nRF9151 custom board – GNSS sample fails with “Failed to activate GNSS functional mode”

[Arun538]

Hi Nordic Team,

I have developed a custom board using the nRF9151 controller.
I am testing the GNSS sample from nRF Connect SDK v3.0.0.
When I flash and run the firmware, I see the following output in RTT Viewer:

Hardware Details:

• SoC: nRF9151

• Board: Custom design (based on nRF9151 DK reference)

Software Details:

• nRF Connect SDK: v3.0.0

• Toolchain: nRF Connect for VS Code

• Sample Used: nrf/samples/nrf9160/gnss

• Build target: nrf9151dk_nrf9151



  How can I solve this issue?
  
  
  

Best regards

Arun

[dejans]

Hi,

I have tested unmodified sample on nrf9151-dk and I could not replicate reported error.

Which version of the modem firmware do you use on your custom board?

Sample Used: nrf/samples/nrf9160/gnss

The GNSS sample is located in nrf\samples\cellular\gnss in NCS v3.0.0.

Build target: nrf9151dk_nrf9151

You can try to build the sample for nrf9151dk/nrf9151/ns as specified in GNSS sample documentation.

I have developed a custom board using the nRF9151 controller.

 Does the error come when building for nrf9151-dk or for custom board?

Best regards,
Dejan

[Arun538]

Hi Dejan,

Sorry for the confusion — I’m actually using the nrf/samples/cellular/gnss example from NCS v3.0.0, not nrf/samples/nrf9160/gnss.
The build target I used is nrf9151dk_nrf9151 ns.

There were no errors during build or compilation, and I uploaded the firmware to my custom board using the nRF9151 DK as a programmer.

After uploading, when I open RTT Viewer, I see the following error:

Could you please advise on what might be causing this issue?

Best regards,
Arun

[dejans]

Hi Arun,

Which modem firmware version do you use?

Best regards,
Dejan

[Arun538]

Hi Dejan,

I’m using modem firmware version 1.3.5 along with NCS v3.0.0.

Best regards,
Arun

[dejans]

Hi Arun,

RTT logging is not enabled by default in the project configuration. Have you modified GNSS sample in any way?

Best regards,
Dejan

[Arun538]

Hi Dejan,

Yes, I’ve added the following configurations in the prj.conf file to enable RTT logging:

CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_LOG=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_MODE_IMMEDIATE=y
CONFIG_PRINTK=y
CONFIG_STDOUT_CONSOLE=y

In the main file, I only added

#include <zephyr/sys/printk.h>

Other than that, I haven’t made any modifications to the GNSS sample.

Best regards,
Arun

[dejans]

Hi Arun,

Can you try to remove occurrences of printk (from your code and configuration) and leave only logging enabled? What is the result?

Best regards,
Dejan