The SONOFF Dongle-LMG21 (Dongle Lite MG21) is a compact USB Zigbee 3.0 coordinator that enables the creation of fast and reliable local control with platforms such as Home Assistant, Zigbee2MQTT, openHAB, and others. Built on the EFR32MG21 radio, the hardware provides a stable Zigbee mesh network, allowing connection and control of bulbs, switches, and sensors from different brands within a single system.

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

Main Product Features

• Compact Zigbee coordinator: create a stable Zigbee 3.0 mesh network connecting devices from different brands.
• Wide platform support: works with Home Assistant (ZHA), Zigbee2MQTT, openHAB, ioBroker, Domoticz, and Jeedom.
• Plug&Play setup: quick start on Windows, Ubuntu, Raspberry Pi OS, and Docker environments.
• Re-flashable firmware: Zigbee NCP/Router, OpenThread RCP, and MultiPAN for advanced configurations.
• External antenna: adjustable ≤180° for improved signal strength and range.

Technical Specifications

• Model: SONOFF Dongle-LMG21 (Dongle Lite MG21)
• SoC / radio: Silicon Labs EFR32MG21
• Protocol: Zigbee 3.0 (re-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
• Relative humidity: 5–95% RH