changing the advertisement packet of ibeacon to include scanned uuid/mac address and rssi valuehttps://devzone.nordicsemi.com/f/nordic-q-a/16625/changing-the-advertisement-packet-of-ibeacon-to-include-scanned-uuid-mac-address-and-rssi-valueHi , I have 2 nrf51 dongle compiled with a code which can scan and advertise ibeacon constantly. Whenever receive advertisement packet from each other , they are able to print out the uuid,major,minor and rssi value of the received packets. My nexten-USTelligent Community 13Fri, 23 Sep 2016 10:28:52 GMTRE: changing the advertisement packet of ibeacon to include scanned uuid/mac address and rssi valuehttps://devzone.nordicsemi.com/thread/63576?ContentTypeID=1Fri, 23 Sep 2016 10:28:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fe9d7120-2524-4e37-9797-5f1ff4aeceafEinar Thorsrud<p>According to the <a href="https://developer.apple.com/ibeacon/">iBeacon specification</a> the only application specific data is the Major and Minor numbers, each 2 bytes. You cannot put your application specific data in any other part of the advertisement packet. That means that you can only fit in total 4 bytes, so you are not able to fit the full 6 byte MAC address plus the RSSI. You could part of the MAC address however, which may be significantly &quot;unique&quot; for your use case.</p><div style="clear:both;"></div>