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  • Case ID: 298695
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Windows not recognizing nRF52840 DK when connected via USB

RoyceThomas

Hi,

When I connect my nrf52840 DK to the PC via USB, initially it shows up as a drive, but then If I try to flash it from nrf Connect for VS Code, It gets disconnected and after that, the board is not getting recognized.

In the device manager, it is coming up as "Nordic Semiconductor DFU"

Things I tried:

1. Checked with different USB cables.

2. Reinstalled nrf Connect for Desktop and Jlink driver.

3. Connected the DK on another PC, and it gets recognized.

4. Connected another nrf52840 DK and I'm facing the same issue.

5. Tried to press the IF BOOT/RESET button while power cycling the kit and it shows up as a Removable Storage Device named "BOOTLOADER". Then I dragged and dropped the Jlink interface MCU firmware. Diconnected the board and when I connect again the issue still persists.

6. Tried "nrfjprog --deviceversion", but it returns "ERROR: No debuggers were discovered".

My guess is it is something related to my PC and not the DK itself. What else can I try? Is there any possibility to reset the board?

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  • 0

    Hi Royce,

    Thank you for contacting DevZone at NordicSemi.

    Sorry to hear that you are struggling to connect a DK with you PC (let's call it PC1) and thank you for trying different solutions.

    As per your information:
    1) the cable is good (no problem in that)
    2) software installation is good / updated (no problem in that)
    3) connecting DK to other PC (let's call it PC2) is good
    4) connecting another DK shows same issues

    As per #3, the DK as well as the PC2 are good

    for #4, you are connecting a different DK to PC1? if this is the case then it confirms that the problem is not with the DK and infact with your computer (PC1). I am not sure what problem it is, but could be USB port and/or driver issue.

    Other things which you could try (at your own choice) are:
    -update you windows operating system
    -update your device drivers
    -restart your pc
    -hook DK into another USB port (if available)
    -check software & driver on both PCs are same

    What do you mean by "possibility to reset the board"? You have already updated MCU firmware. 

    with regards,
    Naeem

Reply
  • 0

    Hi Royce,

    Thank you for contacting DevZone at NordicSemi.

    Sorry to hear that you are struggling to connect a DK with you PC (let's call it PC1) and thank you for trying different solutions.

    As per your information:
    1) the cable is good (no problem in that)
    2) software installation is good / updated (no problem in that)
    3) connecting DK to other PC (let's call it PC2) is good
    4) connecting another DK shows same issues

    As per #3, the DK as well as the PC2 are good

    for #4, you are connecting a different DK to PC1? if this is the case then it confirms that the problem is not with the DK and infact with your computer (PC1). I am not sure what problem it is, but could be USB port and/or driver issue.

    Other things which you could try (at your own choice) are:
    -update you windows operating system
    -update your device drivers
    -restart your pc
    -hook DK into another USB port (if available)
    -check software & driver on both PCs are same

    What do you mean by "possibility to reset the board"? You have already updated MCU firmware. 

    with regards,
    Naeem

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