https://devzone.nordicsemi.com/f/nordic-q-a/61436/how-to-ble-advertising-with-rtci make a project Every 5 minutes, beacon advertising should be repeated for 30 seconds. Using the RTC example, LED lights and turns off every 3 seconds were realized. Combining this RTC example with the Beacon example does not work properly. //ble_stack_initen-USTelligent Community 13Fri, 15 May 2020 11:35:53 GMThttps://devzone.nordicsemi.com/thread/250159?ContentTypeID=1Fri, 15 May 2020 11:35:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:280bbd6a-ff81-4f23-abc9-3b0267d5b601awneil[quote userid="89972" url="~/f/nordic-q-a/61436/how-to-ble-advertising-with-rtc"]The above two functions seem to be causing conflicts with RTC somewhere[/quote] <p>Would you care to be a little less vague ?</p> <p>I think these 2 functions are going to be required by <em><strong>any</strong></em> application which uses BLE and does advertising - so it can&#39;t anything specific to those 2 functions.</p> [quote userid="89972" url="~/f/nordic-q-a/61436/how-to-ble-advertising-with-rtc"]i use nrf52840 dongle[/quote] <p>do you have a debugger to use with it?</p> <p>If not, it is <em><strong>strongly</strong> </em>recommended that you do your development on a <strong><em>Development</em> Kit</strong> - DK - where you <em>do</em> have a debugger, and other facilities to make development far easier. The clue is in the name ...</p><div style="clear:both;"></div>