NRF52 not response when connecting to pc via USB

RE: NRF52 not response when connecting to pc via USB

SuperPoorUser — Fri, 04 Jun 2021 02:08:25 GMT

I did not change any H/W settings on nRF52-DK,

what I did to the PCB is

USB cable connection

Power Switch to on/off

Button1 ~ Button4

=> and more

The 2 PCBs are not work but on both PCBS, the LED1 ~ LED3 are on LED4 is off,

I'm not sure that is a clue or not.

RE: NRF52 not response when connecting to pc via USB

awneil — Tue, 01 Jun 2021 10:01:11 GMT

[quote userid="74655" url="~/f/nordic-q-a/75846/nrf52-not-response-when-connecting-to-pc-via-usb/312783#312783"]The LED 'LD5' (LED RG?) on NRF52-DK flashes[/quote]

So that's the status light for the onboard J-Link:

https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/interf_mcu.html

[quote userid="74655" url="~/f/nordic-q-a/75846/nrf52-not-response-when-connecting-to-pc-via-usb/312783#312783"]

Now, When I attach my NRF52-DK to the Windows PC,

the LED 'LD5' doesn't flash.

PC doesn't recognize the board => no open-folder, cannot find any com port of NRF52-DK

[/quote]

Dodgy USB cable?

Broken USB socket on the DK?

Have you changed settings so that the onboard J-Link is no longer powered from the USB:

https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_power_sup.html

RE: NRF52 not response when connecting to pc via USB

SuperPoorUser — Tue, 01 Jun 2021 08:37:59 GMT

Hi:

After check , we have 2 pcs of nrf52-dk in this situation.

the board is nRF52-DK
the 'LED RG' is the name found in the schematic.
Sorry for my short description

The situation in detail

=> Originally, when I connect the nRF52-DK to a Windows PC

The LED 'LD5' (LED RG?) on NRF52-DK flashes,

PC recognizes the nRF52-DK board and open the a folder to show the J-LINK or something ...

I can find the NRF52-DK and link when I open nrf-go

=> Now, When I attach my NRF52-DK to the Windows PC,

the LED 'LD5' doesn't flash.

PC doesn't recognize the board => no open-folder, cannot find any com port of NRF52-DK.

RE: NRF52 not response when connecting to pc via USB

awneil — Tue, 01 Jun 2021 07:26:09 GMT

[quote userid="74655" url="~/f/nordic-q-a/75846/nrf52-not-response-when-connecting-to-pc-via-usb"]an NRF52 EVK[/quote]

Is it a Nordic kit? Please give full details, and a link.

[quote userid="74655" url="~/f/nordic-q-a/75846/nrf52-not-response-when-connecting-to-pc-via-usb"]The LED "LED RG" [/quote]

The Nordic nRF52-DK doesn't have an "LED RG"

https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_btns_leds.html

[quote userid="74655" url="~/f/nordic-q-a/75846/nrf52-not-response-when-connecting-to-pc-via-usb"]Any idea to check it[/quote]

See its documentation? Contact its manufacturer/supplier for support?