Response value 6: Operation Failed when attempting to write 0x01 Start DFU to DFU Control Point

RE: Response value 6: Operation Failed when attempting to write 0x01 Start DFU to DFU Control Point

tesc — Thu, 22 Feb 2018 14:53:09 GMT

Yes, you are missing the c4 parameter. I agree the documentation is not easy to read. The paragraphs on that documentation page lists only the opcodes, without parameters, but the table below lists them all in a not quite intuitive way.

For the "Start DFU" operation you have opcode 0x01 followed by the C4 parameter. The C4 parameter is the entry in the table whose "Field requirement" is designated "C4", i.e. the one named "DFU Image Type". In the "Enumerations" table you will see that the value describes if this is a SoftDevice update, a bootloader update, or an application firmware update.

Similarly, you find the meaning of the return codes in the "Enumerations" table for the C2 parameter.

3 = Not supported
6 = Operation failed

You would get 3 if you have given a C4 parameter which is not supported (i.e. a combination of updates that is not supported), and you would get 6 if you fail to provide all the parameters.

RE: Response value 6: Operation Failed when attempting to write 0x01 Start DFU to DFU Control Point

minerdev — Thu, 22 Feb 2018 01:16:02 GMT

Looking over this code, I'm convinced I'm missing the c4 parameter. I've since changed the code to include 0x00, 0x01, 0x02, 0x03, etc. after the start dfu byte:

            let dat = Buffer.from(new Uint8Array([0x01, 0x00]))

..but I'm getting back status code 3. Any ideas?

RE: Response value 6: Operation Failed when attempting to write 0x01 Start DFU to DFU Control Point

minerdev — Wed, 21 Feb 2018 21:19:21 GMT

I believe I may be missing the requirement c4 parameter? How do I include this? Reading over the documentation it is not clear:

infocenter.nordicsemi.com/index.jsp