52840-DK does not show up on USB subsystem, cannot connect for programming

RE: 52840-DK does not show up on USB subsystem, cannot connect for programming

Simonr — Mon, 07 Oct 2024 11:19:15 GMT

How is the nRF52840 DK connected to the computer now, can you provide a photo of the DK, and also please confirm all the steps from my previous reply.

Best regards,

Simon

RE: 52840-DK does not show up on USB subsystem, cannot connect for programming

tomhenley — Fri, 04 Oct 2024 22:08:33 GMT

Thanks SImon, jlink now detects the board. After running nrfjprog --recover I cannot program using command line but errors in the GUI. Can you make any suggestions?

RE: 52840-DK does not show up on USB subsystem, cannot connect for programming

Simonr — Fri, 04 Oct 2024 09:34:58 GMT

Can you confirm the state of the nRF52840 DK, as that seems to be what's not being detected correctly.

Have you cut solder bridge SB40 at some point for current measurements? If so, you need a jumper cable on pin header P22 to communicate correctly with the debugger.
Confirm that the Power Switch is on, VEXT->nRF switch is OFF, nRF Power source switch is in the middle position (VDD) and nRF ONLY | DEFAULT is in DEFAULT position.
Does the LED5 light up when powering the board?

Best regards,

Simon