Nordic nRF52840-DK J-LINK cant connect

RE: Nordic nRF52840-DK J-LINK cant connect

eric20075 — Fri, 06 Sep 2019 04:58:45 GMT

I am attaching a video: this problematic board LED1 is in the state of breathing light, and LED5 is not lit.

eric20075 — Thu, 05 Sep 2019 15:37:27 GMT

I have bought two identical development boards. The two operations are exactly the same, but one of them does not detect J-LINK. Is this a board?

eric20075 — Thu, 05 Sep 2019 14:33:35 GMT

I have the correct opening of all the things you said, but I can’t feel it. I think it should be the board.

tesc — Thu, 05 Sep 2019 14:11:44 GMT

Hi,

I cannot see from the video the settings of the following switches:

SW8 (also marked "Power") in the bottom left corner of the board. Should be set to ON.

SW9 (also marked "nRF power source") slightly upwards between the USB connection and the interface MCU (PCA10050 sticker). Should be set to VDD.

SW6 (below marking "nRF ONLY | DEFAULT") at the very top of the board, close to the right side (antenna side). Should be set to DEFAULT.

Can you check that all three switches are set correctly?

Regards,
Terje