bootloader issue during flashing

[ostelmakh]

I followed the steps below:
flash softdevice

nrfjprog -f nrf52 --program s132_nrf52_7.0.1_softdevice.hex --chiperase

 
flash bootloader

nrfjprog -f nrf52 --program bootloader.hex

generate package

nrfutil pkg generate --application blinky_pca10059_mbr.hex --application-version 2 --hw-version 52 --sd-req 0xCB --key-file private-key.pem app_test.zip

flash package

nrfutil dfu serial -pkg pp_test2.zip -p /dev/ttyACMO 

But after that I can't connect to this board by using usb and need again connect j-link to flash bootloader.
How can I flash application and then connect to board without j-link?

[Amanda Hsieh]

Hi, 

Are you use nRF52840DK (pca10056), nRF52832DK (pca10040) or nRF52840 Dongle hardware (PCA10059)? I see you generate DFU package with blinky_pca10059_mbr.hex. Do you use nRF52840 Dongle hardware (PCA10059)?

For nRF52832, you can use s132, but you should use s140 for nRF52840. Then you should check the --sd-req config again.

If you use nRF52840 Dongle hardware (PCA10059), Note that the dongle must be in bootloader mode to receive a new DFU image. Please have a look at this tutorial for more details. 

-Amanda H.

[ostelmakh]

Thank you for answer!

I use nRF52840.

I tried s140, but anyway it doesn't work. 

--sd-req 0xCA   s140_nrf52_7.0.1_softdevice.hex

Also my application doesn't work with softdevice, but without it - works

[Amanda Hsieh]

What is your application? Have you tested with hrs_application_s140.zip under nRF5_SDK\examples\dfu\secure_dfu_test_images\uart\nrf52840? 

-Amanda H.

[ostelmakh]

Yes, I tested - the same result