nRF connect buttons greyed out, working with nRF52840DK.

[cpeng]

After nRF52840DK is flashed with open bootloader project through J-link (usb port J2 on the short side of the board), nRF connect is showing the following interface when connected through usb port J3.

As you can see the few buttons like "erase all" are greyed out.

Can anyone help on this issue? Thanks.

[Simonr]

Hi

In order to use the nRFConnect functionalities you need the debugger present as well, so you will have to connect using the J2 port and connect to nRFConnect in order to use the erase functionalities.

Best regards,

Simon

[cpeng]

I connect the board using J2 port as you recommended, nrfconnect cant even recognized the board as shown in below picture:

[cpeng]

Sorry having trouble uploading image. basically it just says

Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device.