How to born nrf_desktop's image to nrf52840dongle

[sam]

I'm now trying to test dongle on nrf52840dongle board：

  1.   west build -b nrf52840dongle_nrf52840 -- -DCONF_FILE=prj_4llpmconn.conf

  2.  open nRF Connect for Desktop's  Programmer.

  3. add the build\zephyr\merged.hex to Programmer.

  4. start write to nrf52840 dongle board.

  5. Prompt to select softdevice, and i select "0x100(s140_nrf52_7.2.0)".

  6. get message"Error: Failed with exit code 1. One or more program tasks failed. Message: Failed, [sdfu]."

  7. try other softdevice, get the same result.

   Am I overlooking something or a step?

    **Environment

• OS: Windows
• Toolchain: Zephyr SDK 0.16.3, python 3.10.11, west 1.2.0
• nrf connect SDK v2.5
• nrf52840 dongle (PCA10059)
• nRF Connect for Desktop 4.2.0 ,  Programmer 4.0.1

[Simonr]

Hi David

What .hex file is it you're talking about here. The project's .hex file should be called merged.hex. Located in the build folder as follows: C:\ncs\v2.7.0\zephyr\samples\bluetooth\peripheral_hr\build\

Opening this file in the Programmer app lets me write the application onto the nRF52840 Dongle when it's in bootloader mode.

Best regards,

Simon

[david_owtschinnikow]

Hi Simonr,

Thank you, I was loading the wrong file (zephyr.hex) instead of merged.hex. It works fine now. 

Best regards

David 

[Simonr]

Glad to hear that David! Let us close this case then.