Secure bootloader for nrf52840 (Dongle)

[Tabassum]

Hi

Am trying to implement the secure bootloader for the nrf52840 for Dongle,I have gone through the existing example for nrf52382 but am unable to find any example for nrf52840 (Dongle)

It would be helpful if someone share any implementation suggestion .

Thanks

Tabassum

[Tabassum]

Hi bjorn

I tried using nrf connect programmer as well , Am not getting any option to erase all or erase and write

[bjorn-spockeli]

The nRF52840 Dongle comes preprogrammed with the Open Bootloader with DFU, which allows users to update the application firmware. However, as stated in the link above: 

• Bootloader update must come from signed packages.

We do not distribute the private key that the public key in the Open Bootloader uses, so the only way to update the bootloader on the nRF52840 dongle is to re-flash using a JLink programmer or the JLink OB programmer on a nRF52xxx DK. You will then have to solder wires to the SWDCLK and SWDIO pads on the nRF52840 Dongle or solder on a 10-pin programming header to the P1 pads.