Open Bootloader in nRF5 SDK v17.1.0https://devzone.nordicsemi.com/f/nordic-q-a/119998/open-bootloader-in-nrf5-sdk-v17-1-0Hello, Our company makes module using nRF52840. And we also make development kit with it. I recently programmed open bootloader built-in hex in nRF5 SDK v17.1.0 (examples\dfu\open_bootloader\pca10059_usb_debug\hex\open_bootloader~.hex) And it workeden-USTelligent Community 13Tue, 25 Mar 2025 09:10:21 GMTRE: Open Bootloader in nRF5 SDK v17.1.0https://devzone.nordicsemi.com/thread/528774?ContentTypeID=1Tue, 25 Mar 2025 09:10:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4711be9e-de7a-4275-a289-9dd3c2fb7bedEdvin[quote user=""]And it worked well. I did build source code(examples\dfu\open_bootloader\pca10059_usb_debug) with IAR IDE. And then I wrote hex. But it didn&#39;t work.[/quote] <p>How did it fail? Do you see any logs?</p> <p>Any particular reason why you are using the pca10059, and not the pca10056 version of this project?</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>