Compact USB Dongle [SONOFF DONGLE-LMG21 ZIGBEE/T USB] .::. Communica Online

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A Compact USB Dongle with ZIGBEE 3.0/Openthread Support, EFR32MG21 Chip, Enabling Reliable Local Smart-Home Control on Home Assistant or ZIGBEE2MQTT. [SONOFF DONGLE-LMG21 ZIGBEE/T USB]

Compact USB Dongle

Dongle

A Compact USB Dongle with ZIGBEE 3.0/Openthread Support, EFR32MG21 Chip, Enabling Reliable Local Smart-Home Control on Home Assistant or ZIGBEE2MQTT.

Part No: SONOFF DONGLE-LMG21 ZIGBEE/T USB

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Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE

Overview

The SONOFF Dongle-LMG21 (Dongle Lite MG21) is a compact USB Zigbee 3.0 coordinator that lets you create fast, reliable local control with Home Assistant, Zigbee2MQTT, openHAB, and other platforms. Built on the EFR32MG21 radio, the hardware provides a stable Zigbee mesh network, allowing bulbs, switches, and sensors from different brands to be paired and controlled within a single system.

The dongle works in a Plug&Play manner on Windows, Ubuntu, and Raspberry Pi OS (including Docker environments), and its external, ≤180° adjustable antenna delivers better range. For advanced users, flashable firmware is available (Zigbee NCP/Router, OpenThread RCP, MultiPAN), enabling configuration for multiple network roles as needed.

A cost-effective entry-/mid-tier solution for building your own Zigbee network with DIY-focused community support. Ideal as the backbone of small to medium smart homes.

Features

Compact Zigbee coordinator: build a stable Zigbee 3.0 mesh network with cross-brand device pairing.
Wide platform support: works with Home Assistant (ZHA), Zigbee2MQTT, openHAB, ioBroker, Domoticz, and Jeedom.
Plug&Play setup: quick commissioning on Windows, Ubuntu, Raspberry Pi OS, and in Docker environments.
Flashable firmware: Zigbee NCP/Router, OpenThread RCP, and MultiPAN modes for advanced configurations.
External antenna: ≤180° adjustable for improved signal strength and range.

Smart Home Protocols and Platform Compatibility

Supported protocols: Zigbee 3.0 (default); in advanced mode OpenThread RCP / MultiPAN (depending on firmware).
Compatible platforms: Home Assistant (ZHA), Zigbee2MQTT, openHAB, ioBroker, Domoticz, Jeedom.
Local control: manage paired Zigbee devices over LAN without the cloud.
Operating systems: Windows, Ubuntu, Raspberry Pi OS; also usable with Docker.

Smart Features

Create a Zigbee mesh: build a stable, scalable network with your own coordinator and unify devices.
Cross-brand device management: integrate bulbs, switches, and sensors from various manufacturers.
Advanced modes: with firmware swap, set up Router/RCP/MultiPAN modes for specialized use cases.

Specifications

Power supply: 5 V⎓ / 500 mA (via USB)

Enclosure: PC+ABS housing.
External antenna: adjustable, ≤180°.
DIY focus: community guides available for advanced features (e.g., firmware flashing).

Model: SONOFF Dongle-LMG21 (Dongle Lite MG21)
SoC / radio: Silicon Labs EFR32MG21
Protocol: Zigbee 3.0 (flashable: Zigbee NCP/Router, OpenThread RCP, MultiPAN)
Compatibility: Home Assistant (ZHA), Zigbee2MQTT, openHAB, ioBroker, Domoticz, Jeedom
OS support: Windows, Ubuntu, Raspberry Pi OS; Docker
Power: 5 V⎓ / 500 mA (USB)
Dimensions: 133 × 18.6 × 10.1 mm
Operating temperature: 10–60 °C
Humidity: 5–95% RH
Note: Thread/MultiPAN features require a firmware update; setup is recommended for advanced users.