Cell ID and LAC are invalid values - but close

RE: Cell ID and LAC are invalid values - but close

user111786 — Thu, 16 Jun 2022 08:04:43 GMT

Hi Damien,

In order to investigate the issue, please send us modem log when you have time.

Best regards,
Dejan

RE: Cell ID and LAC are invalid values - but close

user109228 — Wed, 15 Jun 2022 15:29:22 GMT

Hi Dejan,

Still haven't had time to do a trace. I will try and do that by the end of the week.

However, I have noticed something odd. If I connect to an LTE-M Network it correct gives me the CellId and LAC, but on NB-IoT it does not. My code does not change depending on what network it's on so I can't see how this would be a parsing issue. Potentially an issue on the cell tower itself or in the modem firmware I would guess, but seems strange I am the only one who has noticed it.

Thanks,

Damien

RE: Cell ID and LAC are invalid values - but close

user111786 — Tue, 07 Jun 2022 09:29:11 GMT

Hi,

[quote user="DamoL"]Can you not verify that a Cell-ID that your DK connects to is a correct Cell-ID? You can use one of the two links to search for the Cell-ID you receive and see if they exist?[/quote]

I am sorry, but we really need a trace because we need to check whether this is modem issue or not.. You can enable modem tracing by using CONFIG_NRF_MODEM_LIB_TRACE_ENABLED KConfig option which enables modem traces in the modem and forwards them to the Modem trace module.

Best regards,
Dejan

RE: Cell ID and LAC are invalid values - but close

user109228 — Tue, 07 Jun 2022 08:49:38 GMT

Hi Dejan,

No I can't, it's a custom board, and the app won't run on the DK. I have gone through a lot of trouble to make sure the UARTs are disabled and not wasting power. I've got a tight deadline so I don't really have the time to change a load of code for the sake of a trace.

Can you not verify that a Cell-ID that your DK connects to is a correct Cell-ID? You can use one of the two links to search for the Cell-ID you receive and see if they exist?

Thanks,

Damien

RE: Cell ID and LAC are invalid values - but close

user111786 — Tue, 07 Jun 2022 07:31:20 GMT

Hi Damien,

Could you please run again with Modem Trace enabled and send us trace file?

Best regards,
Dejan

RE: Cell ID and LAC are invalid values - but close

user109228 — Mon, 06 Jun 2022 11:10:53 GMT

Hi Dejan,

Any update on this? If not any idea when there might be some news?

Thanks,
Damien

RE: Cell ID and LAC are invalid values - but close

user111786 — Fri, 20 May 2022 14:06:09 GMT

Hi Damien,

I have reported the issue internally. I'll get back to you when I get new information about this issue.

Best regards,
Dejan

RE: Cell ID and LAC are invalid values - but close

user109228 — Fri, 20 May 2022 13:29:41 GMT

Hi Dejan,

It is a custom board with Modem FW 1.3.1 - I believe that is the latest.

Thanks,

Damien

RE: Cell ID and LAC are invalid values - but close

user111786 — Fri, 20 May 2022 13:20:43 GMT

Hi,

Are you using nRF9160-DK or a custom board?

Which modem firmware version are you using?

Best regards,
Dejan