nRF51 DK not detected (no LED5)

RE: nRF51 DK not detected (no LED5)

MartinBL — Wed, 23 Aug 2017 08:47:06 GMT

Great! Happy to help.

RE: nRF51 DK not detected (no LED5)

RohanKadam — Wed, 23 Aug 2017 06:26:06 GMT

Hi Martin.

The third point asked by you,solved my problem.

Discussion on how bootloader issue got solved. devzone.nordicsemi.com/.../

Thanks.

RE: nRF51 DK not detected (no LED5)

MartinBL — Mon, 21 Aug 2017 11:53:50 GMT

Hi @RohanKadam. Can you answer all the 6 questions I initially asked ac1dg?

RE: nRF51 DK not detected (no LED5)

RohanKadam — Fri, 18 Aug 2017 06:23:20 GMT

Hey ac1dg, Is the problem solved ? Any new updates ?

Even I am facing the same problem. According to the discussion in comment section of this link [https://devzone.nordicsemi.com/question/35469/nrf51-dk-board-not-detected/], Try using External Segger J-link Edu module.

RE: nRF51 DK not detected (no LED5)

ac1dg — Tue, 25 Jul 2017 11:00:28 GMT

Hi Martin,

thank you for your quick response!

I am using Linux and the device is not listed in lsusb or produces output in dmesg. I tried Windows as well, there is no device showing up.
I tried three different ones, no change. The cables work with other devices
Yes, I did try to connect the device in bootloader mode (connecting with IF BOOT/RESET button pressed), still no device on both machines with different cables
VDD is 2.93V
Using Linux, no device shows up, so I think I can leave this one out.
I already tired this: JLink says ERROR: There is no debugger connected to the PC, so I can not enter the commands

@rogerclark: there is no device showing up

RE: nRF51 DK not detected (no LED5)

Roger Clark — Tue, 25 Jul 2017 10:23:20 GMT

Assuming you are running windows, open the device manager under "Universal Serial Bus controllers" You should see "J-Link driver" listed

RE: nRF51 DK not detected (no LED5)

MartinBL — Tue, 25 Jul 2017 10:07:44 GMT

Hi, just a few standard questions for you:

Does the device show up in Device Manager on your computer? Please try to connect and disconnect the kit a few times. It might show up with unexpected names.
Have you tried a different USB cable? Faulty cables are surprisingly often the issue.
Have you tried to press the IF BOOT/RESET button while power cycling the kit? It should then show up as a Removable Storage Device named "BOOTLOADER". Then you can drag-and-drop this file onto the storage device to reprogram the JLINK firmware.
Can you measure the supply voltage on the nRF Device?
Can you make sure that you are using the latest J-Link driver version? www.segger.com/.../jlink
Can you try this guide? devzone.nordicsemi.com/.../