Issue with 5G WiFi AP Detection Using ATWS Command

Technical Discussion
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1

[ same issue with this close topic: RTL8722DM scan WiFi issue for 5Ghz ]

Dear Dakamaster,

We are experiencing the same issue where issuing the ATWS command does not detect any 5G WiFi APs—only 2.4G WiFi APs are found.

Platform Details:
Board: AMB23

SDK: ambd_sdk-1.0.1

Steps to Reproduce:
Updated the default km0/km4 firmware to v1.0.1

Issued the ATWS command

Only 2.4G WiFi APs were detected—no 5G APs appeared

Could you provide any insights or recommendations to resolve this issue?

Best regards,
Chinfu

AMB23
AMB23720×540 89.4 KB

Capture
Capture720×682 96.6 KB

2

Hi @Vic , can you check whether both 2.4 and 5G network name is different? You may try to set into different AP names for both and test again. Thank you.

3

Dear KaiFai,

Thanks for the information!

I tried the “ATWS” command again today and found that the issue seems to be related to the board itself, although I’m not sure why. I haven’t made any hardware changes to these SDK boards. Could it be a configuration issue with the NAND flash? I may have erased the entire flash at some point.

Here’s what I observed:

  1. I tested with two AMB23 boards.
  2. Issued the “ATWS” command.
  3. One board, which appears to be “weaker,” can only scan and return a few 2.4GHz APs.
  4. The other board successfully detects both 2.4GHz and 5GHz APs and lists significantly more access points.
  5. BTW, the “RTAC51U” is just next to the boards.

Do you have any idea what might be causing this discrepancy?

Best regards,
Vic

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log:

amb23_log
amb23_log1920×1050 97 KB

amb23:
amb23
amb23887×1182 293 KB

4

hi @Vic, may you test it on Arduino SDK to confirm whether it can detect 5GHz AP using this Arduino example.

If the outcome is the same where one board apparently to be working it might be hardware issues on the weaker board. Thank you.