https://devzone.nordicsemi.com/f/nordic-q-a/63299/getting-tx-faled-event-when-using-nrf52-in-esb-with-no-dpl-with-noack-trueI am using nrf52832 radios to communicate using ESB without DPL. I have selective_auto_ack=true and I set the payload.noack=true. But each time I transmit and there is not another radio around I get a TX FAILED EVENT. But I do not want to enable acknowledgementsen-USTelligent Community 13Fri, 03 Jul 2020 07:54:49 GMThttps://devzone.nordicsemi.com/thread/258243?ContentTypeID=1Fri, 03 Jul 2020 07:54:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d0defac1-6efd-46a2-bd23-6e775cb7fcb9ovrebekk<p>Hi</p> <p>This is probably not documented very well, but if you disable DPL then the dynamic ACK feature doesn&#39;t work.&nbsp;</p> <p>In the original ESB implementation in the nRF24L family of devices (nRF24L01+, nRF24LE1 etc) you had to enable dynamic payload length on each pipe where you wanted to use either the dynamic payload length, dynamic ACK or ACK payload features.&nbsp;</p> <p>Using any of these three features requires a different packet header,&nbsp;and to get this packet header you need to configure the nrf_esb library in ESB_DPL mode.&nbsp;</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>