RE: Need confirmation that using Nrfutil as serial master must do BL+SD+APP in 2 separate downloads (BL+SD first then APP)

Edvin — Tue, 16 Jun 2020 13:56:11 GMT

Hello,

I can confirm that when you perform a combined BL+SD+APP update with nrfutil over serial it is split into two parts. First BL + SD in one go, and then APP after that.

Test the attached .bat script. Place it in the SDK16.0.0\examples\dfu\secure_bootloader\pca10056_uart\armgcc folder, and run it from a terminal.

You can see that once the DFU progress reaches about 80%, the LEDs on the DK will turn off. This is when it shuffles around the new bootloader and softdevice, before it will reset, and nrfutil will connect again, and perform the application DFU.

devzone.nordicsemi.com/.../test.bat

(change all the occurances of "111111111" with the Segger ID of your DK).

Best regards,
Edvin