Thread CoAP Observe not configuring properly.

RE: Thread CoAP Observe not configuring properly.

Mary — Tue, 15 Nov 2022 20:42:57 GMT

I found the answer myself. The CoAP CLI implements the Observe option. For an implementation guideline, look at

<SDK>/modules/lib/openthread/src/cli/cli_coap.cpp

RE: Thread CoAP Observe not configuring properly.

Mary — Wed, 09 Nov 2022 20:01:08 GMT

What do you need to do on the server side to make a resource observable?

How do you update the resource?

Thanks

RE: Thread CoAP Observe not configuring properly.

Sigurd Hellesvik — Fri, 26 Aug 2022 06:43:59 GMT

Hi,

What you have found is indeed a bug. Our developers inform me that it has been fixed in OpenThread upstream by https://github.com/openthread/openthread/pull/7979/files.

This will hopefully be included in our next version of the nRF Connect SDK, but for now you will have to use your workaround for the Observe functionality.

Thank you for reporting this!

Regards,
Sigurd Hellesvik

RE: Thread CoAP Observe not configuring properly.

wkpolara — Thu, 25 Aug 2022 13:34:38 GMT

Sigurd,

Thank you very much for following up on this promptly. Hopefully a resolution can be found, and I look forward to hearing your Thread developers response.

RE: Thread CoAP Observe not configuring properly.

Sigurd Hellesvik — Thu, 25 Aug 2022 11:11:31 GMT

Hi,

I have been able to reproduce your issue.
To figure this out, I have queried our Thread developers.

I will let you know when I know more about this.

Regards,
Sigurd Hellesvik

RE: Thread CoAP Observe not configuring properly.

wkpolara — Tue, 23 Aug 2022 14:58:16 GMT

We are using VS Code. I checked the Kconfig for the configuration. It appears that both the OBSERVE configuration and its dependencies are set:

I also checked the \build\zephyr\.config file and verified that all 3 were set to 'y'. (Attaching as 'dotconfig.txt')

I checked the build log, \build\.ninja_log, and didn't find anything related to "observe" (Attaching as 'dotninja_log.txt')

This is still a mystery why the OpenThread CoAP library #define for Observe isn't getting set during the build...

Are you able to configure a build of one of the OT CoAP samples so OPENTHREAD_CONFIG_COAP_OBSERVE_API_ENABLE is set?

devzone.nordicsemi.com/.../dotconfig.txt

devzone.nordicsemi.com/.../dotninja_5F00_log.txt

RE: Thread CoAP Observe not configuring properly.

Sigurd Hellesvik — Tue, 23 Aug 2022 11:03:06 GMT

Hi,

I recommend using the Insert->Code functionality. It will make it a lot easier to read your questions.

[quote user=""]It appears that either CONFIG_OPENTHREAD_COAP_OBSERVE=y is insufficient, or something else overrides it...[/quote]

Lets start to check if something overrides this.
If a Kconfig option is overridden, it is usually a warning about it in the build log. Can you see any such warning?

Do you use VS Code?
If so, you can use the Kconfig action and search for OPENTHREAD_COAP_OBSERVE to see what this configuration is set to in the finished build.
Here you can also see which options the Kconfigs are dependent on, which is useful.

Regards,
Sigurd Hellesvik