static void advertising_init(void)
{
    uint32_t      err_code;
    //ble_advdata_t advdata;
    uint8_t       flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
//for scanned response
        //ble_advdata_t scanrsp;
ble_advdata_manuf_data_t srv_data; //service data
        uint8_array_t               data_array;
uint8_t                  data[2];

        data[0]=0;


    ble_uuid_t adv_uuids[] =
    {
        {BLE_UUID_HEART_RATE_SERVICE,         BLE_UUID_TYPE_BLE},
        {BLE_UUID_BATTERY_SERVICE,            BLE_UUID_TYPE_BLE},
        {BLE_UUID_DEVICE_INFORMATION_SERVICE, BLE_UUID_TYPE_BLE}
    };

    // Build and set advertising data.
    memset(&advdata, 0, sizeof(advdata));

    advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    advdata.include_appearance      = true;
    advdata.flags.size              = sizeof(flags);
    advdata.flags.p_data            = &flags;
    advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
    advdata.uuids_complete.p_uuids  = adv_uuids;

    // Initialize advertising parameters (used when starting advertising).
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_IND;
    m_adv_params.p_peer_addr = NULL;                           // Undirected advertisement.
    m_adv_params.fp          = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval    = APP_ADV_INTERVAL;
    m_adv_params.timeout     = APP_ADV_TIMEOUT_IN_SECONDS;

                flag++;

                data[0]=rand();

                data[1]=random_val();
                //data[2]=0x33;
data_array.p_data = data;
data_array.size = sizeof(data);
srv_data.service_uuid = BLE_UUID_HEALTH_THERMOMETER_SERVICE;
srv_data.data = data_array;

 // Initialize advertising scanned parameters (used when starting advertising)
memset(&scanrsp, 0, sizeof(scanrsp));
scanrsp.p_manuf_specific_data = &srv_data;
scanrsp.service_data_count      = 1;


err_code = ble_advdata_set(&advdata, &scanrsp);
APP_ERROR_CHECK(err_code);
}