Zephyr DFU over USB Not Swappinghttps://devzone.nordicsemi.com/f/nordic-q-a/113404/zephyr-dfu-over-usb-not-swappingI am using an NRF52840DK. 1. I erase the chip to start clean: nrfjprog --eraseall 2. I flash the MCUboot bootloader: ~/mcuboot/boot/zephyr$ west flash The output from the console is OK as there is no image: *** Booting MCUboot v2.1.0-43-g50f35144e4e4en-USTelligent Community 13Mon, 19 Aug 2024 23:50:12 GMTRE: Zephyr DFU over USB Not Swappinghttps://devzone.nordicsemi.com/thread/498927?ContentTypeID=1Mon, 19 Aug 2024 23:50:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:872582b9-bc6a-4dff-bd6e-1884b17d95cbAlexander Feldman<p>I finally, found it: dfu-util uses .bin format, instead of .hex. The right command line is:<br /><br /><code>dfu-util --download zephyr.signed.bin --alt 1</code></p> <p>not</p> <p><code>dfu-util --download zephyr.signed.hex --alt 1</code><code></code></p><div style="clear:both;"></div>RE: Zephyr DFU over USB Not Swappinghttps://devzone.nordicsemi.com/thread/495649?ContentTypeID=1Thu, 25 Jul 2024 13:35:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3c7690d9-426f-445d-b5c0-852a93944b3cAmanda Hsieh<p>Hi,&nbsp;</p> <p>Check out this course&nbsp;<a href="https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/exercise-2-dfu-over-usb-adding-external-flash/">https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/exercise-2-dfu-over-usb-adding-external-flash/</a>&nbsp;</p> <p>Do you modify the updated image? If the content is the same, it will not update.&nbsp;</p> <p>Regards,<br />Amanda H.</p><div style="clear:both;"></div>