LTE Modem log configuration

[Yann.P]

Hi there,
I need to collect modem logs to investigate LTE-M connectivity issues in specific countries.
I have been using the command AT%XMODEMTRACE=1,2 to activate them and I am using Wireshark to visualize them.

I am limited in the amount of data I am able to collect and I would like to reduce the verbosity of the logs to the following subset : AT, NAS-EPS, LTE RRC, IP (actually I would need to only collect the traces that can be viewed with Wireshark).

The documentation about the AT%XMODEMTRACE command advises to connect with the support team in order to use the <bitmap_id> and <bitmap> fields and there is no documentation about these fields.

Can you advise me what parameters I should use to limit to the logs to the subset mentioned above ?

Thanks a lot,

Yann

[helsing]

Hello Yann,

I am looking into this and will get back to you next week.

Best regards,

Håkon

[Yann.P]

Thanks a lot, I am look forward to your response.

[helsing]

Hello Yann, sorry for the delay.

<bitmap_id> and <bitmap> fields

Sorry, there is no documentation available on these. Sometimes, the modem team might ask customers to use a specific bitmap to get some extra traces.

Have you tried set 5, as in  %XMODEMTRACE=1,5 ? This might be closer to what you are looking for. Does it provide you the information you are seeking?

[Yann.P]

Thank you very much for your answer.

As I have no coredump and as I am not using GNSS, %XMODEMTRACE=1,5 and %XMODEMTRACE=1,2 give me the same amount of data which is very large (1.5MB for 5 minutes of operation) but when I export the collected trace to pcapng format using nrfutil trace lte the results is only a few kB.

Could you forward my question to the modem team that can advise on the use of <bitmap_id> and <bitmap> fields to configure which data is collected ? If would be very helpful for me to be able to reduce the amont of collected traces.

Thank you for your help

Yannick

[Yann.P]

Hello Helsing,
Did you get the opportunity to have a feedback from the modem team on how the use of the <bitmap_id> and <bitmap> fields ?
Thanks a lot,
Yannick