https://devzone.nordicsemi.com/f/nordic-q-a/33612/serial-dfu-bootloader-in-sdk13-and-migration-to-sdk14-15Hi team, My customer wants to apply Serial DFU in their product, but when they are developing with SDK13, they find our release notes with: ** DFU ** - Added support for serial/UART and an example for a secure DFU bootloader using UART (experimentalen-USTelligent Community 13Fri, 27 Apr 2018 12:14:36 GMThttps://devzone.nordicsemi.com/thread/130106?ContentTypeID=1Fri, 27 Apr 2018 12:14:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a2729c4-4a04-40ae-bbd4-b33a43dd6123Rune Holmgren<p>Sorry for the late reply.</p> <p>Examples marked as experimental&nbsp;does not have a full testing procedure designed to uncover all flaws we can imagine, so there may be unknown bugs. We generally do not recommend using experimental examples as stable code in end-user products without testing the implementation very well yourself. For a proof of concept or for use in early development experimental examples are well suited.</p> <p>In the end it&#39;s the customers choice if you want to use the experimental version in SDK 13 or migrate to SDK 14. I recommend migrating to SDK14, and this is not too hard to do if you follow&nbsp;<a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v14.0.0%2Fmigration.html">the migration guide here.</a>&nbsp;You may want to consider moving directly to SDK14.2.0 since it&#39;s API compatible, but has some minor bugfixes which may be nice to have.</p> <p>Best regards,<br />Rune Holmgren</p><div style="clear:both;"></div>