calibration for percentage control.
- Safety functions: overheating protection and power detection.
- Flexible switch management: push button (momentary) and flip wall switch support.

Smart home protocols and platform compatibility

- Protocol: Matter over Wi-Fi (IEEE 802.11 b/g/n, 2.4 GHz).
- Ecosystems: Apple Home, Google Home, Amazon Alexa, Samsung SmartThings, Home Assistant (Matter).
- EWeLink mode: pairing and configuration is also possible from the eWeLink app.
- Local control: works even without internet with the external wall switch; the platform support is optimized for local/material operation.

Smart functions

- Remote on/off and dimming: from app, voice or automation.
- Timings and delays: scheduled on/off, delayed off.
- Automatic/manual calibration: precise, percentage brightness scale can be set.
- Scenes: coordinated control of several devices (e.g. evening routine, cinema mode).

Technical specifications

- Product / series: SONOFF MINI-DIM / MINI Extreme
- Type: Matter over Wi-Fi smart dimmer (in assembly box)
- MCU: ESP32-C3
- Power supply / network: 220–240 V~ 50 Hz (single-phase); neutral conductor is required
- Nominal load capacity: 400 W (resistive); LED: 200 VA
- Supported light sources: dimmable LED, bulb, halogen, dimmable electronic transformer
- Wireless connection: Wi-Fi 2.4 GHz (IEEE 802.11 b/g/n); Matter support
- External switch input: S1/S2 push button (momentary) and rocker;
- Protections: overheating protection; performance recognition
- Calibration: automatic / manual (with device button or from app)
- Recommended wire: 18-16 AWG solid/stranded copper
- Cover / color: PC; white
- Dimensions / weight: 45 × 39.4 × 16.8 mm; 24.5 g
- Operating environment: indoor; −10…+40 °C; 5-95% RH (non-condensing)
- Certificates: CE / RoHS
- Note: only for single-phase 220-240 V~ network; the installation must be carried out by an electrician