MissionPlanner.Sikradio.doCommand C# (CSharp) Method

        public string doCommand(ICommsSerial comPort, string cmd, bool multiLineResponce = false, int level = 0)
        {
            if (!comPort.IsOpen)
                return "";

            comPort.DiscardInBuffer();

            lbl_status.Text = "Doing Command " + cmd;
            log.Info("Doing Command " + cmd);

            comPort.Write(cmd + "\r\n");

            comPort.ReadTimeout = 1000;

            // command echo
            var cmdecho = Serial_ReadLine(comPort);

            if (cmdecho.Contains(cmd))
            {
                var value = "";

                if (multiLineResponce)
                {
                    var deadline = DateTime.Now.AddMilliseconds(1000);
                    while (comPort.BytesToRead > 0 || DateTime.Now < deadline)
                    {
                        try
                        {
                            value = value + Serial_ReadLine(comPort);
                        }
                        catch
                        {
                            value = value + comPort.ReadExisting();
                        }
                    }
                }
                else
                {
                    value = Serial_ReadLine(comPort);

                    if (value == "" && level == 0)
                    {
                        return doCommand(comPort, cmd, multiLineResponce, 1);
                    }
                }

                log.Info(value.Replace('\0', ' '));

                return value;
            }

            comPort.DiscardInBuffer();

            // try again
            if (level == 0)
                return doCommand(comPort, cmd, multiLineResponce, 1);

            return "";
        }