52820 's firmware of app+usb dfu

[pipixia_8_8]

Hi,nordic term，

i develop my product that ony have feature with usb and app,there is no sd and ble.i have developed my porject,and now i need achieve the funcation of dfu by nrfutil usb.but i discover that the cmmand  " nrfutil pkg generate cmmand" must need the options off sd,so if i can dfu without sd,just by usb?

[Einar Thorsrud]

Hi,

Starting with SDK 15.0.0 there is no longer a dependency on the SoftDevice if you don't use BLE. However, nrfutil requires you to specify a SoftDevice with --sd-req nonetheless, and for that you use 0x00 which means no SoftDevice.

So the nrfutil pgk generate command can look something like this:

nrfutil pkg generate --hw-version 52 --sd-req 0x00 --application blinky_pca10040e_mbr.hex  --application-version 2 --key-file C:\vault\priv.pem dfu.zip