RE: Connection to a WPA2 Wi-Fi router fails

Hi Waldemar,

no idea at the moment, but this looks like a different issue, potentially an initialization-related topic.

Best regards,  Sven
> -----Original Message-----
> From: Waldemar Brodkorb <[email protected]>
> Sent: Samstag, 15. August 2026 08:13
> 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,
> 
> but without even the possibility to scan I am not able to reproduce the initial bug anymore. Do you
> have an idea why connmanctl scan wifi fails for me?
> 
> I use Buildroot master (tried arm and aarch64), enable the wifi firmware and connman. After booting
> with the SD card I stop connmand /etc/init.d/S45connman stop modprobe brcmfmac
> /etc/init.d/S45connman start connmanctl enable wifi connmanctl scan wifi
> 
> Error /net/connman/technology/wifi: Not supported
> 
> When I add -d for debug information before I start connmand, I see in the log that wlan0 is recognized:
> Jan  1 00:01:11 buildroot daemon.info connmand[232]: Adding interface eth0 [ ethernet ] Jan  1
> 00:01:11 buildroot daemon.debug connmand[232]: src/technology.c:technology_find() type 2 Jan  1
> 00:01:11 buildroot daemon.debug connmand[232]: src/rtnl.c:rtnl_message() NEWLINK len 1476 type
> 16 flags 0x0002 seq 0 pid 232 Jan  1 00:01:11 buildroot daemon.debug connmand[232]:
> src/ipconfig.c:__connman_ipconfig_newlink() index 3 Jan  1 00:01:11 buildroot daemon.info
> connmand[232]: wlan0 {create} index 3 type 1 <ETHER> Jan  1 00:01:11 buildroot daemon.info
> connmand[232]: wlan0 {update} flags 4098 <DOWN> Jan  1 00:01:11 buildroot daemon.info
> connmand[232]: wlan0 {newlink} index 3 address E4:5F:01:16:5A:26 mtu 1500 Jan  1 00:01:11 buildroot
> daemon.info connmand[232]: wlan0 {newlink} index 3 operstate 2 <DOWN> Jan  1 00:01:11 buildroot
> daemon.debug connmand[232]: src/detect.c:detect_newlink() type 1 index 3 Jan  1 00:01:11 buildroot
> daemon.debug connmand[232]: src/device.c:connman_device_create() node e45f01165a26 type 2 Jan
> 1 00:01:11 buildroot daemon.debug connmand[232]: src/device.c:connman_device_create() device
> 0x5599d3a8f0 Jan  1 00:01:11 buildroot daemon.debug connmand[232]:
> src/device.c:connman_device_set_string() device 0x5599d3a8f0 key Address value E4:5F:01:16:5A:26
> Jan  1 00:01:11 buildroot daemon.debug connmand[232]: src/device.c:connman_device_register()
> device 0x5599d3a8f0 name Wireless Jan  1 00:01:11 buildroot daemon.info connmand[232]: Adding
> interface wlan0 [ wifi ] Jan  1 00:01:11 buildroot daemon.debug connmand[232]:
> src/technology.c:technology_find() type 3
> 
> 
> Any idea?
> 
> best regards
>  Waldemar
> 
> Dembianny Sven (BSH GDE-EDSD7) wrote,
> 
> > Hi Waldemar,
> >
> > yes, that seems reasonable. We need additional information to better understand what is happening.
> > Could you please provide a wpa_supplicant log with debug logging enabled?
> >
> > Best regards, Sven
> > > -----Original Message-----
> > > From: Waldemar Brodkorb <[email protected]>
> > > Sent: Dienstag, 11. August 2026 19:30
> > > To: Dembianny Sven (BSH GDE-EDSD7) <[email protected]>
> > > Cc: Michael Nazzareno Trimarchi <[email protected]>;
> > > François Galea <[email protected]>; [email protected];
> > > [email protected]
> > > Subject: Re: Connection to a WPA2 Wi-Fi router fails
> > >
> > > Hi Sven,
> > > Dembianny Sven (BSH GDE-EDSD7) wrote,
> > >
> > > > Hi Waldemar,
> > > > >
> > > > > Hi Sven,
> > > > > Dembianny Sven (BSH GDE-EDSD7) wrote,
> > > > >
> > > > > > Hi Michael,
> > > > > >
> > > > > > I don't think so, e.g., if AP does not support SAE but repeater does, roaming will fail.
> > > > > > This will also break certification tests.
> > > > > >
> > > > > > @ François do you have more info about your setup, e.g. MFP
> > > > > > setting on AP/wpa_supplicant
> > > > > config/WPA-PSK-SHA256 instead of WPA-PSK?
> > > > >
> > > > > Sorry for the late reply. Francois seems not to answered your
> > > > > question and I see no fixes for this problem in GIT master either.
> > > > >
> > > > > My AP is a standard Vodafone AP with WPA2.
> > > > > How can I give you better information about the details of this AP?
> > > > What model is being used?
> > >
> > > Vodafone Wifi 6.
> > > It is this one:
> > > https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fww
> > > w.vodafone.de%2Fdownload&data=05%7C02%7Csven.dembianny%40bshg.com%7C
> > > 28ff4dffa49c488a7b4e08defa9441af%7C0ae51e1907c84e4bbb6d648ee58410f4%
> > > 7C0%7C0%7C639223711836903590%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGk
> > > iOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjo
