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SONOFF Dongle Lite MG21

SONOFF / Dongle-LMG21

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Does the SONOFF Dongle Lite MG21 work with HomeKit, Alexa, and Google Home?

The Dongle Lite MG21 is a compact USB dongle that ships as a Zigbee coordinator, so it is the hub that plugs into a Home Assistant, Zigbee2MQTT or openHAB host.

It is built on a Silicon Labs EFR32MG21 and can be reflashed as a Zigbee router or with OpenThread firmware. It suits Home Assistant users through an integration (Zigbee).

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Unknown
Unknown
Google Home
Unknown
Unknown
Alexa
Unknown
Unknown
SmartThings
Unknown
Unknown
Home Assistant
Yes[1]
Zigbee, via ZHA

Key facts

SONOFF Dongle Lite MG21 facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[1]
List price$24.90[1] as of
Works withHome Assistant, Zigbee2MQTT, openHAB[1]
TypeUSB dongle, Zigbee and Thread[1]
ChipSilicon Labs EFR32MG21[1]
Ships withZigbee coordinator (EmberZNet)[1]
Thread RCP firmwareYes: OpenThread firmware[1] (Needs a Thread border router on a host. The dongle supplies the radio.)
In Home Assistant ZHA docsunknown
In Zigbee2MQTT docsunknown
ConnectionUSB, 0.5 m extension cable included[1]
Power5 V, 500 mA[1]

Integration paths

How the SONOFF Dongle Lite MG21 connects

2 pathsHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Matter / ThreadBROpenThread firmware, A host running a Thread border router[1]unknownunknownunknown
ZigbeeHUBZigbee coordinator software such as ZHA or Zigbee2MQTT[1]Yes[1]Coordinator firmware cannot be added to another gateway (one coordinator per Zigbee network), One application per dongle: ZHA or Zigbee2MQTT, not both at once[1]
About these columns
Requires
Hardware the path needs beyond the device and a controller.
Local
Yes when control on this path keeps working with the internet down.
Platforms
The platforms that work with the device on this path: Native (out of the box), Via integration (needs an add-on) or Not supported.

Home Assistant and Homey

Roles in a smart home

Infrastructure roles

How facts are sourced: every cell cites its source below
RoleActs as one
Thread border routerunknown
Matter controllerunknown
Zigbee coordinatorYes[1]

Cite this page

SONOFF Dongle Lite MG21. Smart Home Canon. https://smarthomecanon.com/devices/sonoff-dongle-lite-mg21. Last checked 2026-10-09.

Sources

  1. [1]
    MFRsonoff.tech / SONOFF Dongle Lite MG21 product page
    Accessed Back to text