Hi There,
I bought a new HA Green recently, I am trying to integrate matter(over wifi) devices in my HA but since my 2.4 GHz is in gust network, the UI is not accessible and matter device are not getting discovered.
I use Google nest wifi pro as my router but unable to change 2.4Ghz as non guest network. can someone help me here?
Hi,
The HA Green only has a wired 1Gbps network, so you must be using a mix of wired and WLAN devices with your Google Nest WLAN APs.
Guest WLAN networks typically have “client isolation” so device 1 can not talk to device 2 for security - devices can ONLY connect to the external Internet.
Matter and most HA protocols rely on broadcast - which is likely blocked by client isolation.
I suggest you contact Google support for help to change your network, or move your HA devices to a “normal” WLAN SSID.
The Nest Wifi Pro does support Matter, but that will be as a Thread Border Router (Thread radio → Matter → Ethernet network → LAN + Internet) - and likely useless on a Guest network.
If this helps, 
this post!