Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

RE: Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

tesc — Mon, 04 Dec 2023 12:37:06 GMT

Hi,

Thanks for sharing!

I did a diff, to see what was changed, and see that all needed was adding one line and slightly changing another line. So for anyone wanting to do the same:

Store the advertising type at the beginning of ble_advertising_start() with

uint8_t properties_type = p_advertising->adv_params.properties.type;

then after initializing advertising parameters with default values instead of

p_advertising->adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;

you instead use the type stored from earlier:

p_advertising->adv_params.properties.type = properties_type;

That way, you can still use the advertising module also for non-connectable advertising.

Regards,
Terje

RE: Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

Terry — Mon, 04 Dec 2023 01:54:51 GMT

I updated the code as below:

uint32_t ble_advertising_start(ble_advertising_t * const p_advertising,

                                      ble_adv_mode_t            advertising_mode)

{

    uint32_t ret;

    uint8_t properties_type = p_advertising->adv_params.properties.type;



    if (p_advertising->initialized == false)

    {

        return NRF_ERROR_INVALID_STATE;

    }



    p_advertising->adv_mode_current = advertising_mode;



    memset(&p_advertising->peer_address, 0, sizeof(p_advertising->peer_address));



    if (  ((p_advertising->adv_modes_config.ble_adv_directed_high_duty_enabled) && (p_advertising->adv_mode_current == BLE_ADV_MODE_DIRECTED_HIGH_DUTY))

        ||((p_advertising->adv_modes_config.ble_adv_directed_enabled)           && (p_advertising->adv_mode_current == BLE_ADV_MODE_DIRECTED_HIGH_DUTY))

        ||((p_advertising->adv_modes_config.ble_adv_directed_enabled)           && (p_advertising->adv_mode_current == BLE_ADV_MODE_DIRECTED))

       )

    {

        if (p_advertising->evt_handler != NULL)

        {

            p_advertising->peer_addr_reply_expected = true;

            p_advertising->evt_handler(BLE_ADV_EVT_PEER_ADDR_REQUEST);

        }

        else

        {

            p_advertising->peer_addr_reply_expected = false;

        }

    }



    p_advertising->adv_mode_current = adv_mode_next_avail_get(p_advertising, advertising_mode);



    // Fetch the whitelist.

    if ((p_advertising->evt_handler != NULL) &&

        (p_advertising->adv_mode_current == BLE_ADV_MODE_FAST || p_advertising->adv_mode_current == BLE_ADV_MODE_SLOW) &&

        (p_advertising->adv_modes_config.ble_adv_whitelist_enabled) &&

        (!p_advertising->whitelist_temporarily_disabled))

    {

        p_advertising->whitelist_in_use         = false;

        p_advertising->whitelist_reply_expected = true;

        p_advertising->evt_handler(BLE_ADV_EVT_WHITELIST_REQUEST);

    }

    else

    {

        p_advertising->whitelist_reply_expected = false;

    }



    // Initialize advertising parameters with default values.

    memset(&p_advertising->adv_params, 0, sizeof(p_advertising->adv_params));



    p_advertising->adv_params.properties.type = properties_type;



    // Use 1MBIT as primary phy if no phy was selected.

    if (phy_is_valid(&p_advertising->adv_modes_config.ble_adv_primary_phy))

    {

        p_advertising->adv_params.primary_phy = p_advertising->adv_modes_config.ble_adv_primary_phy;

    }

    else

    {

        p_advertising->adv_params.primary_phy = BLE_GAP_PHY_1MBPS;

    }



    if (p_advertising->adv_modes_config.ble_adv_extended_enabled)

    {

        // Use 1MBIT as secondary phy if no phy was selected.

        if (phy_is_valid(&p_advertising->adv_modes_config.ble_adv_secondary_phy))

        {

            p_advertising->adv_params.secondary_phy = p_advertising->adv_modes_config.ble_adv_secondary_phy;

        }

        else

        {

            p_advertising->adv_params.secondary_phy = BLE_GAP_PHY_1MBPS;

        }

    }

    p_advertising->adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;



    // Set advertising parameters and events according to selected advertising mode.

    switch (p_advertising->adv_mode_current)

    {

        case BLE_ADV_MODE_DIRECTED_HIGH_DUTY:

            ret = set_adv_mode_directed_high_duty(p_advertising, &p_advertising->adv_params);

            break;



        case BLE_ADV_MODE_DIRECTED:

            ret = set_adv_mode_directed(p_advertising, &p_advertising->adv_params);

            break;



        case BLE_ADV_MODE_FAST:

            ret = set_adv_mode_fast(p_advertising, &p_advertising->adv_params);

            break;



        case BLE_ADV_MODE_SLOW:

            ret = set_adv_mode_slow(p_advertising, &p_advertising->adv_params);

            break;



        case BLE_ADV_MODE_IDLE:

            p_advertising->adv_evt = BLE_ADV_EVT_IDLE;

            break;



        default:

            break;

    }



    if (p_advertising->adv_mode_current != BLE_ADV_MODE_IDLE)

    {



        ret = sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, p_advertising->p_adv_data, &p_advertising->adv_params);

        if (ret != NRF_SUCCESS)

        {

            return ret;

        }

        ret = sd_ble_gap_adv_start(p_advertising->adv_handle, p_advertising->conn_cfg_tag);



        if (ret != NRF_SUCCESS)

        {

            return ret;

        }

    }



    if (p_advertising->evt_handler != NULL)

    {

        p_advertising->evt_handler(p_advertising->adv_evt);

    }



    return NRF_SUCCESS;

}

RE: Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

tesc — Fri, 01 Dec 2023 09:51:25 GMT

Hi,

Do you mind sharing what you did to fix this?

Regards,
Terje

RE: Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

Terry — Fri, 01 Dec 2023 03:22:25 GMT

Hi All,

Finally, I updated ble_advertising.c and fixed this issue. Also, I reverted NRF_SDH_BLE_PERIPHERAL_LINK_COUNT to 1 and NRF_SDH_BLE_TOTAL_LINK_COUNT to 1.

Thanks

RE: Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

Terry — Thu, 30 Nov 2023 02:09:58 GMT

Hi Turbo J,

Thanks for your information.

I updated NRF_SDH_BLE_PERIPHERAL_LINK_COUNT to 2 and NRF_SDH_BLE_TOTAL_LINK_COUNT to 2 and rebuilt the FW.

It seems OK. However, if the second advertisement (non-connectable) is tried to connect by another central device, there is a fatal error raised.

For my application, I only need one connection.

Please advise. Thanks!

RE: Got an error (err_code is 18) when I started the non-connectable advertising at the event 'BLE_GAP_EVT_CONNECTED'

Turbo J — Wed, 29 Nov 2023 12:25:16 GMT

You would need to configure the softdevice for 2 peripherial connections, that is why you got the NRF_ERROR_CONN_COUNT error.

Try increasing NRF_SDH_BLE_PERIPHERAL_LINK_COUNT and NRF_SDH_BLE_TOTAL_LINK_COUNT. This will consume more RAM for the sd.