Adding ble mesh to current application

[tomharrah]

We are trying to add ble mesh functionality to our current product, but encountering an error.

We are copying code from the ..\v3.0.1\zephyr\samples\bluetooth\mesh_demo.   Currently we are just hard coding keys, but will have a way to securely set keys independent of bluetooth.   

The app seems to provision OK because in the bt_ready() callback the call to {err = bt_mesh_provision(net_key, net_idx, flags, iv_index, addr, dev_key); } returns no error.

But then in configure() call the call to {rc = bt_mesh_cfg_cli_app_key_add(net_idx, addr, net_idx, app_idx, app_key, NULL); } returns -22 (Invalid argument?)

The arguments we use are net_idx = 0, addr = 0x000F,  app_idx = 0, and the app_key is a constant 16 byte array with our network key.

It appears to us that the internal static struct bt_mesh_cfg_cli *cli; is never initialized?   When we print out the cli->model->keys_cnt it is usually a large value, like 3136.

Any ideas on how we can fix this error?

Thanks!

[Hieu]

Hi tomharrah,

The nRF Connect SDK contains the Zephyr RTOS and the samples that come with it. The sample you are using, Mesh Demo, is one such sample. However, for Bluetooth Mesh, we do not support any of the Mesh samples in Zephyr.

The particular sample you are referring to is meant to be used for demonstration only, not for production.

We acknowledge that this should have been highlighted better and are working on a way to fix that. Our apologies for the inconvenience.

Regarding adding Mesh to your project, we would like to recommend these resources instead:

• Samples under nrf/samples/bluetooth/mesh, with documentation at Bluetooth Mesh samples.
• Walkthrough Bluetooth Mesh 1.1 and Bluetooth Networked Lighting Control (NLC) - nordicsemi.com

Hieu