Can't provision nRF52840 dev kit when running Mesh Light example

[ZacMid007]

I'm learning to work with the nRF52840 chip, and ordered the development kit for testing. It arrived today; I flashed the Blinky example and it worked fine, flashed the Light application (nrf/samples/bluetooth/mesh/light) and it seemed to work; I opened the nRF Mesh app on Android (latest version) and could see the board, I tapped Identify and all the lights start flashing, hit Provision and it gave me the option for no OOB, pushing the button or inputting the number of LED flashes, but then it wouldn't get any further once I had verified OOB (or selected "No OOB").

The last line I would see in the app is "Sending Provisioning Data", then it would exit the provisioning screen and return to the Scanner for adding nodes, where I would see the same node I just attempted to provision. I tried all available OOB options, none of which made a difference (although all seemed to work correctly).

I haven't touched the application, I re-added the example from scratch to make sure. SDK v2.2.0, I'm working in Visual Studio Code.

[Elfving]

Hello Isaac,

So you do not see a  Pop-up saying "configuration complete". Instead you go straight to the Scanner menu. Is this something you could've repeated indefinitely?

Could you try manually erasing the flash before flashing the sample and see if that makes any difference? You can for instance run "nrfjprog --recover".

Are you seeing the same issue with another mesh samples?

Regards,

Elfving

[ZacMid007]

Correct, there is no pop-up, it goes straight from "Sending provisioning data" to the Scanner menu. It repeats indefinitely as far as I can tell, I tried it a lot. Tried erasing/recovering and reprogramming, no difference. Potentially of note, the time it takes to go to the Scanner menu is not consistent, sometimes it's instant and sometimes it takes a couple of seconds.

I tried the Mesh Light Switch example as well, and while it did provision, I would get this error:

 

Any attempt to eg add an app key or get composition data after this would result in an immediate disconnection

Tried Mesh Chat example as well, same result as Light Switch. Going back to the Mesh Light example after trying the Switch and Chat examples did not change anything, it still failed to provision at all

[Elfving]

That is interesting.

Could you try reinstalling your SDK, or trying another version eg. 2.1? And if you are running a VPN when downloading the SDK, could you try turning it off?

Regards,

Elfving

[ZacMid007]

I reinstalled the SDK, changing from 2.2.0 to 2.3.0-rc1, and reinstalled/updated the VSCode extensions - no change, still crashed (I also deleted and re-created the example from the new SDK install):

[ZacMid007]

Tried again with 2.3.0, no change

[ZacMid007]

Breakthrough - every time I was making a build configuration, I had been checking "enable debug options". I tried leaving it unchecked and it seems to be working now

[Elfving]

Ah right, I don't usually enable that unless I have to. So unfortunately I don't even think about asking if other people do. But I tried to enable it just now, and I am actually seeing the same issue you are. So just to test a Mesh sample, you don't need to enable it.

If you do want to enable it to though, you would have to increase the stack size (which is what its complaining about). You can do this by changing the prj.conf file of the project.

Change CONFIG_BT_RX_STACK_SIZE = 4096

And add CONFIG_MAIN_STACK_SIZE=4096

Regards,

Elfving