https://devzone.nordicsemi.com/f/nordic-q-a/65695/upograded-from-sdk-15-0-to-sdk-17-0Hi, We are using today SDK 15.0 and are upgrading to SDK 17.0 for development of our system. In our application, we use BLE communication. While comparing SDK_config.h file of the example: &quot;ble_nfc_pairing_reference&quot;. I saw that there are many differencesen-USTelligent Community 13Tue, 08 Sep 2020 12:02:17 GMThttps://devzone.nordicsemi.com/thread/268510?ContentTypeID=1Tue, 08 Sep 2020 12:02:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d52ac145-cf4b-4662-bbef-c16f99144354awneil<p>This is&nbsp;pretty much a general software development issue: With any software, updating from one &quot;framework&quot; to another is never a trivial task. Especially when jumping a release.</p> <p>The first question, then, is: do you <em>really</em> need to do the update at all? Are there new features or bug fixes that you specifically need in your project? If not, it may be better to just stick with what you&#39;re currently using...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/268502?ContentTypeID=1Tue, 08 Sep 2020 11:52:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:71c76a1d-06dd-4638-84a4-b4158fce15d2AlonBarak<p>I started my project with another example.</p> <p>But the project is using many modules therefor relays on multiple examples, causing the need for this merge.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/268499?ContentTypeID=1Tue, 08 Sep 2020 11:48:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c5038f33-1ed9-433f-b23e-95c37b69b189awneil[quote userid="91956" url="~/f/nordic-q-a/65695/upograded-from-sdk-15-0-to-sdk-17-0"]comparing SDK_config.h file of the example: &quot;ble_nfc_pairing_reference&quot;. [/quote] <p>Is that the example that you used to start your original project.</p> <p>I would suggest that you start with the &quot;clean&quot; example project from the SDK, and merge your custom code into that.</p><div style="clear:both;"></div>