BLE unable to connect

RE: BLE unable to connect

RVM — Tue, 12 Jan 2021 02:05:22 GMT

I am seeing a similar behavior when trying to connect to my peripheral device via nRF Connect on an Android phone.

My set up:
    SDK 15.3.0,
    SD version 6.1.1,
    nRF52832

RE: BLE unable to connect

Jared — Wed, 07 Aug 2019 11:00:58 GMT

Hi,

[quote user="chkan"]The connection doesn't fail but it appearing to be connecting for a long time but it never gets connected. [/quote]

Do you get the BLE_GAP_EVT_CONNECTED event, and how do you handle ble connection events in the ble handler? A sniffer trace of the connection would clarify what really happens. Could you take a nrf sniffer trace of the connection and upload it here?

regards

Jared

RE: BLE unable to connect

KCY — Mon, 05 Aug 2019 16:39:45 GMT

It is advertising in fast mode. I have the advertising_init() and advertising_init() shown below:

static void advertising_init(void)
{
    ret_code_t             err_code;
    ble_advertising_init_t init;

    memset(&init, 0, sizeof(init));

    init.advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance      = true;
    init.advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
    init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
    init.advdata.uuids_complete.p_uuids  = m_adv_uuids;

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_DURATION;

    init.evt_handler = on_adv_evt;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}


static void advertising_start(void * p_erase_bonds)
{
    bool erase_bonds = *(bool*)p_erase_bonds;

    if (erase_bonds)
    {
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
    }
    else
    {
        ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);
    }
}

The connection doesn't fail but it appearing to be connecting for a long time but it never gets connected. This is the log after I cancel the connection manually.

RE: BLE unable to connect

Jared — Mon, 05 Aug 2019 07:32:35 GMT

Hi,

What mode is the peripheral advertising in? What error is shown in the nRF Connect log when connection establishment fails?

regards

Jared