NRF700X wifi beacon scrambler seed

[JasonJ]

Hi, I am having issues with one of our wifi scanning modules not detecting the wifi beacon using the 1M rate. Looking into the PHY level, I demodulated different wifi beacons and only the NRF700X had a different scrambled preamble. It seems the NRF700X isn't using the specified scrambler seed according to this section of the wifi spec.

Can you confirm?

Is this something that can be fixed with a software update?

Regards,

Jason

[Charlie]

Hi Jason,

Raised the upstream PR and here are the details:

   nrfxlib : nrf_wifi: Update RPU patch to rev#682070c3fec by karun2796 · Pull Request #1632 · nrfconnect/sdk-nrfxlib

   nrf_wifi : nrf_wifi : Update Wi-Fi FW blobs by karun2796 · Pull Request #19 · zephyrproject-rtos/nrf_wifi

   zephyr : manifest: Update nrf_wifi for DSSS scrabler encoded as per IEEE spec by karun2796 · Pull Request #83896 · zephyrproject-rtos/zephyr

Note that fixes are in bin files and will not be useful for NCS 2.8.0.

We are pareparing a patch on top 2.8.0 branch and will share with you soon.

Best regards,

Charlie

[JasonJ]

Hi Charlie,

This has resolved the issue. Thank you. I tested the 'offloaded raw tx' bin file (replaced the bin file and updated the rpu patch number in NCS 2.8.0).

Are these bin files also compatible with the wifi driver in NCS 2.9.0?

[Elfving]

Hi, Charlie is currently OOO, so I will take over the case in the meantime.

Here are the new bin files Charlie referred to. They are for NCS 2.8.

5008.ncs.zip

Note that the fixes are in binaries and must be replaced in the codebase. Please overwrite the folder nrfxlib/nrf_wifi/bin/ncs with the attached folder.

Regards,

Elfving

[Elfving]

JasonJ said:

Are these bin files also compatible with the wifi driver in NCS 2.9.0?

The ones I sent you are not, though this one is.

ncs_2.9.zip

Regards,

Elfving