NRF programmer app not flashing a custom board even when in bootloader with mcuboot enabled.

[GregFriedholm]

1. Description and how to recreate it

Im attempting to flash a custom board with a nrf5340 on board using mcuboot via nrf Programmer v4.5.0. 

When I put the board in bootloader mode it tells me that No operation possible.

I saw a post from about 4 years ago saying that this is not possible to use this application to flash custom boards, is this still true?

2. Development Setup 

OS: Ubuntu 24.04.1 LTS

SW: versions

nrf-Programmer v4.5.0

nrf-connect.sdk:2.7.0

nrf-connect.toolchain:2.7.0

Zephyr-sdk using provided from nrf-connect

HW: versions

nrf7002-QFAAAA

nRF5340-CLAA

nPM1300-QEAAB0

[Vidar Berg]

Hello,

The Programmer app does not currently support programming over the mcumgr protocol on custom boards. Instead you can use AuTerm as described in this devacademy course at https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-1-dfu-over-uart/.

Best regards,

Vidar

[GregFriedholm]

Sounds good Thank you Vidar 

[papadkostas]

You can have a look here as well https://github.com/nrfconnect/sdk-mcumgr
I also lost a bit of time trying to flash with programmer application until I tried AuTerm.
I followed the intermediate course and I cannot recall that was mentioned anywhere.