https://devzone.nordicsemi.com/f/nordic-q-a/16694/crc-bytes-in-advertising-dataHello, I am implementing a central which is scanning for advertising packets using s130, SDK11, nRF51822 and based on example ble_app_hrs_rscs_relay. I get the advertising packets in function static void on_ble_central_evt(const ble_evt_t * consten-USTelligent Community 13Tue, 27 Sep 2016 12:28:32 GMThttps://devzone.nordicsemi.com/thread/63879?ContentTypeID=1Tue, 27 Sep 2016 12:28:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fa3416a4-04ba-4f3b-8f02-87a73294e99cRK<p>well you can always recalculate the CRC, or just use any hashing function you like to make a hash of the advertising data.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/63878?ContentTypeID=1Tue, 27 Sep 2016 12:26:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7888c688-e67b-4063-b42e-f47d79cc4786dblasco<p>I need them to know which advertising packets I have received and which not. I am building multiple devices acting as repeaters (they will advertise data that have heared). But I don&#39;t want to advertise the same data again, and I was planning to keep a database of CRCs to know which messages I have received.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/63877?ContentTypeID=1Tue, 27 Sep 2016 11:46:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:65d4ed81-c8d2-48f2-a198-cea1620aef80RK<p>You can&#39;t get them - they are there as a checksum on the packet and stripped off before the data is passed to your application.</p> <p>Why do you want them?</p><div style="clear:both;"></div>