nRF52840 secure dfu over thread issue (not working)

[kpyush]

SDK: nRF5 SDK for Thread and Zigbee v1.0.0

nrfutil version : 3.5.1 (also tried with 3.5.0)

pyspinel: 1.0.0a1

board: nrf52840 PDK

gcc version: 5.4.0 20160609

instruction has been followed as per the document in this link

we are using following command: nrfutil settings generate --family NRF52840 --application client\pca10056\blank\armgcc\_build\nrf52840_xxaa.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 settings.hex 

issue: 

1. We not able to run Secure dfu example over thread
2. DFU in multicast mode, DFU server doesn't complete the DFU process . it get stuck on last 2 byte data (command used: nrfutil dfu thread -f -pkg app_dfu_package.zip -p COM3 --channel 11 --panid 43981 -r 4 -rs 5000 -a FF03::1)
3. DFU Server in multicast mode always sends the data even if no DFU client is available
4. DFU client throws the DFU_DOWNLOAD_TRIGGER event = DFU_EVENT_TRANSFER_ERROR (RTT log)
5. The error mentioned above throws even if there is no DFU server available. After three retries it throws no more retries message and stops

[by1e11]

Hi Peeyush

Happy new year!

Has this problem been resolved? I have encountered the same issue as you stated. Could you please share some idea with me if you have resolved the issue.

Thanks a lot

Best wishes

Bo

[by1e11]

BTW, I am using the sdk for thread 2.0.0 and the latest nrfutil (4.0.0) and pca10056 board

[kpyush]

NrfUtil 4.0.0 is still having some problem as we have encountered in the past it was not reliable. Eventually we switched to our own implementation of the DFU server over thread protocol.

[by1e11]

Thanks for the reply.

Have you made any progress on the DFU server? If it really works, perhaps we will have to implement a DFU server as well.

Thanks

Best wishes

Bo

[kpyush]

yes we did our own propitiatory implementation.