nRF5340-DK and Bluetooth mesh chat example.

[bert svensson]

why doesn't the mesh chat example work on nrf5340?

I know it's not included in the list of supported platforms, but I'm trying to figure out why.

I can compile and upload the project to a nRF52840-DK and it works just fine, but trying to do the same with a nRF5340-DK gives error code -134 on the bt_mesh_init() function, why?

[Hung Bui]

Hi Bert,

Have you flashed the NRF53 netcore with the Zephyr BLE controller ? 
Note that unlike other BLE application, the mesh application requires you to use Zephyr BLE controller instead of Nordic's Softdevice controller. Please have a look here.
You would need to use  CONFIG_BT_LL_SW_SPLIT = y in prj.conf in the hci_rpmsg project and reflash the netcore (and then app core with the meshchat code). 

[bert svensson]

config_bt_ll_sw_split is already set in the example, see: (line 23)

https://github.com/nrfconnect/sdk-nrf/blob/master/samples/bluetooth/mesh/chat/prj.conf

The network core is flashed, other examples work, both BLE and mesh, just not the chat example.

Also, bt_enable() works just fine, it is just the mesh part ( bt_mesh_init(...) ) that wont initialize in that particular example.

[Hung Bui]

Hi Bert, 
I couldn't reproduce the issue here. 
Could you please try to compile the hci_rpmsg separately (make sure you changed CONFIG_BT_LL_SW_SPLIT = y for this project) and flash the netcore, and app core again ? 

[bert svensson]

Ah, set CONFIG_BT_LL_SW_SPLIT in the network core, now I get it.

I managed to solve the problem by doing as you said and then flash the device with the nRF connect programmer, but when I flashed the device from the terminal using "west flash", then the chat project replaced the network core with it's own version, without the CONFIG_BT_LL_SW_SPLIT parameter set, even when it was correctly set in the chat example project.