LPN EXAMPLE SDK FOR MESH: Mesh error 4 at 0x00000000 (:0)

[S98VN]

When i enable BLE_DFU_SUPPORT_ENABLED 1 and debug i have problem Mesh error 4 at 0x00000000 (:0).
I'm using sdk: 17.0.2, sdk_for_mesh: 5.0.0. Board nRF52840 DK.
Thanks you for support.

[Hung Bui]

Hi Sơn, 

As the log may suggest, have you flashed the BLE bootloader ? 
You would need to flash the BLE bootloader as instructed here. 

[S98VN]

Hi Hung,
I don't know step 4 "merge the bootloader HEX file and the bootloader settings HEX file". where can i find or how to generate bootloader settings Hex file.
Thanks you for reply me.

[Hung Bui]

Hi Son, 

It's described at step 1.e in the same page , you need to use nrfutil to generate bootloader setting. https://infocenter.nordicsemi.com/topic/ug_nrfutil/UG/nrfutil/nrfutil_settings_generate_display.html?cp=10_7_6

However, you don't need to generate bootloader setting if you simply want to test the bootloader. I would suggest to follow my blog here on how to test the bootloader and get familiar with the bootloader before you testing it with the LPN mesh. 

[S98VN]

Thanks you so much. I will follow your blog. So I have a question. In example Light_Switch, other than sending the onoff message, can i send another message, for example "hello"?

[Hung Bui]

Hi Son, 
Yes, but you would need to define your own model. Have a look at the simple_on_off model. You need to define your own payload data , to add a byte array there. 

[S98VN]

Hi Hùng,
To use simple_on_off, i just need to change function "models_init_cb", "mesh_init" in main.c, right? And which funcion will send my message? I see uint32_t simple_on_off_client_set(simple_on_off_client_t * p_client, bool on_off), it send bool message but not send string message.