https://devzone.nordicsemi.com/f/nordic-q-a/48007/nrf52-for-sdk15-x-single-channel-adv-issueHI: Since SDK 15.x was released, the broadcasting channel settings have changed completely. The specification manual of Bluetooth 5.0 is found through source file annotations, and the relationship of each bit is modified according to the structure parameteren-USTelligent Community 13Mon, 03 Jun 2019 21:13:51 GMThttps://devzone.nordicsemi.com/thread/190623?ContentTypeID=1Mon, 03 Jun 2019 21:13:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3b54d680-ae2b-4f25-a01b-b730a3a8e736Kenneth<p>Typically you memset() variables to 0, so if you don&#39;t change them you expect default behaviour.</p> <p>Kenneth</p><div style="clear:both;"></div>