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SONOFF Dongle-LMG21 Zigbe Thread USB Dongle EFR32MG21 Compact Size Zigbe Coordinator for Home Assistant Zigbee2MQTT Matter Open Source
The SONOFF Dongle-LMG21 Zigbe Thread USB Dongle EFR32MG21 Compact Size Zigbe Coordinator for Home Assistant Zigbee2MQTT Matter Open Source by SONOFF is a mid-range product designed for everyday users.
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Type: Dongle-LMG21
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About This Product
The SONOFF Dongle-LMG21 Zigbe Thread USB Dongle EFR32MG21 Compact Size Zigbe Coordinator for Home Assistant Zigbee2MQTT Matter Open Source by SONOFF is a mid-range designed for everyday users. It delivers reliable performance at an accessible price.
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Specifications:
Brand: SONOFF
Model: Dongle-LMG21
Chip: EFR32MG21
Connection: USB
Input: 5V/500mA
Wireless Protocol: Zigbe IEEE 802.15.4
Antenna Gain: 2dBi (Max 3dBi)
Casing Materials: Aluminum Alloy, PC+ABS
Working Temperature: -10°C to 60°C
Dimensions (Dongle Body): 43mm x 18.5mm
Color: Dim Gray
Features:
1. Wide Open-Source Compatibility: Plug-and-play with popular platforms including Home Assistant, Zigbee2MQTT, openHAB, and ioBroker for total local control.
2. Flexible Firmware Roles: Ships pre-flashed as a Zigbe Coordinator. Can be easily flashed to function as a Zigbe Router to extend your network, or as a Thread/MultiPAN device for Matter compatibility.
3. Provens and Stable Core: Powered by the Silicon Labs EFR32MG21 SoC, providing a reliable and responsive connection for your smart home devices.
4. Enhanced Signal Coverage: Features an external adjustable antenna designed to optimize signal strength and provide wide, stable coverage throughout your space.
5. Ultra-Compact Design: The ultrasonic-welded housing is 65% smaller than previous models, allowing for easy installation in tight spaces without blocking adjacent USB ports.
6. Dedicated Web Flasher: Update or change firmware in minutes using a simple web-based tool. No complex command lines needed, making it accessible for all user levels.
Package Includes:
1 x Dongle Lite MG21 USB Dongle
1 x USB Extension Cable
1 x User Manual
















