Download the bootloader zip file for nRF52840

I would like to prepare my RAK4631 supported board file to Zephyr, but I am having problems with my JLink device, then I bought a new device but it didn´t arrive yet.

As a alternative, I would like to work with the nrfutil like this RAK example, via USB port: “nrfutil.exe dfu serial -pkg rak4631_factory_bootloader.zip -p COM5”.

Where I can find a updated zip bootloader file for Zephyr?  Today I am working with VSCode and nRF Connect for VSCode.

Regards,

Claudio

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