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Home Assistant TestFlight
SONOFF

Sonoff MG21 Thread dongle

Bridges and Hubs · And More

WorksLocal

1 report: 1 says it works.

Reported on r/homeassistant with OTBR.

What people report

IntegrationIn Home AssistantIn Apple HomeWhat they saidSource
OTBRWorks LocalOpen Thread Border Router with IKEA devices without a single issue
Saved copy
Maybe it is the integration of the IKEA hub and the google device into HA which is causing this. I‘ve created a Open Thread Border Router with a Sonoff MG21 dongle and had not a single issue with any of the IKEA devices so far.

Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23.

Reddit comment · 2026-04

Each row is one report from a GitHub thread, an integration’s docs, or r/homeassistant. Check the date and the linked source before you buy.

In ReReHome

Once Home Assistant’s HomeKit Bridge shares it, this device reaches Apple Home as a HomeKit accessory behind your Home Assistant bridge, so ReReHome shows and controls it like any other.

Identifiers

BrandSONOFF
ModelMG21
CategoryBridges and Hubs