'Recovery Failed. Unknown error' nRF52 DK

[Ignacio Lopez]

I have open a brand new nRF52 Development Kit. It is not recognise by the nRFgo Studio. I have tried the trick you mention on this thread:

https://devzone.nordicsemi.com/f/nordic-q-a/27216/nrf52832-can-not-be-recovered

without lack. I did flash the lastest nRF5x-OB-JLink-IF version 170724. After this trick the dev kit is updated to the latest segger firmware v22g but the recovery still gives an error. 'Recovery Failed. Unknown error'.

Any help most welcome

[Martin Lesund]

Hi ignacio,

1. Make sure that you have nRF5x Command Line Tools installed

2. Download J-Link v6.22 

(you can check your version with going to "cmd" and use the command "nrfjprog -v")

I would also recommend you to go through this list.

Try to open "j-link configurator" and see if your board is recognized there. 

 

If nothing works, run the cmd "nrfjprog.exe --recover --log" and post the log here.

 

[Ignacio Lopez]

Just to complete the info on your last line:

nrfjprog.exe --recover --log will return the following

Just nrfjprog.exe --recover returns the following

[Turbo J]

Sure that thi is a recent version? Should moan about NRF52 and not NRF51 - which uses a differen unlocking procedure AFAIK.

[Ignacio Lopez]

It is a PCA10040 nRF52 dev kit. V1.2.0

[Ignacio Lopez]