https://devzone.nordicsemi.com/f/nordic-q-a/78463/about-the-esb-tx-failed-events-of-nrf5340I use two nrf5340dks to run the routines in NCS \ v1.5.0 \ NRF \ samples \ ESB; The distance between the two nrf5340dks is only 10cm. When the transmission interval is set to 100US, a large number of &quot;TX failed events&quot; (about 10 per 1000) are printeden-USTelligent Community 13Mon, 16 Aug 2021 00:52:20 GMThttps://devzone.nordicsemi.com/thread/324993?ContentTypeID=1Mon, 16 Aug 2021 00:52:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:38dd67f5-9809-419e-93c1-6efe9ce57588mingjkl<p>Thank you for your answer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/324591?ContentTypeID=1Thu, 12 Aug 2021 07:19:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:99108f21-9ee9-4d73-8f2a-facf2841920aovrebekk<p>Hi&nbsp;</p> <p>Is there a lot of log activity on the TX or RX side?&nbsp;</p> <p>Is there anything else happening in the application that might be causing a lot of CPU activity?</p> <p>Have you tried to measure exactly how fast the packets are sent over the air?&nbsp;<br />If you get close to the limit of how fast you can send packets it is possible that the RX has not yet had time to enable the receiver by the time the next packet is sent.&nbsp;</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>