https://devzone.nordicsemi.com/f/nordic-q-a/124118/bluetooth-failCurrently, we are developing our own board with NRF5340-CLAA. It does not have a 32.768kHz crystal oscillator, only an external 32MHz crystal oscillator. We have applied the Bluetooth central from the copy sample, and the parameters in prj.conf are configureden-USTelligent Community 13Wed, 03 Sep 2025 08:56:30 GMThttps://devzone.nordicsemi.com/thread/547581?ContentTypeID=1Wed, 03 Sep 2025 08:56:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c637cfb7-0e35-470b-a2b4-66efcbf186b2Turbo J<p>Expected behaviour, the DK boards all have the LF crystal populated.</p> <p>You have to switch to calibrated LFRC via config and/or device tree (DT) overlay. You will have to master both before successfully developing your own project anyway.</p> <p>Note that this is a commonly asked question here - try using the search function.</p><div style="clear:both;"></div>