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Description
SONOFF DONGLE-LMG21 ZIGBEE/T USBA Compact USB Dongle with ZIGBEE 3. 0 Openthread Support, EFR32MG21 Chip, Enabling Reliable Local Smart Home Control on Home Assistant or ZIGBEE2MQTT. Compact USB Dongle 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
A Compact USB Dongle with ZIGBEE 3.0/Openthread Support, EFR32MG21 Chip, Enabling Reliable Local Smart-Home Control on Home Assistant or ZIGBEE2MQTT.
Compact USB Dongle
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.
Additional Information
| Device | Dongle |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.7 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Can Bree lead her team to victory?
Format: Hardcover
Swim Team by Johnnie Christmas is a graphic novel that follows Bree, a city kid from New York who moves to Florida due to her dad's new job. Excited to join math puzzles on her first day at her new school, Bree instead finds herself being assigned to swim 101, but there is just one problem: Bree can't swim. Faced with potentially failing the class, Bree's elderly neighbor Etta, who was once a swim team captain, offers to teach her. With Etta’s training and a lot of hard work, Bree suddenly finds herself on the school's failing swim team. With her school considering selling the land the pool resides on, Bree is determined to lead her team to victory at the state championship and save the pool.
This book touches on topics such as anxiety, racism, family dynamics, sports, and friendship. I found the honest exploration provided a powerful lesson of how our circumstances shape us but don't control us. As a former swim team captain myself, I really resonated with this book: I felt it perfectly captured the swim team dynamic, and the high-action illustrations of swim team meets were breath-taking. Personally, I found this book to be wonderfully nostalgic; I could almost smell the chlorine and feel the diving block beneath my feet as I read it. Overall, I think Swim Team would be a major hit in elementary and middle school libraries.
@TheHeterogeneousReader
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Reviewed in the United States on October 21, 2024
★★★★★ 5
OH YEAH!👍🏻
Format: Kindle
I love to swim and this book was fantastic! Hope you have fun reading it to. My favorite character was Bree by the way
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Reviewed in the United States on January 21, 2026
★★★★★ 5
Good for Raina Telgemeir fans
Format: Paperback
My 10-14 year olds loved this book. It’s a great story. They also really liked the Raina Telgemeir books.
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Reviewed in the United States on October 19, 2025
★★★★★ 4
3.5
Format: Kindle
A decent read, it wrestles a bit with a couple of different topics of anxiety, racism, family dynamics, sports, and friendship in fits and bursts. I guess my main critique was it felt a bit shallow (no pun intended) with most issues resolved rather quickly and easily once characters put their minds to it. The Hollyhoke's team also seemed to be pretty toxic making it a wonder why someone would want to go there other than that it's wealthy.
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Reviewed in the United States on July 28, 2023
★★★★★ 5
I really enjoyed this book of short stories
Format: Paperback
I loved this book. It was the first time
I ever read anything by Simone De Beauvoir.
It is difficult but I think the title story
was my favorite, watching the character go
down hill so rapidly and in such detail
showing her growing obession was oddly
relatable, her self hatred towards her body
towards the end of the story
I would not try and presume to state what the
"moral" of the story was... but that is exactly what I am
going to do about now
check it....................
I think that the main Character should have
developed a concept of self outside her marriage
her marriage was her identity and when that fell
apart she had nothing...no sense of self
it was a compelling read a little uncomfortable
but I like being a littel uncomfortable when I read............
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Reviewed in the United States on September 5, 2013