RE: Connection to a WPA2 Wi-Fi router fails

Hi Waldemar,

yes, now there is an idea:

Your device is running kernel 6.18.38, but the official Infineon
release for CYW43455 supports only up to kernel 6.6.23, as far as I can
see here:

https://community.infineon.com/t5/AIROC-Wi-Fi-and-Wi-Fi-Bluetooth/
Cypress-Linux-WiFi-Driver-Release-FMAC-2025-06-30/td-p/1046940

That means you are missing some patches required for proper Wi-Fi
functionality. In particular, WPA3-related patches could cause the issue,
for example:

0056-brcmfmac-support-external-SAE-authentication-in-stat.patch
0067-brcmfmac-Revise-channel-info-for-WPA3-external-SAE.patch
0068-brcmfmac-Fix-structure-size-for-WPA3-external-SAE.patch
0073-brcmfmac-enable-pmk-caching-for-ext-sae-wpa3-ap.patch

Best regards, Sven
> -----Original Message-----
> From: Waldemar Brodkorb <[email protected]>
> Sent: Montag, 17. August 2026 09:19
> To: Dembianny Sven (BSH GDE-EDSD7) <[email protected]>
> Cc: Waldemar Brodkorb <[email protected]>; Michael Nazzareno Trimarchi
> <[email protected]>; François Galea <[email protected]>; [email protected]
> Subject: Re: Connection to a WPA2 Wi-Fi router fails
> 
> Hi Sven,
> 
> Dembianny Sven (BSH GDE-EDSD7) wrote,
> 
> > Hi Waldemar,
> >
> > no idea at the moment, but this looks like a different issue, potentially an initialization-related topic.
> 
> Fair enough. In the meanwhile I switched from Buildroot to OpenADK (my own embedded system
> buildsystem) and with that I can reproduce the original failure. I will investigate the Buildroot error later.
> 
> Attached is the output of wpa_supplicant on the console, when I try to connect to my WPA2 WLAN
> router. wlan0 is the interface.
> 
> Any idea for the original issue?
> 
> The only error I see is:
> Line 0: invalid key_mgmt 'SAE'
> 
> best regards
>  Waldemar