https://devzone.nordicsemi.com/f/nordic-q-a/5902/nrf24l01-ack-packet-questionshi, me again, i posted the long and annoying question on PTX to PTX behavior, in a peer-to-peer application. i have a specific question regarding the format of an ACK packet, which does not appear in the datasheet: precisely what is the format ofen-USTelligent Community 13Thu, 12 Mar 2015 17:17:16 GMThttps://devzone.nordicsemi.com/thread/20583?ContentTypeID=1Thu, 12 Mar 2015 17:17:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:07bda279-298d-4736-8d2f-c04c818825b3Asbj&#248;rn<p>The ACK is a normal packet. So preamble, address, packet identificatino field, (ACK payload if defined) and CRC.</p> <ul> <li>Yes, there is CRC on the ACK.</li> <li>You can have CRC with no ack as well.</li> <li>Potentially, yes, it could be interpreted as an ACK. ACK will always be received on pipe0.</li> </ul><div style="clear:both;"></div>