https://devzone.nordicsemi.com/f/nordic-q-a/13413/gazell-device-host---pipeMy application had a ID to separate difference device &amp; host for the communication in the same area. When the Host power up, it need to search any existing same ID Host nearby. Can we use the difference pipe to separate difference ID of Host/Device inen-USTelligent Community 13Tue, 26 Apr 2016 12:26:05 GMThttps://devzone.nordicsemi.com/thread/51198?ContentTypeID=1Tue, 26 Apr 2016 12:26:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7ff88e3f-2e07-4ab8-9426-cf67cc7bbc90Kenneth<p>The pipe is not relevant, only the address of a pipe is relevant. So if pipe0 address of host0 is different from all pipe addresses of host1, then only host0 will receive and can transmit ACK packet to a device using pipe0 address.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/51197?ContentTypeID=1Tue, 26 Apr 2016 01:00:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8f42fce7-45d7-4b00-bac8-e99b85b7aa61Steven Ng<p>host 1 using pipe 0, host 2 using pipe 1. And one device using the pipe 1 then send a packet on the air. Is it host 1 &amp; 2 will replies ACK? Is it the device send receive both host 1 &amp; 2 ACK and the ACK payload?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/51196?ContentTypeID=1Mon, 25 Apr 2016 11:10:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aaecd64b-7151-4569-beb7-401ea7f83b66Kenneth<p>In Gazell there is no way for a host to know if there exists other host with the same pipe addresses. You might try to setup the host in device mode and send a dummy packet with the same addresses, to see if there is any other host that can receive it.</p> <p>All pipes need to have a unique address, if two hosts use the same address, then a device might accidentally send the same data to both hosts.</p><div style="clear:both;"></div>