"no connect "device in nRF Connect for VSCode

[Claudio Rosa]

I have a nRF52840-DK that I know  that it has a JLink on board, but the RAK4631 don´t have JLink, then I am following the RAKWireless bootloader update(Bootloader update ):

1. Press quickly two times the Reset Button, the RAK4631 will go to bootloader mode, and LED green will be on 
2. Execute the bootloader conversion using the command nrfutil.exe dfu serial -pkg rak4631_factory_bootloader.zip -p COM5. Make sure that you have the right .zip file name and COM port number to avoid errors.
3. When I need to become Arduino BSP compatible, I do the follow steps
   1. The previous step updated the bootloader of RAK4631. Another requirement is to ensure that the softdevice is compatible with the expected version by the Arduino BSP. To do this, execute the command adafruit-nrfutil --verbose dfu serial --package rak4631_factory_softdevice.zip -p COM15. You also have to make sure that you have the right .zip file name and COM port number to avoid errors. The COM port will likely be different compared to step 5.

I would like to know how to prepare the RAK4631 to receive MCUBoot and Zephyr.

Could you help me?

Claudio

[Menon]

Hello,

You can use nrfutil to create a merged DFU package after building your application. Once the package is created, you can use nrfutil to perform the DFU over serial. However, the concern I see here is the bootloader on your board. If the rak4631_factory_bootloader.zip file already has MCUboot flashed on your device, then what you've described should be possible.

Unfortunately, I'm not familiar with the specific bootloader file you mentioned

Kind Regards,

Abhijith