Bluetooth Mesh Provisioner Reset

[Doug K]

Hello,

I am using Bluetooth mesh for a project. I have a central device acting as a provisioner, and node devices that get provisioned as normal through this device.

I am trying to setup a button to perform a factory reset on the provisioner. The issue I get is that after performing a factory reset, the next newly provisioned node has issues communicating IF IT USES THE SAME NODE ADDRESS THAT WAS USED PREVIOUSLY. For example, If I had a node on address 2, do a factory reset, then the new address 2 node will not work. Something is being retained and I'm not sure what. 

Here is how I'm doing the "Factory Reset" 

    /* Clear the Configuration Databasefor provisioner */
    bt_mesh_cdb_clear();

    /* Reset the mesh node state */
    bt_mesh_reset();

    k_msleep(4000);

    sys_reboot(SYS_REBOOT_COLD);

I have also tried wiping the Settings but that doesn't seem to be fixing it either. 

[Susheel Nuguru]

On provisioner, you must not reuse a unicast address while another device still has valid credentials for it. It looks like there are clearly many things persistently stored, best is make sure to delete the subtree and CDB and recreate the cdb before provisioning again. 

bt_mesh_cdb_clear();

settings_delete("bt/mesh");
bt_mesh_settings_store_pending(); /* force immediate write if enabled */
k_msleep(3000); 

sys_reboot(SYS_REBOOT_COLD);

[Doug K]

It turned out I just needed to wait a little bit longer before rebooting. Apparently, the Settings takes a bit of time to save/delete. A 2 second delay was not long enough.

For nodes:

bt_mesh_reset();

k_msleep(4000);

sys_reboot(SYS_REBOOT_COLD);

As for the provisioner, it is the same but with bt_mesh_cdb_clear();