Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

RE: Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

Macl — Mon, 07 Sep 2020 06:48:15 GMT

I have ajusted the order as you suggested. It works. I connect and pair successfully!

Thank you!

RE: Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

Vidar Berg — Mon, 07 Sep 2020 06:26:17 GMT

I see, so you are trying to iniate pairing from your device. I think maybe the reason it disconnects is that you're calling on_pair() from the BLE_GAP_EVT_PHY_UPDATE event. Do you get the same disconnect reason (0x2A - BLE_HCI_DIFFERENT_TRANSACTION_COLLISION) if you uncomment on_pair() from BLE_GAP_EVT_CONNECTED and remove the update_phy() request?

Message sequence chart for reference:

Pairing: Just Works

RE: Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

Macl — Mon, 07 Sep 2020 03:47:14 GMT

basically , the sequence is connect -- update_phy to 2M --- on_pair --- event BLE_GAP_EVT_SEC_PARAMS_REQUEST --- Fail(disconnect) or Success(receive event BLE_GAP_EVT_CONN_SEC_UPDATE).

Mine is disconnect

RE: Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

Macl — Mon, 07 Sep 2020 03:40:49 GMT

I'm sorry. I didn't say it clearly, I add connect, pair to it.

err_code = sd_ble_gap_connect(m_adapter, &(p_ble_gap_evt->params.adv_report.peer_addr),
                                      &m_scan_param, &m_connection_param
#if NRF_SD_BLE_API >= 5
                                      ,
            m_config_id // m_config_id //BLE_CONN_CFG_TAG_DEFAULT
                                          //can't receive notice when it is set to be BLE_CONN_CFG_TAG_DEFAULT(0)
#endif
        );

case BLE_GAP_EVT_CONNECTED:
        on_connected(&(p_ble_evt->evt.gap_evt));
        /*on_pair(&(p_ble_evt->evt.gap_evt));*/
        update_phy(&(p_ble_evt->evt.gap_evt));
        break;

case BLE_GAP_EVT_PHY_UPDATE:
        on_phy_update(&(p_ble_evt->evt.gap_evt));
        on_pair(&(p_ble_evt->evt.gap_evt));
        break;
    
static void on_pair(const ble_gap_evt_t *const p_ble_gap_evt)
{
    printf("\non_pairing\n");
    fflush(stdout);
    /*err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);*/
    uint16_t m_conn_handle = p_ble_gap_evt->conn_handle;

    ble_gap_sec_params_t params;
    params.bond     = 0; // 1 to bond, 0 to pair?
    params.mitm     = 0;
    params.lesc     = 0;
    params.keypress = 0;
    params.io_caps =
        BLE_GAP_IO_CAPS_NONE; // BLE_GAP_IO_CAPS_NONE; //
                              // BLE_GAP_IO_CAPS_KEYBOARD_DISPLAY;BLE_GAP_IO_CAPS_KEYBOARD_ONLY
    params.oob             = 0;
    params.min_key_size    = 7;
    params.max_key_size    = 16;
    params.kdist_own.enc   = 1;
    params.kdist_own.id    = 1;
    params.kdist_own.link  = 0;
    params.kdist_own.sign  = 0;
    params.kdist_peer.enc  = 1;
    params.kdist_peer.id   = 1;
    params.kdist_peer.link = 0;
    params.kdist_peer.sign = 0;

    uint32_t nResult = -1;
    nResult          = sd_ble_gap_authenticate(m_adapter, m_conn_handle, &params);
    printf("pair status is %d\n", nResult);
}

I can receive event BLE_GAP_EVT_SEC_PARAMS_REQUEST after on_pair(). But it will disconnect as I had said it before.

RE: Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

Vidar Berg — Fri, 04 Sep 2020 11:18:31 GMT

Hi,

Support for pairing and bonding is not implemented in the sample code. Unless this is required I would recommend you try responding with 'BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP' to reject the request:

error_code1 = sd_ble_gap_sec_params_reply(adapter, p_ble_evt->evt.common_evt.conn_handle,
BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP,
NULL, NULL);

RE: Can not receive event BLE_GAP_EVT_CONN_SEC_UPDATE after I called sd_ble_gap_sec_params_reply within event BLE_GAP_EVT_SEC_PARAMS_REQUEST.

Macl — Fri, 04 Sep 2020 07:11:35 GMT

It can receive event BLE_GAP_EVT_CONN_SEC_UPDATE if I change m_config_id from 1 to 0. But it can't receive notification from BLE remote since then.

err_code = sd_ble_gap_connect(m_adapter, &(p_ble_gap_evt->params.adv_report.peer_addr),
                                      &m_scan_param, &m_connection_param
#if NRF_SD_BLE_API >= 5
                                      ,
            m_config_id // m_config_id //BLE_CONN_CFG_TAG_DEFAULT
                                          //can't receive notice when it is set to be BLE_CONN_CFG_TAG_DEFAULT(0)
#endif
        );