https://devzone.nordicsemi.com/f/nordic-q-a/110937/updating-the-dfu-remotely-sdk11I&#39;m running a nRF52 device that&#39;s built on nRF5 SDK11, and it&#39;s remaining that way now due to regulatory reasons. My application needed to be updated to support bonding, and that&#39;s gone smoothly, however I wanted to ensure that a bonded firmware, whenen-USTelligent Community 13Wed, 05 Jun 2024 22:08:10 GMThttps://devzone.nordicsemi.com/thread/487583?ContentTypeID=1Wed, 05 Jun 2024 22:08:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9f9a26be-d7db-407f-881c-6b2275a7a445rkap<p>Exactly what was needed, thank you.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/482235?ContentTypeID=1Tue, 07 May 2024 10:15:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:19849432-683d-4567-9622-97848fd84f21Vidar Berg<p>Hello,</p> <p>The legacy DFU solution in the nRF5 SDK 11 requires a different package format compared to the Secure DFU solution introduced in SDK 12. To create a DFU distribution packet compatible with legacy DFU, you must use version v0.5.x of nrfutil (My coworker Sigurd provided a pre-compiled Windows executable for this version in this post:&nbsp;&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/58141/dfu-generate-package-using-nrfutil-cannot-able-update-over-the-air/235965">RE: dfu generate package using nrfutil cannot able update over the air</a>&nbsp;)&nbsp;&nbsp;</p> <p>Instructions for creating DFU packages can be found in the SDK documentation here:&nbsp;<a title="Creating an image file" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/bledfu_example_image.html?cp=9_5_13_4_3_1_1_2">Creating an image file</a>.&nbsp;</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>