https://devzone.nordicsemi.com/f/nordic-q-a/52349/wrong-esb-resources-defined-in-nrf5-sdkHi I figured out, that the macros in nrf_esb_resources.h are wrong. You can find the used resources (PPI, TIMER and SWI) of the ESB library in Enhanced ShockBurst User Guide . But in nrf_esb_resources.h, PPI Channels 0, 1 and 2 are defined en-USTelligent Community 13Mon, 23 Sep 2019 07:51:00 GMThttps://devzone.nordicsemi.com/thread/211123?ContentTypeID=1Mon, 23 Sep 2019 07:51:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c1574c65-f571-4a34-9898-7c42f3f0e8b1Kenneth<p>Thanks for reporting. I have added to the internal jira.</p> <p>Kenneth</p><div style="clear:both;"></div>