//convert to type of GPSData from TBody
        public GPSData ToGPSData(TBody body)
        {
            GPSData data = new GPSData();

            data.id                = GetIssi(body);
            data.nMsRSSI           = body.nMsRSSI;
            data.nULRSSI           = body.nULRSSI;
            data.nBattery          = body.nBattery;
            data.nReasonForSending = body.nReasonForSending;
            //data.time = Convert.ToString(body.time);
            //try
            //{
            //    data.time = DateTime.FromOADate(body.time).ToString("yyyy-MM-dd HH:mm:ss.fff");
            //}
            //catch (Exception e)
            //{
            data.time = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff");
            //}


            return(data);
        }