Unable to connect to J-Link on nRF52840-DK through VS Code or through Programmer

[Kevin Lannen]

I just installed the nRF toolchain and Programmer application to start using my nRF52840-DK eval board. I have the board connected through J2 to my computer and I can flash firmware files using the J-Link drive that shows up in Windows explorer by dragging the firmware file into the drive.

However, I cannot get either VS Code with the nRF connect extension or the Programmer (v2.2.0) to connect to the J-Link on the eval board. When I try and use the Programmer app I can select the J-Link device but I receive the following logs and connection fails:

21:12:58.407	Using @nordicsemiconductor/nrf-device-lib-js version: 0.4.1
21:12:58.408	Using nrf-device-lib version: 0.9.8
21:12:58.408	Using nrfjprog dll version: 10.15.1
21:12:58.408	Using JLink version: 6.88a
21:12:58.526	Application data folder: C:\Users\kevin\AppData\Roaming\nrfconnect\pc-nrfconnect-programmer
21:13:04.568	Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device.

What do I need to do to be able to connect and debug my applications using the nRF connect extension in VS Code?

Thanks,

Kevin

[Amanda Hsieh]

Hi, 

Please try the latest Command Line Tool v10.15.2 and let me know this can help or not. Thanks. 

Regards,
Amanda

[Kevin Lannen]

Hi Amanda,

That is the version I was using. I tried running the repair on it and I also installed the x86 32 bit version and I am seeing the same results.

Running nrfjprog -i also produces no output with either version.

Thanks,

Kevin

[Kevin Lannen]

I also found this issue https://devzone.nordicsemi.com/f/nordic-q-a/84153/unsupported-device-the-detected-device-could-not-be-recognized-as-neither-jlink-device-nor-nordic-usb-device which looks like it could be similar.

[Amanda Hsieh]

Yes, we are working to fix that. You could try downgrading to v3.7 of the nRF Connect for Desktop as that post indicated. 

-Amanda

[Kevin Lannen]

I found the problem. Somehow the J-Link was not using the correct driver so I went into device manager and uninstalled the device and the drivers. After reconnecting it, the correct drivers were installed and it is working now.