> > > yfQ%3D%3D%7C0%7C%7C%7C&sdata=%2BG4XESNZmUWwrlifdv2Xda4fX8gZbVaDGCKfF
> > > 09Bu88%3D&reserved=0
> > > area%2FCGA6444VF-DMS3-CTC-25-
> > > 593_v2.0_German_public_20210511.pdf&data=05%7C02%7Csven.dembianny%40
> > > bshg.com%7C59663c
> > > 7c2d2d49ac217508def7ce2d13%7C0ae51e1907c84e4bbb6d648ee58410f4%7C0%7C
> > > 0%7C63922066219
> > > 4440574%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAu
> > > MDAwMCIsIlAiOiJ
> > > XaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=ycBjQxm
> > > EPcxuLgXBXIMrjCg
> > > OsU9mHQ%2B%2B%2B%2BOcVwvkfTg%3D&reserved=0
> > >
> > > > It is possible that MFP is additionally configured as optional.
> > > > Could you please check the AP settings
> > > or the beacon frames?
> > >
> > > It seems not.
> > > See:
> > > sudo iw dev wlan0 scan | grep -A20 -B2 'Vodafone-C30C'
> > >       last seen: 84 ms ago
> > >       Information elements from Probe Response frame:
> > >       SSID: Vodafone-C30C
> > >       Supported rates: 1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0
> > >       DS Parameter set: channel 11
> > >       Country: DE     Environment: Indoor/Outdoor
> > >               Channels [1 - 13] @ 20 dBm
> > >       TPC report: TX power: 18 dBm
> > >       ERP: Barker_Preamble_Mode
> > >       Extended supported rates: 6.0 9.0 12.0 48.0
> > >       RSN:     * Version: 1
> > >                * Group cipher: CCMP
> > >                * Pairwise ciphers: CCMP
> > >                * Authentication suites: PSK
> > >                * Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
> > >       BSS Load:
> > >                * station count: 2
> > >                * channel utilisation: 31/255
> > >                * available admission capacity: 0 [*32us]
> > >       RM enabled capabilities:
> > >               Capabilities: 0x72 0x00 0x00 0x00 0x00
> > >                       Neighbor Report
> > >                       Beacon Passive Measurement
> > > --
> > >       signal: -72.00 dBm
> > >       last seen: 3208 ms ago
> > >       SSID: Vodafone-C30C
> > >       Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
> > >       TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
> > >       Country: DE     Environment: Indoor/Outdoor
> > >               Channels [36 - 64] @ 23 dBm
> > >               Channels [100 - 140] @ 30 dBm
> > >       Power constraint: 0 dB
> > >       TPC report: TX power: 23 dBm
> > >       RSN:     * Version: 1
> > >                * Group cipher: CCMP
> > >                * Pairwise ciphers: CCMP
> > >                * Authentication suites: PSK
> > >                * Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
> > >       BSS Load:
> > >                * station count: 6
> > >                * channel utilisation: 6/255
> > >                * available admission capacity: 0 [*32us]
> > >       RM enabled capabilities:
> > >               Capabilities: 0x72 0x00 0x00 0x00 0x00
> > >                       Neighbor Report
> > >                       Beacon Passive Measurement
> > >
> > >
> > > > Also, what firmware version is running on the Raspberry Pi 4? The
> > > > firmware files should be located
> > > under:
> > > > /lib/firmware/
> > >
> > > That is the dmesg output after loading the Wifi driver in Buildroot:
> > > [  249.369934] brcmfmac: F1 signature read @0x18000000=0x15264345 [  249.373427] brcmfmac:
> > > brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6 [  249.382449]
> usbcore:
> > > registered new interface driver brcmfmac [  249.618723] brcmfmac:
> > > brcmf_c_process_txcap_blob: no txcap_blob available (err=-2) [
> > > 249.626771] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6
> > > wl0: Aug 29 2023 01:47:08 version 7.45.265 (28bca26 CY) FWID
> > > 01-b677b91b
> > >
> > > But at the moment I am fighting with connmanctl, it seems I cannot scan wifi anymore:
> > > # connmanctl scan wifi
> > > Error /net/connman/technology/wifi: Not supported # connmanctl
> > > enable wifi wifi is already enabled # connmanctl scan wifi Error
> > > /net/connman/technology/wifi: Not supported # connmanctl technologies
> /net/connman/technology/ethernet
> > >   Name = Wired
> > >   Type = ethernet
> > >   Powered = True
> > >   Connected = False
> > >   Tethering = False
> > >   TetheringFreq = 2412
> > > /net/connman/technology/wifi
> > >   Name = WiFi
> > >   Type = wifi
> > >   Powered = True
> > >   Connected = False
> > >   Tethering = False
> > >   TetheringFreq = 2412
> > >
> > > I can scan wifi with iw on the RPI4.
> > >
> > > best regards
> > >  Waldemar
> > >
> >