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

[skelly7769]

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

[Amanda Hsieh]

The device will reset when the upgrade completes and the dongle will no longer show up in nRF Connect unless the application used DFU Trigger Library is used, as it is no longer in DFU mode. You will get an error stating "Reopen device failed" in this case, and have to push the RESET button in order to make it show up in nRF Connect Programmer again.

-Amanda H.

[skelly7769]

I know that it shouldn't pop up in nRF connect but it won't show up in device manager like it's not connected. How can I change the uf2 file 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.

[skelly7769]

i belive the problem is the application was for revision 2 of dongle but i have revision 3

[Amanda Hsieh]

How/What do you modify the application? 

Which SDK are you using? Are you using the open_bootloader project?

-Amanda H.