https://devzone.nordicsemi.com/f/nordic-q-a/24423/disable-ack-at-receiver-in-enhanced-shockburstHi Nordic, I am using ESB_DPL SDK ver 13 for communication between one nRF51822 transmitter and multiple nRF51822 receivers with data whitening. I do not want the receiver to ACK any packets and have disabled auto_ack on the transmitter by settingen-USTelligent Community 13Fri, 18 Aug 2017 07:02:49 GMThttps://devzone.nordicsemi.com/thread/96182?ContentTypeID=1Fri, 18 Aug 2017 07:02:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:adbfb178-c70f-4c38-b107-054550c06446ovrebekk<p>Hi Alan</p> <p>When you say &quot;other nRF51822 transmitters&quot;, do you mean devices outside your control?</p> <p>What are your address and CRC configurations?<br /> Unless you have both an address and a CRC match you should not send an ACK, so it seems odd that you would respond to random packets in the area.</p> <p>Best regards</p><div style="clear:both;"></div>