ADD UUID 128 custom service to advertising packet

[annapalu]

Hi all,

is there an example to add the uuid 128 of a custom service on advertising data?

[Jørgen Holmefjord]

Hi,

The BLE UART example shows how to add a custom UUID to the scan response data. You can also find a detailed explanation of how you do this in the BLE Services, a beginner's tutorial. Note that you can add it to the advertising data if you have enough available space, but the maximum payload of one advertising packet is 27 bytes.

Best regards,

Jørgen

[annapalu]

Hi jorgen,

thanks for the answer. i see the uart example, it's very simple.

static ble_uuid_t                       m_adv_uuids[] = {{BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};  

/**< Universally unique service identifier. */

/**@brief Function for initializing the Advertising functionality.
 */

static void advertising_init(void)
{
    uint32_t               err_code;
    ble_advdata_t          advdata;
    ble_advdata_t          scanrsp;
    ble_adv_modes_config_t options;

// Build advertising data struct to pass into @ref ble_advertising_init.
memset(&advdata, 0, sizeof(advdata));
advdata.name_type          = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance = false;
advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

memset(&scanrsp, 0, sizeof(scanrsp));
scanrsp.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
scanrsp.uuids_complete.p_uuids  = m_adv_uuids;

memset(&options, 0, sizeof(options));
options.ble_adv_fast_enabled  = true;
options.ble_adv_fast_interval = APP_ADV_INTERVAL;
options.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;

err_code = ble_advertising_init(&advdata, &scanrsp, &options, on_adv_evt, NULL);
APP_ERROR_CHECK(err_code);

}

my problem is the define of BLE_UUID_NUS_SERVICE is not simple 0xXXXX but it's somethink like that

ble_uuid128_t bds_base_uuid = {{0xB6, 0x9D, 0x21, 0x57, 0xA7, 0xA3, 0xFA, 0xA0, 0x97, 0x4A, 0x72, 0xA7, 0x00, 0x00, 0x20, 0xF3}};

and i don't know how meange it