Failed to do DFU

RE: Failed to do DFU

Einar Thorsrud — Fri, 18 Jan 2019 11:56:08 GMT

Hi Richard,

the Failed.txt log seems OK up to the point where there are no more logs. There is nothing there indicating that anything went wrong, other than that the next expected log message is missing (that the target device disconnected with status 8, which is timeout). Have you been able to add some logging on the nRF side so that we can see what is happening there? What caused it to not enter the bootloader?

RE: Failed to do DFU

Richard Yin — Thu, 17 Jan 2019 07:32:43 GMT

Dear Einar,

We saved the the DFU library internal logs into file. I attached 2 log files: 'Failed.txt' is the log file for a failed DFU and 'Succeed.txt' is the log file of a succeeded DFU. For the most of our failure of DFU, android app threw a error at line 137 in the ButtonlessDfuImpl.java of DFU library, as the attched the picture: ExceptionPlace.png.

Could you please have a analysis based on these information at first and the further information will be provided as soon as we get.

Best Regards,
Richard

devzone.nordicsemi.com/.../Failed.txt devzone.nordicsemi.com/.../Succeed.txt

RE: Failed to do DFU

Einar Thorsrud — Wed, 16 Jan 2019 08:41:23 GMT

Hi Richard,

What state is the nRF in during this test? Is the nRF still in the application, or did it reset into the bootloader? Can you add logging in the application and use the debug version of the bootloader with RTT logging, and upload here?

RE: Failed to do DFU

Richard Yin — Wed, 16 Jan 2019 07:50:05 GMT

Dear Einar,

Thank you for your patience!

We had a stranger phenonmenon of our device DFU:

For a particular device we used nRF connect or our App to do DFU for many times successfully, but when failed by using nRF connect or App by accident, then we never get success to do DFU no matter using nFR connect or App. The device was always stayed the stage of 'Start bootloader...'. On this case, we debug mobile App into DFU library, got the error information:

Response received (Op Code = 1, Status = 4)
Device returned error after sending Enter Bootloader

Best regards,

Richard

RE: Failed to do DFU

Einar Thorsrud — Tue, 15 Jan 2019 11:50:22 GMT

Hi Richard,

The NRF_DFU_RES_CODE_INVALID_OBJECT error is documented here:

Data object does not match the firmware and hardware requirements, the signature is wrong, or parsing the command failed.

This typically means that the bootloader checked the init packet and found something wrong (could be wrong version of application, bootloader, SoftDevice, hardware or similar or that the signature is invalid).

RE: Failed to do DFU

Richard Yin — Tue, 15 Jan 2019 09:04:19 GMT

Dear Einar，

In Andriod App, when app excuted NRF_DFU_OP_OBJECT_EXECUTE(Execute selected object) command, NRF_DFU_RES_CODE_INVALID_OBJECT() returned.
Do you have any idea of the reasons which caused this error?

Thanks,

Richard

RE: Failed to do DFU

Einar Thorsrud — Mon, 14 Jan 2019 13:37:18 GMT

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

RE: Failed to do DFU

Richard Yin — Sun, 13 Jan 2019 10:38:46 GMT

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

RE: Failed to do DFU

Einar Thorsrud — Fri, 11 Jan 2019 10:12:02 GMT

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.

RE: Failed to do DFU

Richard Yin — Fri, 11 Jan 2019 06:18:54 GMT

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

RE: Failed to do DFU

Einar Thorsrud — Wed, 09 Jan 2019 14:25:27 GMT

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.