public static void Disconnect()
        {
            if (ComPort.IsOpen())
            {
                if (ComPort.Disconnect())
                {
                }
                else
                {
                    throw new Exception("Comport was unable to disconnect");
                }
            }

            if (Doctor != null && Doctor.Connected)
            {
                NetHelper.SendNetCommand(Doctor, new NetCommand(NetCommand.CommandType.LOGOUT, Session));
                Loggedin = false;
                running  = false;
                Doctor.Close();
                Doctor = null;
            }
        }
        public static bool Connect(string comport, string name, string password, out string error)
        {
            error = "Succes";

            if (!ComPort.IsOpen())
            {
                if (ComPort.Connect(comport))
                {
                    ComPort.Write("RS");
                    string temp = ComPort.Read();
                    if (temp == "err")
                    {
                        ComPort.Disconnect();
                        error = "De Ergometer is niet verbonden";
                        return(false);
                    }
                    Thread.Sleep(200);
                    ComPort.Write("CM");
                    ComPort.Read();
                    Thread.Sleep(200);

                    ComPort.Write("ST");
                    string response = ComPort.Read();

                    SaveMeting(response);
                }
                else
                {
                    error = "De ergometer is niet verbonden";
                    return(false);
                }
            }

            if (Doctor == null || !Doctor.Connected)
            {
                if (Doctor == null)
                {
                    Doctor = new TcpClient();
                }

                try
                {
                    Doctor.Connect(HOST, PORT);
                }
                catch (Exception e)
                {
                    error = "Server is niet online.";
                    return(false);
                }

                Name = name;

                NetCommand net = NetHelper.ReadNetCommand(Doctor);
                if (net.Type == NetCommand.CommandType.SESSION)
                {
                    Session = net.Session;
                }
                else
                {
                    throw new Exception("Session not assigned");
                }

                running = true;

                t = new Thread(run);
                t.IsBackground = true;
                t.Start();
            }

            if (!Loggedin)
            {
                NetCommand command = new NetCommand(name, false, password, Session);
                NetHelper.SendNetCommand(Doctor, command);

                NetCommand response = NetHelper.ReadNetCommand(Doctor);
                if (response.Type == NetCommand.CommandType.RESPONSE && response.Response == NetCommand.ResponseType.LOGINWRONG)
                {
                    Loggedin = false;
                    error    = "De inloggegevens zijn onjuist.";
                    return(false);
                }
                else
                {
                    Loggedin = true;
                }
            }

            return(true);
        }