Unable to flash a build of the sample blinky following the nRF Connect SDK Fundamentals tutorial

Hey everyone,

I am new to the development of Nordic chips so I might get some things wronog here or there.

I am using windows 11 and am trying to flash a nRF54l15 DK board

Lets start with the sittuation. I am attempting to follow the nRF Connect SDK Fundamentals tutorial with a new nRF54l15-DK board. I followed all the steps for installing the nRF Connect SDK and VS Code. I then imported, build and tried to flash the code. When I did I had the fatal error that the nrfutil was not installed or in the path. I downloaded that, placed it in the blinky folder and used my windows command prompt to install it. After having done that, I lost the nrfutil fatal error but gained a new one. I also tried connecting using the quick start of the nRF connect for desktop and got to the program step. Here the Erase device shows green but the others are red.

Here is the log of the quick start, which has the same error I get from VSCode's terminal.

2025-01-10T11:01:13.537Z INFO Initialising the bundled nrfutil device
2025-01-10T11:01:13.545Z DEBUG Started watching devices
2025-01-10T11:01:14.562Z INFO Using the bundled core version for nrfutil device: 7.13.0
2025-01-10T11:01:15.012Z INFO Using nrfutil-device version: 2.7.5
2025-01-10T11:01:15.012Z INFO Using nrf-device-lib version: 0.17.41
2025-01-10T11:01:15.012Z INFO Using nrfjprog DLL version: 10.24.2
2025-01-10T11:01:15.012Z INFO Using JLink version: JLink_V7.94i
2025-01-10T11:01:16.538Z DEBUG Selected device: nRF54L15 DK
2025-01-10T11:01:16.558Z DEBUG Changed step: Info
2025-01-10T11:01:23.661Z DEBUG Changed step: Rename
2025-01-10T11:02:17.819Z DEBUG Changed step: Program
2025-01-10T11:02:45.962Z ERROR  NRFDLException(1): [Probe] Emulator error: No emulator with connection info 'Usb(JLinkSerialNumber(1057701372))' was found
2025-01-10T11:02:45.967Z ERROR [ProbeLib] [2025-01-10 11:02:45.963873Z] Trace channel disconnected unexpectedly.

I have already installed a new version of J-Link, v794i (conform these specs: https://docs.nordicsemi.com/bundle/ncs-2.9.0/page/nrf/installation/recommended_versions.html). I didn't remove the older version though, v794e.

If anyone has any idea how I can fix this problem please let me know!

Geert

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  • Hi Geert

    Could you try to run "nrfutil device list" just to verify that you can see your device?  

    You might have to install device for nrfutil, this can be done by running "nrfutil install device

    I would also recommend placing nrfutil in a sensible place (I have mine in a folder named tools) and add that folder to the windows path

    Regards

    Runar

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  • Hi Geert

    Could you try to run "nrfutil device list" just to verify that you can see your device?  

    You might have to install device for nrfutil, this can be done by running "nrfutil install device

    I would also recommend placing nrfutil in a sensible place (I have mine in a folder named tools) and add that folder to the windows path

    Regards

    Runar

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