Dear Nordic
I use nRF5 SDK BLE_Central / uart to connect our custom peripherals by address, and I found that it seem need to 4~5 seconds to finish connecting
Here is the log. Is there any way to improve the connection speed?
Thanks
[00:00:05.637,329] <debug> ble_scan: Connecting [00:00:05.637,329] <debug> ble_scan: Connection status: 0 [00:00:06.145,446] <debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0. [00:00:06.145,507] <info> app: Connecting to target E11xxxxxxx [00:00:06.145,568] <debug> nrf_ble_gq: Registering connection handle: 0x0000 [00:00:06.145,629] <debug> app: conn set to 4dBm successfully [00:00:06.326,904] <debug> nrf_ble_gatt: Data length updated to 27 on connection 0x0. [00:00:06.326,904] <debug> nrf_ble_gatt: max_rx_octets: 27 [00:00:06.326,904] <debug> nrf_ble_gatt: max_tx_octets: 27 [00:00:06.326,904] <debug> nrf_ble_gatt: max_rx_time: 328 [00:00:06.326,965] <debug> nrf_ble_gatt: max_tx_time: 328 [00:00:07.345,642] <debug> app: Requesting to update ATT MTU to 247 bytes on connection 0x0. [00:00:07.586,975] <debug> nrf_ble_gatt: ATT MTU updated to 247 bytes on connection 0x0 (response). [00:00:07.586,975] <info> app: ATT MTU exchange completed. [00:00:07.586,975] <info> app: Ble NUS max data length set to 0xF4(244) [00:00:07.586,975] <debug> nrf_ble_gq: Processing the request queue... [00:00:07.845,825] <debug> ble_db_disc: Starting discovery of service with UUID 0xAE30 on connection handle 0x0. [00:00:07.845,825] <debug> nrf_ble_gq: Adding item to the request queue [00:00:07.845,825] <debug> nrf_ble_gq: GATTC Primary Services Discovery Request [00:00:07.845,886] <debug> nrf_ble_gq: SD GATT procedure (2) succeeded on connection handle: 0. [00:00:08.846,984] <debug> ble_db_disc: Found service UUID 0xAE30. [00:00:08.846,984] <debug> nrf_ble_gq: Adding item to the request queue [00:00:08.846,984] <debug> nrf_ble_gq: GATTC Characteristic Discovery Request [00:00:08.847,045] <debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0. [00:00:08.847,045] <debug> nrf_ble_gq: Processing the request queue... [00:00:08.967,773] <debug> nrf_ble_gq: Adding item to the request queue [00:00:08.967,773] <debug> nrf_ble_gq: GATTC Characteristic Descriptor Request [00:00:08.967,834] <debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0. [00:00:08.967,834] <debug> nrf_ble_gq: Processing the request queue... [00:00:09.086,975] <debug> nrf_ble_gq: Adding item to the request queue [00:00:09.086,975] <debug> nrf_ble_gq: GATTC Characteristic Descriptor Request [00:00:09.087,036] <debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0. [00:00:09.087,036] <debug> nrf_ble_gq: Processing the request queue... [00:00:09.206,970] <debug> nrf_ble_gq: Adding item to the request queue [00:00:09.207,031] <debug> nrf_ble_gq: GATTC Characteristic Descriptor Request [00:00:09.207,031] <debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0. [00:00:09.207,092] <debug> nrf_ble_gq: Processing the request queue... [00:00:09.326,965] <debug> ble_db_disc: Discovery of service with UUID 0xAE30 completed with success on connection handle 0x0. [00:00:09.327,026] <info> app: Discovery complete. [00:00:09.327,026] <debug> nrf_ble_gq: Adding item to the request queue [00:00:09.327,026] <debug> nrf_ble_gq: GATTC Write Request [00:00:09.327,087] <debug> nrf_ble_gq: SD GATT procedure (1) succeeded on connection handle: 0. [00:00:09.327,087] <debug> nrf_ble_gq: Adding item to the request queue [00:00:09.327,148] <debug> nrf_ble_gq: GATTC Write Request [00:00:09.327,148] <debug> nrf_ble_gq: SD is currently busy. The GATT request procedure will be attempted again later. [00:00:09.327,148] <debug> nrf_ble_gq: Pointer to allocated memory block: 0x20009798. [00:00:09.327,148] <debug> nrf_ble_gq: Processing the request queue... [00:00:09.327,209] <debug> nrf_ble_gq: GATTC Write Request [00:00:09.327,209] <debug> nrf_ble_gq: SD is currently busy. The GATT request procedure will be attempted again later. [00:00:09.327,209] <info> app: Connected to device with Nordic UART Service. [00:00:09.327,514] <debug> nrf_ble_gq: Processing the request queue... [00:00:09.327,514] <debug> nrf_ble_gq: GATTC Write Request [00:00:09.327,514] <debug> nrf_ble_gq: SD is currently busy. The GATT request procedure will be attempted again later. [00:00:09.327,575] <debug> nrf_ble_gq: Processing the request queue... [00:00:09.327,575] <debug> nrf_ble_gq: GATTC Write Request [00:00:09.327,575] <debug> nrf_ble_gq: Pointer to freed memory block: 0x20009798. [00:00:09.327,575] <debug> nrf_ble_gq: SD GATT procedure (1) succeeded on connection handle: 0. [00:00:09.327,575] <debug> nrf_ble_gq: Processing the request queue...
