nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Albrecht Markus Schellenberger — Tue, 31 Aug 2021 11:14:38 GMT

Hello Kevin,

as discussed on Teams, I am closing this ticket for now and re-open it in case you are able to reproduce the described behaviour.

Regards,

Markus

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Albrecht Markus Schellenberger — Fri, 06 Aug 2021 10:14:42 GMT

Thanks a lot, Kevin!

As discussed on Teams, since I will be on vacation for the next couple of weeks you can upload the files to Jira and tag Jan Tore Guggedal.

Regards,

Markus

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Kevin Kotinkar — Fri, 06 Aug 2021 09:52:49 GMT

Hi Markus,

I figured it out how to redirected the logging and Zephyr console to the RTT backend.
The AT command handler is still on the first COM port, which is also the modem trace port.

I did capture 2 traces (+ application log of failing scenario in NBIOT), one working with CATM, the other one failing the MQTT connect in NBIOT (the modem is registered to NBIOT though). Find the files attached.

The trace files (RAW format) are relatively small, so I am not sure if I did everything correctly. Please advise if something is wrong.

Please let me know if the modem team does find something interesting in the logs (use the CAT M trace to cross compare if you like to).

Thanks and best regards,
Kevin

devzone.nordicsemi.com/.../trace_2D00_2021_2D00_08_2D00_06T09_2D00_16_2D00_18.114Z_5F00_CATM.bin

devzone.nordicsemi.com/.../trace_2D00_2021_2D00_08_2D00_06T09_2D00_28_2D00_10.019Z_5F00_NBIOT.bin

devzone.nordicsemi.com/.../NB_5F00_IOT_5F00_APP_5F00_LOG.txt

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Kevin Kotinkar — Thu, 05 Aug 2021 16:20:12 GMT

Hi Markus,

Sorry, I didn't get to that earlier, but I have just looked at what things I need to do. Currently, everything is prepared for the modem tracing, I am using the asset tracker v1.

However, it seems modem traces are on the first COM port, same as my application log. On the nRF9160 DK, this seems to be UART1 (within Zephyr called UART0?), nRF91 UART2 (within Zephyr called UART1) is disabled on the DK (DTS file states: /* Disable UART1, because it is used by default in TF-M */).

It seems as if I need to flip more than just one switch.
What is the recommended setup, naturally I want to keep my application UART console?

ADDING: Does it not cause issues if the modem trace + application logs & AT command interface are on the same COM port?

BR
Kevin

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Albrecht Markus Schellenberger — Wed, 07 Jul 2021 08:45:29 GMT

Hello again Kevin,

My apologies for the delayed answer. It took me some time double-checking this internally.

TCP is not always supported in NB-IoT networks, and that is generally a known issue in some networks in Germany.

But we might need modem traces here to find the root cause of the issue, as we are not sure what the root cause could be.

I don’t know if this is something you wanna try, but you can follow this guide to do so.

Thanks and regards,

Markus

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Kevin Kotinkar — Mon, 28 Jun 2021 13:42:29 GMT

Hi Markus,

thank you for the error code explanations.

I have to admit that I also had the DK connected to the cloud on NB-IoT once (out of 15 tries maybe). I had my DK running outdoors. However, the XMONITOR and CESQ AT commands usually report fairly good cellular signal parameters, also indoors, thus I thought the cellular coverage is actually not too bad and not the root cause of the issue.

I don't know if there are any tiimeouts for the MQTT connection / cloud connection that I could increase just to see if it works most consistently. Could be the backend of the MNO/MVNO that causes the delays here, resulting in connection issues on TCP, MQTT or another higher layer.

Regarding the actual coverage and as I mentioned previously, iBasis seems to only/or mainly roam on Telefonica/o2 Germany. For those interested, this is the best / latest coverage map of Telefonica Germany that I found:
https://www.o2online.de/netz/

Please let me know if you find out anything further, otherwise feel free to close the case.

BR
Kevin

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Albrecht Markus Schellenberger — Mon, 28 Jun 2021 13:01:41 GMT

Hello Kevin,

Thanks a lot for the logs! The device in Berlin reports a connection reset error, while the device in Munich claims that the host could not be found with the available network interfaces (which might be the same root cause, only in different words).

Considering the national iBasis coverage of NB-IoT in Germany, I’m not really sure how much support we can provide here.

But I’ll check this with our nRF Cloud team and see if they have any solution to your problem.

Regards,

Markus

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Kevin Kotinkar — Fri, 25 Jun 2021 09:28:07 GMT

Hello Markus,

I am attaching two application logs, one taken in Berlin, the other one in Munich. Let me know if you see something interesting. For those 2 logs, I have used the pre-compiled asset tracker application, but I had same results when running my own compiled versions (haven't tested on NCS 1.6.0 though, only used NCS 1.5.0 with Zephyr 2.4.99.

(As said CAT-M works, let me know if a success log of that for cross comparison will be helpful).

Btw, to get DNS working on NB IoT I had to use legacy PCO mode with o2 / Telefonica in Germany (June 2021).

Best regards,
Kevin

devzone.nordicsemi.com/.../nRF9160DK_5F00_asset_5F00_tracker_5F00_NBIOT_5F00_Berlin.log devzone.nordicsemi.com/.../nRF9160DK_5F00_asset_5F00_tracker_5F00_NBIOT_5F00_Munich.log).

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Kevin Kotinkar — Tue, 22 Jun 2021 07:50:10 GMT

Thank you, Markus.

Sure, I will do so soon, but in the next days.

BR
Kevin

RE: nRF9160 DK - Asset Tracker Application - Connect to EMEA nRF Cloud?

Albrecht Markus Schellenberger — Mon, 21 Jun 2021 07:49:49 GMT

Hello Kevin,

I’m not aware of any server/gateway for the nRF Cloud in Europe.

Would you mind sending me an application log that shows the failing connecting to the nRF Cloud on NB-IoT? I might wanna cross-check this with our nRF Cloud team.

Thanks and regards,

Markus