https://devzone.nordicsemi.com/f/nordic-q-a/53518/which-sd-event-indicates-that-sd-can-be-processedHi, In your nRF5 SDK v16.0.0 release note, I recognize that a new feature is added: I am wondering which BLE event is indicating that SD has been free from BUSY state? Preferably a MSC link to the documentation? Is this a new feature of SD v7en-USTelligent Community 13Tue, 22 Oct 2019 12:05:06 GMThttps://devzone.nordicsemi.com/thread/216158?ContentTypeID=1Tue, 22 Oct 2019 12:05:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:865aa2af-6be2-45bf-8fd1-fe8a5d333dd4Chencheng<p>Thank you very much!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/216154?ContentTypeID=1Tue, 22 Oct 2019 11:58:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4b33eec4-316b-4378-8bd3-e4f8da5337b7Sigurd<p>Hi,</p> [quote userid="75407" url="~/f/nordic-q-a/53518/which-sd-event-indicates-that-sd-can-be-processed"]I am wondering which BLE event is indicating that SD has been free from BUSY state? Preferably a MSC link to the documentation?[/quote] <p>You can read more about the GATT Queue library at <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_ble_gatt_queue.html?cp=5_1_3_2_10">this link.</a></p> <p>Different functions will generate different events, e.g&nbsp;<span>sd_ble_gattc_read() will generate&nbsp;BLE_GATTC_EVT_READ_RSP when the&nbsp;procedure is done. And e.g.&nbsp;sd_ble_gattc_primary_services_discover() will generate a&nbsp;BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP event.</span></p> [quote userid="75407" url="~/f/nordic-q-a/53518/which-sd-event-indicates-that-sd-can-be-processed"]Is this a new feature of SD v7.x compare with SD v6.x?[/quote] <p>No. This is a library in the SDK.</p><div style="clear:both;"></div>