CC3351: Connection to WPA3-SAE wifi with MCU SDK R7.2

Gaétan Froissard

Prodigy 40 points

Part Number: CC3351

Tool/software:

Hello,

Currently I am able to connect to open/wpa/wpa2 wifi network but not to WPA3-SAE using Zephyr RTOS and CC3351.

Here is the configuration of the Access Point (TP-Link):

I have ran a "wpa_cli status" from my laptop to get more parameters:

Selected interface 'wlp0s20f3'
bssid=b0:19:21:ef:d4:8e
freq=5240
ssid=TP-Link_D48F
id=0
mode=station
wifi_generation=5
pairwise_cipher=CCMP
group_cipher=CCMP
key_mgmt=SAE
pmf=2
mgmt_group_cipher=BIP
sae_group=19
sae_h2e=0
sae_pk=0
wpa_state=COMPLETED
ip_address=192.168.1.100
p2p_device_address=9c:b1:50:d2:13:de
address=9c:b1:50:d2:13:dd
uuid=36704033-f281-5dd3-bfa6-7d50a49d72fa
ieee80211ac=1

On the MCU side, I request the connection by calling Wlan_Connect with the security type of WLAN_SEC_TYPE_WPA3.

I've got no error on this call and I receive no event from the CC3351 (connecting, connected nor error).

From the CC3351 logs (attached to this ticket) I've found the following logs:

2,,2025-09-30 14:21:41.436,0,0,sme.c:873,1,**UNKNOWN_FUNC for lr 0x000996b1(),SME: Trying to authenticate with b0:19:21:ef:d4:8f (SSID='TP-Link_D48F' freq=2462 MHz),8100400000b196090000100000b01921efd48f0c54502d4c696e6b5f443438469e09
...
1,,2025-09-30 14:21:41.437,0,0,drv_ti_sta_specific.c:158,1,**UNKNOWN_FUNC for lr 0x000a394f(),"ti_driver_authenticate: SAE auth commit, auth_data_len = 102",80004f390a0066
...
2,,2025-09-30 14:21:41.520,0,0,drv_ti_sta_specific.c:916,1,**UNKNOWN_FUNC for lr 0x000c0d81(),Sending auth request packet to b0:19:21:ef:d4:8f (auth type AUTH_ALG_TYPE_SAE # tries 1),8100000000810d0c00010000001162303a31393a32313a65663a64343a38660301
...
2,,2025-09-30 14:21:41.521,0,0,sme.c:1364,1,**UNKNOWN_FUNC for lr 0x000a01b7(),CTRL-EVENT-AUTH-REJECT b0:19:21:ef:d4:8f auth_type=3 auth_transaction=1 status_code=1,8100000000b7010a0000000000b01921efd48f030101

I see an error in CC3351 logs but I don't receive this error through the event handler on host side (I don't receive any event in that case such a WLAN_EVENT_ERROR).

Do you have any idea what is the meaning of this error on CC3351 ? And why I don't receive those errors on MCU side ?

WPA3_SAE.csv

Thanks,

Gaétan

8 hours ago