public CharateristicItem AddCharaterisItem(string address, string serviceUUID, string characteristicUUID)
    {
        //Debug.Log("AddCharaterisItem");
        item_demo.gameObject.SetActive(false);
        CharateristicItem i = MonoBehaviour.Instantiate(item_demo);

        i.Init(address, serviceUUID, characteristicUUID);
        i.transform.SetParent(item_demo.transform.parent);

        i.gameObject.SetActive(true);
        i.transform.localScale = Vector3.one;
        G.Add(i.gameObject);

        return(i);
    }