RE: Recovering nrf52840 DK after erasing in VS Code nRFconnect extension

Oide Brett — Fri, 06 Jan 2023 08:02:47 GMT

Thanks a million Marte, This answer was very helpful and now my board is back. Much appreciated

RE: Recovering nrf52840 DK after erasing in VS Code nRFconnect extension

Marte Myrvold — Fri, 06 Jan 2023 07:28:41 GMT

Hi,

Erasing the board should not brick the board, only erase the program and UICR. The nRF52840 has an onboard debugger, so you will be able to program it even if you erase the bootloader.

Please try the following:

Connect the board to your computer
Make sure the switches are in the following states:
SW6: DEFAULT
SW9: VDD power
SW8: ON
Open a terminal and run the following command:
nrfjprog --ids
This should return the serial numbers of all connected J-Link debuggers, for example:
$ nrfjprog --ids
1050723722
683009952

If this command returns a serial number, then your board should be working fine and you just need to program it again. If the command does not return any serial numbers, please let me know.

Best regards,

Marte