How to re-provision a node to same address with nRF52840 DK board in mesh

[Sash]

i'm using nRF mesh sdk v2.1.1 with 2 boards and 1 provisioner board. I have un-provisioned 1 board with the help of config_client_node_reset().  I want to know the procedure to re-provision the unprovisioned node with same address.Please give me solution.

[Hung Bui]

Hi, 

Mesh spec has no guide regarding this. By the spec, the address of a newly provisioned node should be the increment of the last provisioned node. 

But it should be possible to provision with the previous address. You need to modify the provisioner code to store the database and when you re-provision the unprovisioned node you use the same address. 

[Sash]

<t: 461821>, provisioner_helper.c, 287, Scanning For Unprovisioned Devices
<t: 461857>, main.c, 118, Flash write complete
<t: 532066>, main.c, 702, Button 4 pressed
<t: 532068>, main.c, 716, ----- Node reset -----
<t: 532078>, main.c, 721, ----- Press reset button or power cycle the device -----
<t: 532081>, main.c, 728, Setup start after reset
<t: 532083>, main.c, 731, Waiting for node to be provisioned ...
<t: 532086>, provisioner_helper.c, 287, Scanning For Unprovisioned Devices
<t: 534849>, main.c, 146, Flash remove complete
<t: 535156>, main.c, 460, Config client event
<t: 613530>, provisioner_helper.c, 144, UUID seen: 0059000000000000975B2B98BE9A8FF2
<t: 613533>, provisioner_helper.c, 95, UUID filter matched
<t: 614293>, provisioner_helper.c, 264, Provisioning link established
<t: 693378>, provisioner_helper.c, 259, Static authentication data provided
<t: 704892>, provisioner_helper.c, 192, Provisioning completed received
<t: 704895>, provisioner_helper.c, 197, Adding device address, and device keys
<t: 704898>, provisioner_helper.c, 200, Address: 0x0100
<t: 704900>, provisioner_helper.c, 203, devkey_handle:0
<t: 627593>, app_error_weak.c, 103, Mesh error 15 at 0x00027FF1

(Error in line:\provisioner\src\provisioner_helper.c:203)

It seems device key handle gets 0 if i reset the node and re-provision it.How to solve this problem

[Hung Bui]

When you remove the node (calling config_client_node_reset() ) you can delete the device key in the dsm list on the provisioner by calling dsm_devkey_delete()

[Sash]

ok, what you saying is, i have to call sdm_devkey_delete() after config_client_code_reset() in provisioner main.c but the dsm_devkey)delete() contains handle parameter. dsm_clear() will not delete this devkey?

[Hung Bui]

I'm not sure why you mention dsm_clear() here ?

dsm_clear() is to be called on the provisionee (the node to be removed) not the provisioner. 

[Sash]

ok i understand about dsm_clear() now, should i call dsm_devkey_delete() next to config_client_node_rest() in provisioner main.c

[Hung Bui]

Yes, correct. 

[Sash]

devkey for first provisioned node is not deleted if i use dsm_devkey_delete().

[Hung Bui]

So what happened when you call dsm_devkey_delete() for that handle ? Have you stepped into the code ? 

[Sash]

i have deleted devkey with this function while the provision complete, it has worked.Thank you