public string AddSensor(int DeviceSerial, int Type, int State, int Tconst, int Temp)
        {
            using (var context = new DevicesEntities())
            {

                Device device = new Device();
                device.DeviceSerial = DeviceSerial;
                device.Type = Type;
                device.State = State;
                device.UserName = "******";

                Sensor sensor = new Sensor();
                sensor.DeviceSerial = DeviceSerial;
                sensor.tconst = Tconst;
                sensor.temperature = Temp;
                try
                {
                    context.Device.Add(device);
                    context.Sensor.Add(sensor);
                    context.SaveChanges();
                }
                catch (Exception ex)
                {
                    return ex.Message;
                }

                return "Sensor" + device.DeviceSerial + "Connected";

            }
        }
        public ActionResult TconstSet(Sensor model)
        {
            using (var context = new DevicesEntities())
            {

                var device = (from entity in context.Sensor
                              where entity.DeviceSerial == model.DeviceSerial
                              select entity).First();

                device.tconst = model.tconst;

                UpdateModel(device);
                context.SaveChanges();
                TcpClient Client = new TcpClient();
                Client.Connect(IPAddress.Parse(IpPort.ip), IpPort.port);

                Socket Sock = Client.Client;
                Sock.Send(MySerialize.serialize(device, typeof(Sensor)));

                Sock.Close();
                Client.Close();
            }

            return RedirectToAction("Index", "Home");
        }