https://devzone.nordicsemi.com/f/nordic-q-a/3942/nrf24l01-ack-payload-settingHi, after a deep study of Datasheet I was finally able to have two 24L01+ talk to each other with a PIC18 program. Now I need to make a step further using ACK Payload since the PRX should send a 1 byte payload to PTX with commands...and here I&#39;m losten-USTelligent Community 13Fri, 10 Oct 2014 13:00:54 GMThttps://devzone.nordicsemi.com/thread/14184?ContentTypeID=1Fri, 10 Oct 2014 13:00:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0e0d927c-297a-47fc-b251-9fbd5ba84c28Asbj&#248;rn<p>Q1: Yes, configure the same settings on the PTX. Q2: You don&#39;t have time to write a new ack payload between receiving a package and sending the ack on the PRX. So you have to upload the ack payload before you receive the package you send the ack payload for.</p> <p>See the attached multiceiver code for the nRF24LE1 that uses 2 pipes and ack payloads on both. The radio settings and configurations should be identical tp what you use on the nRF24L01+.<a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/enhanced_5F00_shockburst_5F00_multiceiver_5F00_ack_2D00_payload_5F00_example.zip">enhanced_shockburst_multiceiver_ack-payload_example.zip</a></p><div style="clear:both;"></div>