Flashing Blinky Sample to nRF52840 Dongle?

[Andreas Schurz]

Hi,

I tried to flash the blinky example to an nRF52840 Dongle as described here:

https://academy.nordicsemi.com/flash-instructions-for-nrf52840-dongle/

Console output is:

C:\Users\andre\blinky\build_2\zephyr>nrfutil pkg generate --hw-version 52 --sd-req=0x00 --application zephyr.hex --application-version 1 app.zip

|===============================================================|
< Some Warning banner in #>
|===============================================================|
|You are not providing a signature key, which means the DFU |
|files will not be signed, and are vulnerable to tampering. |
|This is only compatible with a signature-less bootloader and is|
|not suitable for production environments. |
|===============================================================|

Zip created at app.zip

C:\Users\andre\blinky\build_2\zephyr>nrfutil device program --firmware app.zip --traits nordicDfu
[00:00:01] ###### 100% [2/2 FBFBA52BE6C1] Programmed

The problem is:

Programming LED (which was blinking) turns then off and Blinky does not seem to come up, i. e. LED is NOT blinking.

Same program works on my Thingy:53 like a charm.

Question:

What am I doing wrong here?

Many thanks in advance.

Regards, Andreas

[Andreas Schurz]

Hi Amanda,

VS Code integration has no longer a specific nRFConnect Terminal instead tells to you default terminal which is not capable of using "'west". However the second method with the toolchain manager works.

Build calls needs to be the following in this case - documentation is wrong:

west build -b nrf52840dongle_nrf52840 zephyr/samples/basic/blinky

nrfutil pkg generate --hw-version 52 --sd-req=0x00 --application build/zephyr/zephyr.hex --application-version 1 blinky.zip

nrfutil dfu usb-serial -pkg blinky.zip -p COM7

Nevertheless:

Now my green LED is blinking which seems to be fine.

Many thanks for the help. We may close this issue.

Regards, Andreas