https://devzone.nordicsemi.com/f/nordic-q-a/56378/ota-with-the-bc480-eval-boardHi, I have the BC480 eval board and I would like to be able to upload the simplist application to it OTA. blinky_pca10056.hex I&#39;m using the Nordic Toolbox application DFU. It see the chip but give a DFU error when I try to upload. I&#39;m gettingen-USTelligent Community 13Mon, 13 Jan 2020 10:06:19 GMThttps://devzone.nordicsemi.com/thread/228751?ContentTypeID=1Mon, 13 Jan 2020 10:06:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6bac36a2-2e99-43e1-b56e-1cace624cf02Vidar Berg<p>Hi John,</p> <p>The DFU process requires an init file with extra information about the update in addition to the application image.&nbsp; The init file includes version requirements, the hash digest of binary image, type of upload, etc. which are not found in a intelhex file. I suggest that you go through Hung&#39;s guide here to get started:</p> <p><a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/getting-started-with-nordics-secure-dfu-bootloader</a> </p><div style="clear:both;"></div>