Using Thread Border Router of Echo Show 15 for HA?

Configuration Matter/Thread
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Do I need to connect a Thread border router dongle to Home Assistant if my Echo Show 15 (2nd Gen) already has one?

In other words, can I use the Echo Show 15’s built-in Thread border router to add Matter devices to Home Assistant?

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You can use the Echo Show 15’s TBR to route packets between its Thread mesh and your LAN. It should be detected and appear (read-only) in the HA Thread settings as long as it’s in the same subnet/vlan as HA.

To add Matter-over-Thread devices to Home Assistant on an Amazon Thread mesh, you will likely need to follow a 2-step process**

  1. Use the Alexa app to add the device to the Echo Show 15 Matter fabric (and therefore your Thread network)
  2. Use the “sharing” (multi-fabric) feature to obtain a code and add the device to the HA Matter fabric as well. Once it’s in the HA fabric, you can remove from the Amazon fabric with no impact.

** the reason for this is that Amazon does not have a method of syncing its mesh credentials with HA, so only the Alexa app knows the credentials. This could change in newer versions of the app and/or Thread standard.

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Hi,
I know this is an old topic but I am having some issue since yesterday. I bought the Matter ikea motion sensor, I paired it through the echo show 15 ( 2nd gen). I am unable to see the QR code to add it to HA. On a side note, when I try to run a routine and try to add that sensor it show that the device is unsupported. Not sure if it’s related or not.

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Hi, welcome to the community. One a matter device has been added to a fabric, there are no more QR codes you can use. To share with a second fabric, the app generates a 9-digit sharing code to use in HA commissioning flow if you say, “yes, it’s already in use”.

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Hi, I managed to get the code finally but I had to refresh a few times…