https://devzone.nordicsemi.com/f/nordic-q-a/27192/timeslot-esb-and-ble-problemHi, I&#39;m trying to implement run the ESB and the BLE concurently using the timeslot API. I started from this example : devzone.nordicsemi.com/.../ The problem is this example is designed for the nRF51 SDK 9.0.0 and the S130 1.0.0 and my project runen-USTelligent Community 13Mon, 06 Nov 2017 10:35:00 GMThttps://devzone.nordicsemi.com/thread/107159?ContentTypeID=1Mon, 06 Nov 2017 10:35:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:196194a3-0aa6-400d-ada2-a6230ef147e0Francois Mazard<p>ok I found the error : SWI4_IRQn and SWI5_IRQn are used by the softdevice. Because I also use them for the timeslot api, the softdevice crash.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/107158?ContentTypeID=1Wed, 01 Nov 2017 13:24:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dba98a6a-173d-47d0-8cbe-d4b39bb1d094Martin Tverdal<p>It seems that the SoftDevice is waiting for the LFCLOCK to start. Can you double check that you are selecting the correct LF clock source (XTAL or RC) when you are enabling the SoftDevice?</p> <p>Are you using your own pcb? or a nordic dev kit?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/107157?ContentTypeID=1Fri, 27 Oct 2017 09:19:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0319489a-231e-4596-b740-9074fb4c2bebFrancois Mazard<p>I get this address thit the debugger. When the device is stucked, I halt the chip and I get the last function address in the heap</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/107156?ContentTypeID=1Fri, 27 Oct 2017 09:04:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8840e9c4-eb84-44ff-83fc-22f59fd10fc1MartinBL<p>Do you get an assert at that address? Do you get an assert ID as well as the address?</p><div style="clear:both;"></div>