How to erase the complete nrf52832 DK completely?

[pradeep8892]

Hi All.

I have an issue with my development kit. I was working with DFU so I flashed the secure_bootloader project in my nrf52 DK  so it is working fine.

But after this bootloader project, if I flash any other project, I can not see the other project ble services, Like I flashed the ble_app_uart example, so uart service hidden and is replaced by Secure DFU services. I tried to erase the complete board using nrfjprog, j-flash, nrf-go studio, and segger embedded studio also but secure DFu services are still present and other project services get hidden.

Can you please anyone suggest how can I remove this secure DFu service, if this is because of the bootloader is there any way to erase the bootloader program? 

[Turbo J]

nrfjprog -f NRF52 --recover

or

nrfjprog -f NRF52 --eraseall

should work.

[pradeep8892]

Hi Turbo,

So, I erased NRF52 DK using these commands also but not working. After erasing when I flashed the ble_app_uart project again I can see secure dfu service instead of ble uart service. So Uart service get hidden

Thanks & Regards

Pradeep

[Vidar Berg]

Hi Pradeep,

Please try to perform a new service discovery by clicking the "3 dot" button in the top right corner and select "Refresh services". It looks like your phone has cached the attribute table from a previous connection.

Best regards,

Vidar