r/MatterProtocol

Original post is below.

Additional context I did not share earlier:

• The hub is Dirigera, hooked via Ethernet to a Deco X50 mesh (3 routers)
• IPv6 is enabled, with SLAAC + DHCPv6
• Earlier did experiments disabling Fast Roaming and SIP ALG. No IGMP option is shared in the app

Not sure why, but I followed one of the comments below:

1. Disconnected the hub from power for a while, like 30 minutes
2. Reconnected the hub
3. Disabled Bluetooth on my phone
4. Reset the Bilresa light switch
5. Start the pairing process

And it just worked.

No freaking clue why. My guess is that disconnecting the hub for a long time forced a IPv6 configuration refresh.

Thanks to that, I can also access the hub via Thread Tools.

An additional thing is that I run AdGuard on my phone, so I explicitly whitelisted Google Play Services and Ikea Home Smart; disabling it earlier did nothing, having them whitelisted worked. Not sure if this was helpful, but it is worth mentioning.

That's all, now the original post:

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As per title.

I am no Matter nor Thread expert, but working in IT I am used to experiment.

We've purchased recently a Matter light switch and struggled to connect it to the hub. Old Zigbee devices work with no issues.

With some digging, I found the Thread Tools app, where I can easily replicate the error: the Dirigera Thread Border Router rejects the connection with no explanation.

I've tried to:

1. Add the light switch via the official Ikea Home Smart app
2. Add the Thread network via the integration option in Google Home
3. Add the light switch via Google Home
4. Connect via the Thread Tools app

All of them fail. Case 2 allow the addition but all the devices result offline; in all other cases, the connection is directly rejected.

The only operation that I can perform is to reset the network. Other than that, it show no other signs of life.

I would love further input; the customer support just said they acknowledge the issue and will solve it "soon".

Here’s my set up

Govee Floor Lamp 2
Tri-Band wireless router 2.4, 5, 5.8ghz all on the same SSID
iOS 27, iPhone 16
Apple TV 4K

I understand that my lamp needs to connect to a 2.4 GHz network. So when I set up this lamp, I went in to my wireless router settings and turned off the 5.0 and 5.8 GHz radios and only use the 2.4 GHz radio. The network name SSID is the same. That way my iPhone is on a 2.4ghz network when it pairs with the lamp and the lamp can see the 2.4ghz network.

I add the lamp to the home app via matter and everything pairs successfully.

After things pair successfully, on my iPhone I can turn off my Wi-Fi and still control the lamp through the Internet, using cellular data.

However, when I turn the 5.0GHz and 5.8 GHz radio back on, on my router, the lamp becomes unresponsive inside the Home app. With that said, it still works fine through the official Govee app. So I’ve deduced it still has a wifi signal.

I’m not sure why the matter protocol stops working once I turn 5ghz network back on.

I have other matter, accessories, connected to the same network and don’t have any issues, including a Govee curtain light.

Any ideas?

UPDATE:
TLDR: IT WAS A SETTING IN MY ROUTER. IN LAN IPV6 SETTINGS, Look for Advanced Router Advertisement Configuration. Then look for interval for periodic RA messages. Set Max to 60 and Min to 20. Save and reboot your Govee lamp and HomeKit hub, likely your Apple TV.

I just moved into my new room at a flat I am sharing. Since I have lots of small lights in my room I wanted to be able to manage them as a group turn them in and off all at once. I tried using some cheap smart outlets from Amazon but they ended up connecting really badly so I send them back and baught 4 ikea Grillplats outlets that are matter over thread. I thaught I could use My Apple TV 4K 3rd gen but I have the Modell without thread. So I baught an additional Yeelight Smart hub E1 that’s supposed to act as thread border router.

Now First I struggled forever to even get the e1 setup because it would always crash during setup. After I got it connected, who knows how, I thaught nice now comes the easy part… but now I can’t get the ikea stuff connected to the e1 I tried setting them up via the apple home app which then tells me there is no border router and I tried setting them up through the Yeelight pro app which starts the set up and let’s me chose the e1 as border router but ultimately crashes as well.

I am going insane over something that was supposed to be a quick side project. If u can Help me in any way that would be amazing! I only have a limited budget which is why I didn’t buy the whole setup from one manufacturer which would probably be easier.