[Feature] support multiple network interfaces in one Matter device

[chshu]

Feature description

The feature aims to support the use case that a Matter device could run over multiple network interfaces, like on both Wi-Fi and Thread networks. Two typical scenarios:

• A Camera works on Wi-Fi for video streaming, and on Thread for low power sensor data during sleep mode;
• A bulb supports both Wi-Fi and Thread, the consumer could choose to commission the bulb to Wi-Fi or Thread network, depends on whether there is Thread BR in their home or not.

As described in the Matter spec: Network Commissioning Cluster, a Matter device may has one or more network interfaces, each interface should has an instance of the Network Commissioning Cluster.

Platform

all

Platform Version(s)

No response

Anything else?

No response

[bzbarsky-apple]

@chshu I believe this is supported already at least on Linux for the all-clusters app. What is the actual scope of the feature work being talked about here? Supporting it on specific platforms (which ones)? Something else?

[chshu]

When we tried to enable the feature on ESP platform, some changes are required in the platform mDNS implementation to make the Wi-Fi and Thread coexist in single firmware, the PR will come out soon. So I filed this issue to record the SDK changes.

Meantime, we tested the commissioner from ecosystems (Google/Apple), and found the feature is not supported yet. The Apps commission the device to the network interface indicated by endpoint 0, but both abort at some following commissioning steps.

@bzbarsky-apple Do you have any info about the support plan by Apple ecosystem?

[bzbarsky-apple]

@chshu I can't comment on future releases.