static void advertising_init(void)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    ble_advdata_t scanrsp;
    ble_advdata_manuf_data_t   manuf_data;
    // Build advertising data struct to pass into @ref ble_advertising_init.
    memset(&advdata,0, sizeof(advdata));
	  //------------------ Newly Added ---------------------------------------------------
		manuf_data.company_identifier = COMPANY_IDENTIFIER;
		manuf_data.data.size          = ADV_ADDL_MANUF_DATA_LEN;
		m_addl_adv_manuf_data[0]=0x11;
		m_addl_adv_manuf_data[1]=0x22;
		m_addl_adv_manuf_data[2]=0x33;
		m_addl_adv_manuf_data[3]=0x44;
		m_addl_adv_manuf_data[4]=0xAA;	
		manuf_data.data.p_data        = m_addl_adv_manuf_data;
	//-------------------------------------------------------------------------------------
    advdata.name_type          = BLE_ADVDATA_FULL_NAME;
    advdata.include_appearance = false;
    advdata.flags              = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
	//-----------------New One------------------------------------------------------------
    advdata.p_manuf_specific_data = &manuf_data;
	//------------------------------------------------------------------------------------
    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;

    ble_adv_modes_config_t options  = {0};
    options.ble_adv_fast_enabled    = BLE_ADV_FAST_ENABLED;
    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);
}