Matter Devices (Aqara and Kasa) Not Connecting to HA

[whatatinkerer]

The problem

I recently changed my network system to Unifi and since then it seems to be giving me some issues with adding Matter devices such as Aqara FP2 sensor or Kasa smart plugs. I currently have Google Nest, Apple TV 4K and Aqara M3 (just in case it needed it to connect), but when I add them to their respective apps then check Apple Home app, it shows as not responsive and then when I remove it and try to add to the Matter (BETA), it just hangs there saying its connecting or cannot connect to it.

What version of Home Assistant Core has the issue?

core-2024.8.2

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Matter (BETA)

Link to integration documentation on our website

No response

Diagnostics information

024-08-22 09:41:11.212 (Dummy-2) CHIP_ERROR [chip.native.EM] Failed to Send CHIP MessageCounter:42354603 on exchange 27490i with Node: <0000000000000000, 0> sendCount: 4 max retries: 4

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[whatatinkerer]

I have tried factory resetting those sensors and plugs and even got new ones just to see, but same issue occurs.

[home-assistant[bot]]

Hey there @home-assistant/matter, mind taking a look at this issue as it has been labeled with an integration (matter) you are listed as a code owner for? Thanks!

Code owner commands

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[marcelveldt]

Aqara FP2 is not a Matter device. Furthermore you should read our full documentation about Matter and requirements to networking. Most issues we get reported are from Unifi networks because by default this has some Enterprise-level defaults which harm domestic protocols such as Matter. These tips should help you get things going again.

• Use a flat network, no vlans. If you really want to use a separate IoT network, make sure that HA/Matter server lives in that same IoT network (and make sure to connect your phone to that network while commissioning new devices)
• Disable mdns forwarders (Unifi calls this multicast DNS in their interface) - it will HURT the Matter traffic big time.
• Disable "multicast optimizations" on the WiFi settings

I'm going to close this issue here as this is not a support forum to troubleshoot network issues. Maybe join our discord server (matter channel) for community support if the above tips didnt help.