How to unprovision nrf Mesh DK board using the hardware?

[raulp]

Hello, 

I am using nrf52832 with nrf Mesh DK. Is there a way to unprovision the board from the hardware  or command line and not from the app?

Many thanks in advance ,

Rp

[Hung Bui]

Hi Rp, 

In our app when you click remove node, we will send a "Node Reset" 0x8049 message to the client server on the node to reset the node. 

In the nRF52 code you can find the code to handle that message in handle_node_reset(); and node_reset().

If you want to reset a node locally, you can also call node_reset() in your code, either trigger by hardware or command line (if you have an interface).

Note that, this won't tell the provisioner to remove the node itself. I don't think there is a way a node can notify that it's leaving the network. But you can always define your own protocol to do so. 

[raulp]

This is clear. I want to know is there a button on a board which can unprovision the board?And how will I come to know about this?

[Hung Bui]

Hi Raul, 

My mistake, the node_reset() only restart the node (CPU reset) not erasing the provisioning data. 

Provisioning data can be erased using mesh_stack_config_clear()  ( this is what used in handle_node_reset -> apply_reset() ) 
You can refer to button 3 handler in button_event_handler() in light switch server. 

No, power reset won't unconfigure the device. 

[raulp]

Hello , 

I had a look at it but I am not getting how it is related with my question?

My question is simple

"Is there any hardware button on the nrf5832 evaluation board which can un-provision the board" ?

Yes or No.

If Yes , then How?

many thanks in advance !

Rp

[raulp]

and please note consider that I dont have access to source code but only the binaries.

[Hung Bui]

Yes, button 4 (3 in the code in button_event_handler() ).  I'm referring to lightswitch example. 

[BubDev]

Hi Hung,

I am attempting to reset a provisioned node inside the main function. I took your advice and used the code from the light switch server example (as seen below). Whenever this gets called however I am getting a mesh weak error  "app_error_weak.c, 108, Mesh assert at 0x0002BFEE (:0)". I am on the latest SDKs. I figured out that the function causing the error is "mesh_stack_config_clear". Any ideas on why this might be happening or any ideas on another way to reset a provisioned board from the main? 

 if (mesh_stack_is_device_provisioned())
            {
#if MESH_FEATURE_GATT_PROXY_ENABLED
                (void) proxy_stop();
#endif
                mesh_stack_config_clear();
                node_reset();
            }
            else
            {
                __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "The device is unprovisioned. Resetting has no effect.\n");
            }
         

[Hung Bui]

Hi Brad, 

When you see an error, you can use addr2line to translate the address to the line of code for further debugging. Or you can step inside mesh_stack_config_clear() to see what exactly throwing error. 

Have you tested the light switch server example to press button 4 on the board to erase provisioning data ? 

[raulp]

Hello , 

is button#4 correct for unprovisioning the node/Please confirm

Thnx

Rp

[Hung Bui]

Have you looked at the code ? 

[raulp]

thanks it worked !

[Hung Bui]

Great :D