Error: Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device, when plugging in my nrf52840 dk board.

Overnight I was running my nrf52 dk board with my stm32 board. I have a spi interface between the two boards that is working properly. When I went to switch out and switch back in the same board, the board does not get recognized anymore. It only shows up as j-link, and displays the error message:  Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device. Any thoughts to what may be causing this?

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  • This is the log file I get when I try and run the command: nrfjprog --eraseall --log

  • Hi Andrew,

    Is the nRF52DK being recognized by your PC? Does it get recognized when you connect the DK alone after removing all the connections to it?

    Regards,

    Priyanka

  • Hey Priyanka,

    When I load device manager with no boards connected to my computer, I have com3 and com4 already taken. When I plug in this board with no wires connected, my computer recognizes it and places assigns it to com8 and com9. I have also attached screenshots of my board, and how programmer on nrf connect looks before and after I plug in my device in question.

    NRF Connect Before Plugged In:

    NRF Connect After Plugged In:

    Device Manager Before Plugged In:

    Device Manager After Plugged In:

    Picture of Board While Doing all this:

  • Hi,

    Could you try putting the device in bootloader mode? Does this show up in the Programmer?

    Regards,

    Priyanka

  • Hey,

    Unfortunately it does not look like I can put the device in bootloader mode. I was able to put my other nrf52840 dk board into bootloader mode, but it does not look like I can do it for the board in question.

  • Hi Andew,

    Since you have a revision 3 nRF52840DK, it's also not possible to reflash the JLink fw for this. I'm afraid you have a faulty DK and might need to replace it then.

    Regards,

    Priyanka

  • Sad to hear, but thank you for the help!

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