BLE_GAP_EVT_SEC_REQUEST event missing?

Question

Hello everyone, 
 
 1st of all, thank you for taking your time to have a look over my "problem". 
 
 I have a device that I am working on, that acts as aperipheral, it is a non NRF one. 
 I also have a NRF52DK that I am using to develop the central device for my peripheral. 
 In the central (NRF52DK), for connection, I am scanning for Local Name (shortened local name never works for me). 
 Immediately after a connection is estabilished, from peripheral I issue a BLE_GAP_EVT_SEC_REQUEST, that is visible on the sniffer log, but I seem to get no event in the central device at ble_evt_handler level. 
 
 Probably I am completely missing something, but please, can anyone help me out finding out what am I missing? 
 
 Thank you in advance, 
 Victor

Susheel Nuguru · Answer

Changing #define NRF_LOG_DEFAULT_LEVEL 4 in sdk_config.h file and using unchanged main.c file you attached.

changing the name and adding authenticate in blinky peripheral example at the connected event as below

        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected");
            bsp_board_led_on(CONNECTED_LED);
            bsp_board_led_off(ADVERTISING_LED);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
            APP_ERROR_CHECK(err_code);
            err_code = app_button_enable();
            APP_ERROR_CHECK(err_code);

            sd_ble_gap_authenticate(m_conn_handle, &sec_params );
            break;

I get the event you said is missing in your end.

<debug> nrf_ble_gq: Registering connection handle: 0x0000
<debug> ble_db_disc: Starting discovery of service with UUID 0x1523 on connection handle 0x0.
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Primary Services Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (2) succeeded on connection handle: 0.
<debug> app: security requested
<debug> ble_db_disc: Found service UUID 0x1523.
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Discovery Request
<debug> nrf_ble_gq: SD GATT procedure (3) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Descriptor Request
<debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Characteristic Descriptor Request
<debug> nrf_ble_gq: SD GATT procedure (4) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> ble_db_disc: Discovery of service with UUID 0x1523 completed with success on connection handle 0x0.
<debug> ble_lbs_c: LED Button Service discovered at peer.
<info> app: LED Button service discovered on conn_handle 0x0.
<debug> ble_lbs_c: Configuring CCCD. CCCD Handle = 14, Connection Handle = 0
<debug> nrf_ble_gq: Adding item to the request queue
<debug> nrf_ble_gq: GATTC Write Request
<debug> nrf_ble_gq: SD GATT procedure (1) succeeded on connection handle: 0.
<debug> nrf_ble_gq: Processing the request queue...
<debug> nrf_ble_gq: Processing the request queue...

BLE_GAP_EVT_SEC_REQUEST event missing?

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