https://devzone.nordicsemi.com/f/nordic-q-a/16581/nrf51-dongle-scan-and-advertise-mbed-codingHi , 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 13Thu, 22 Sep 2016 08:31:33 GMThttps://devzone.nordicsemi.com/thread/63427?ContentTypeID=1Thu, 22 Sep 2016 08:31:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c1d573d2-fb62-482a-8051-9b9ab53d867bPetter Myhre<p>You should use the MANUFACTURER_SPECIFIC_DATA data type. It allows you to put any data you want into the advertising packet. You can have a look at BLE_iBeacon for how it is used.</p><div style="clear:both;"></div>