BLE Mesh DFU Issue with dfu_no_serial Example

[bivay]

When I use dfu_nrf52832_xxAA_s132_6.1.1.hex, it works all devices updated with blink code as described in dfu_quick_start.md
But without any provisioning Process, why?

And in 3 out of 5 devices I upload dfu_no_serial_nrf52832_xxAA_s132_6.1.1.hex generated file, and in other 2 uploads dfu_nrf52832_xxAA_s132_6.1.1.hex.
And all the other steps are same  as explained in dfu_quick_start.md
In DFU process 2 devices with dfu_nrf52832_xxAA_s132_6.1.1.hex code is uploaded and blinky started, but not in other 3 devices, which means that they are not updated.

I want to implement dfu in my code, but little confused about how, from above two, as it seems that I have to use dfu_nrf52832_xxAA_s132_6.1.1.hex source not  dfu_no_serial_nrf52832_xxAA_s132_6.1.1.hex source. for DFU.

Please Help me regarding it.

Thank You
Bivay

[Hung Bui]

Hi Bivay,

By theory they should all works, both the one with dfu_nrf52832_xxAA_s132_6.1.1.hex and the one with dfu_no_serial_nrf52832_xxAA_s132_6.1.1.hex. 

I'm not sure what would go wrong here. Could you try to compile the file from the code, instead of using the precompiled hex file ? 

The reason why you can do DFU without doing provisioning is that our Mesh DFU using broadcast mesh instead of Bluetooth mesh to do DFU. In broadcast mesh there is no encryption and no provisioning needed. 

If you want to implement DFU in your application, please have a look at the dfu example. It's pretty simple, just include the DFU file and include a mesh event handler as in the dfu example (mesh_evt_handler) .

[bivay]

Please correct me if I am wrong,

DFU with Serial and DFU without Serial, differences between these two are DFU with Serial can take Firmware update command from Serial interference, and DFU without Serial can't.

I also tried complying from source code, but result is same.

[Hung Bui]

It's correct, as you can see in the code, the main difference is just the initialization of the serial interface. Could you take the log of the non-serial node when doing DFU ? 
Please make sure the application firmware ID in the device page of all nodes are the same. In addition the application version of the current firmware should be smaller than the application version of the new firmware. Check the fw_updated_event_is_for_me() and see if it returns true. 

[bivay]

Ok, I will go to take log and check function  fw_updated_event_is_for_me()  of it.

Firmware ID is same & Application version is greater than installed in all.

Thank You

Bivay

[bivay]

Issue Solved by resetting all module before upload code.
Thank You
Bivay