Matter working only on 2.4GHz and not on 5GHz (CON-1424)

[FMistrorigo]

Hi,

While testing my product, I encountered an issue connecting my Matter device to Alexa. Since I also have a Google Home, I tried using that and encountered the following problem:

"Connect your smartphone to your main 2.4GHz network, if available. Most Matter-enabled devices cannot yet connect to a 5GHz network."

My device is onNetwork and receives WiFi credentials from our app. Both Alexa and Google Home are connected to the 5GHz WiFi, and my phone also connects to the 5GHz WiFi. The pairing doesn't work unless I use another router without 5GHz; in this case, it uses 2.4GHz, and everything works fine.

Can you help me understand how to face this issue? Am I forced to change the router settings?

Thanks,
Fabio

[shubhamdp]

@FMistrorigo All our SoC are with 2.4 GHz and can't connect to 5 GHz wifi networks. You will have to use the AP which supports 2.4 GHz network.

Am I forced to change the router settings?

I think, yes. If the AP is dual band, you can create the 2.4 GHz network with the same SSID, and it works. (In our tests this worked seamlessly).

Edit: ESP32-C5 is a dual band 2.4 GHz + 5 GHz SoC. But, it will take some time to hit the mass production.

[FMistrorigo]

Hi @shubhamdp,

The issue may be related to the phone's Wi-Fi 6. Our device (onNetwork) connects to the 2.4 GHz Wi-Fi network using our app. Using Alexa, we can check if she's connected to the 2.4 GHz or 5 GHz Wi-Fi by looking at the settings in the Alexa app. In both cases, if the phone is connected to Wi-Fi 6, the device cannot be found. However, using a different phone that supports only Wi-Fi 5 works perfectly.
Please let me know if you can replicate this issue or if you have a solution.

Thanks,
Fabio

[shubhamdp]

Can you please share below details that would help re-create the issue.

Environment

• ESP-Matter Commit Id:

• ESP-IDF Commit Id:

• SoC (eg: ESP32 or ESP32-C3):

• Phone used:

• Alexa app and its version:

• Echo details and version:

• AP used:

AFAIK, only C5, C6, and C61 SoCs support Wi-Fi 6. But, I'm not sure what that has to do with IP.

Can you please share the device logs as well from bootup.

Also, at what stage this is failing? Are you able to commission the device? or it fails connecting to an AP? (more details on this would be helpful).

[shubhamdp]

@FMistrorigo any update on this?

[dhrishi]

Closing this now