XIAO BLE NRF52840 bootloader is working but uploaded code is not working.

[Velliyangiri]

Hi there,

I am using XIAO BLE board with nrf52840. it was working fine but now I find the different issue.

when I press reset button once bootloader starts to work and DFU USB is there in the windows device manager. I am uploading the application .uf2 file (sample blinky project). after completion of copying, it closes automatically. but application (LED) is not working. Then I tried another sample project, Bluetooth throughput project, there cdc USB did not come and nothing worked.

what is happened now?? Please help me to resolve this issue.

[dejans]

Hi,

Could you provide more information about your XIAO BLE board?

Which NCS version do you use?

Best regards,
Dejan

[Velliyangiri]

Hi Dejans,

I thought that the bootloader code might be corrupted.

I solved the issue by reflashing the default bootloader ".hex" file through J-Link. It is working fine now.

Thank you

[dejans]

Hi,

Thank you for providing the status update. I am glad to know that your issue has been resolved.

Best regards,
Dejan