Default boot-loader for dongle

[Hiihtaja]

Hello !

1. I have found in internet bootloader for dongle graviton_bootloader_mbr_v1.0.1-\[nRF5_SDK_15.0.1-1.alpha_f76d012\].hex and able to flash and use it.

   But where I can found latest version of precompiled bootloaer what is based on latest SDK ?

  Or it should be compiled by myself from some known sources  ? Please point me to right page/code.

2. By using the bootloader and nrfutil, I'm able to create dfu.zip and update application only.

BUT

how  issue SW reset by using nrfutil without actual update ?

Sometimes I put dongle like HW to DFU by Reset mode and need to reboot it to normal boot without power on/off operation ?

How to erase application without actual update of it ? Just bootloader should remain.

Regards,

Eugene

[Simonr]

Hi again Eugene

Can you explain what you mean by "reboot nRF to normal mode" here? Are we still talking about the nRF52 Dongle? As long as you flash the bootloader image to the Dongle using nrfutil the device should indeed go back to the bootloader mode, but if it is already flashed onto the Dongle, it will be sufficient to press the side mounted button while the device is powered, and the Dongle will go into bootloader mode.

Best regards,
Simon

[Hiihtaja]

Hi Simon !

I press button and device go to DFU. After that I don't won't to power off/on device and would like to force dongle to normal boot because application is really flashed already on previous rounds.

Can I issue some nrfutil command or power off/on need to initiate normal boot ?

Regards,

Eugene