https://devzone.nordicsemi.com/f/nordic-q-a/19880/acknoweledge-of-advertisement-dataHi team, Iam using sdk12.1.0(ble_app_beacon and ble_app_hrs_c) , i modified the advertising data and sending to other end.other end one scanner is receiving the data .but some times packets are missing.Is there any function to check error or givingen-USTelligent Community 13Tue, 21 Feb 2017 17:26:09 GMThttps://devzone.nordicsemi.com/thread/77365?ContentTypeID=1Tue, 21 Feb 2017 17:26:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:726782d5-31a1-4a60-b67f-e567b4b42aa8endnode<p>Hi mani,</p> <p>Advertisement is unacknowledged (unreliable) communication channel so there is no ACK from scanner&#39;s side. If you want to transport data reliably you should use connection-based BLE link (or if you really don&#39;t want that you need to define custom data formats on top of ADV packets so it could work as CMD-RSP communication with acknowledgement/error detection mechanisms).</p> <p>Cheers Jan</p><div style="clear:both;"></div>