nRF Module Kconfig override using Application Kconfig

[rajeev]

Hello nRF community,

I am currently testing some Memfault application that comes with the nRF SDK v1.7.0. I have a custom board designed around the nRF9160 and have been able to run the memfault sample application. However, I was only able to do this by modifying some of the Memfault module Kconfig files. For instance,

ncs/v1.7.0/nrf/modules/memfault/Kconfig

and modifying the above Kconfig by adding my board type similarly in other places.

config MEMFAULT_NCS_HW_VERSION
	string "Hardware version"
	default "nrf9160dk" if BOARD_NRF9160DK_NRF9160_NS
	default "thingy91" if BOARD_THINGY91_NRF9160_NS
	default "stratus" if BOARD_CONEXIO_STRATUS_NS
	help
	  Device hardware version

So my question is, instead of directly modifying the module Kconfig files, is there a way I can do this from my application Kconfig that will override the module configurations and will be local to my application only?

This way I do not have to touch any system files and just configure from Zephyr application layer.

Thanks and any suggestions or code snippets will be really helpful.

[rajeev]

Hi Elfving,

Any updates on this? Thanks and awaiting suggestions. 

[Elfving]

Hey Rajeev! So sorry about the delay!

Have you tried using the configuration CONFIG_MEMFAULT_NCS_HW_VERSION?

Best regards,

Elfving

[rajeev]

I am able to run the Memfault application on my custom board but my issue is that I had to modify the Kconfig files in the NCS which to me is not the optimal way. I was wondering if the Kconfig parameters that are in the Memfault modules directory can be overwritten by including the KConfig file in the application layer and making changes to that.

The above code snipped was just an example of one of these parameters that I had to change. There are a few more that I had to change as well.

Hope I am making sense. 
Thanks

[Elfving]

Hey again,

I think that you should be able to configure all that you want in configuration files of the application itself. The only differences between Memfault and other applications is that there are some additional configurations defined by the Memfault SDK, and that some configurations need to be added in the memfault_platform_config.h file. For more info on this see the section on configuration in the documentation for Memfault, or the 9160 Memfault example.

Did any of the configurations not work besides when you edit the Memfault module?

Best regards,

Elfving

[rajeev]

Hi there,

I have now managed to override the configs vai the prj.conf. Thanks