NRF dongle not booting up after flashing

[skelly7769]

The firmware that i flashed onto it worked on others dongles but mine doesnt boot up or windows doesnt detect it or play the usb sound

[Amanda Hsieh]

Hi, 

Are you using this nRF52840 Dongle? or provide by other vendors? 

How do you program the dongle? and What firmware are you flashing?

This tutorial  nRF52840 Dongle Programming Tutorial might help. 

Regards,
Amanda H.

[skelly7769]

I'm using the normal dongle nrf52840 trying to flash it through programmer as a steamvr dongle it replaces the bootloader with nothing I believe the issue is that I need bootloader.hex

[Amanda Hsieh]

You can merge the bootloader image with SD+APP image. See Merging files with mergehex doc.

[skelly7769]

Could you send the open bootloader hex? Idk where to find it

[Amanda Hsieh]

The image is in the "Revert to production bootloader" section in that nRF52840 Dongle Programming Tutorial or you could generate it from the nRF5_SDK\examples\dfu\open_bootloader. 

[skelly7769]

It still doesnt recognize the usb or make a sound

[skelly7769]

also the file i got came with the UF2 too but idk how to put it on the dongle

[Amanda Hsieh]

Hi, 

skelly7769 said:

but it won't show up in device manager like it's not connected

Seems the application doesn't have/enable the USB function. 

I'm not sure I know what the UF2 file is. If you are using the image from Adafruit, I would suggest you to contact Adafruit to get their support. 

Regards,
Amanda H.

[skelly7769]

Its not from adafruit but i wanna know how can i change the uf2 file on the chip

[Amanda Hsieh]

Unfortunately, I don't have the resources and enough knowledge for the uf2 file. I would leave this question to the other experts on this forum. You also could contact the file provider.  

-Amanda H.

[skelly7769]

Now im getting errors in programmer 

01:31:35.018

Does not need to be reloaded: C:\Users\a\Desktop\pca10059_bootloader-0.7.0_s140_6.1.1 (2).hex

[Amanda Hsieh]

I don't think "Does not need to be reloaded" is an error. That file is the same as the one on the dongle, so it doesn't need to load again. 

-Amanda H.