Failed to do DFU

[Richard Yin]

Hi, All,

We developed our device with KEIL 5, SDK15.2 and SoftDevice 6.1.1. Android App was developed on Android Nordic DFU 1.8.1 library.

When we try to upgrage the firmware of our device,
the App often halt with the error message "Starting DFU..." or "Starting bootloader..." on master control panel as the attached images.

Do you have any ideas about this problem?

Thanks and regards!

[Einar Thorsrud]

Hi,

Do you only get problems when using your own application as DFU master, or do you also get the same problem using for instance nRF Connect? If so, can you upload the log? It would also be interesting if you have some logs form the nRF side that could show what is going on.

[Richard Yin]

Dear Einar,

nRF connect(Android) sometime also failed to do DFU, but it is much more reliable than our App.

BTW, could you please possibly show us same part of your nRF connect source code, specially the code
and logic of around DFU APIs in nRF connect such as:
1) how to prepare before to do DFU,
2) how to handle the abnormal state during DFU and
3) how to enable CCCD in code

Thanks and Regards,

Richard

[Einar Thorsrud]

Hi Richard,

The nRF Connect code is not available, but you can refer to the Android-nRF-Toolbox code, which also use the DFU library.

[Richard Yin]

Hi Einar,

Appreciate you reply, thank you!

After DFU APIs called, we could get many different error code from these APIs, but sometimes,
we couldn't understand the exact meaning of these error code.

Do you have the ditailed definitions or explanations for these error code? It will be very helpful
for us to find out the DFU failure reason and figure out the solution.

Best regards,
Richard

[Einar Thorsrud]

Hi Richard,

There is no other documentation for the Android DFU library than what you find in the GitHub repo. To which error codes are you referring? If it is errors communicated by the nRF (DFU target), then it is documented in the DFU protocol documentation.

Br,

Einar