MissionPlanner.Sikradio.upload_xmodem C# (CSharp) Method

        bool upload_xmodem(ICommsSerial comPort)
        {
            // try xmodem mode
            // xmodem - short cts to ground
            try
            {
                uploader_LogEvent("Trying XModem Mode");
                //comPort.BaudRate = 57600;
                comPort.BaudRate = MainV2.comPort.BaseStream.BaudRate;
                comPort.ReadTimeout = 1000;

                Thread.Sleep(2000);
                var tempd = comPort.ReadExisting();
                Console.WriteLine(tempd);
                comPort.Write("U");
                Thread.Sleep(1000);
                var resp1 = Serial_ReadLine(comPort); // echo
                var resp2 = Serial_ReadLine(comPort); // echo 2
                var tempd2 = comPort.ReadExisting(); // posibly bootloader info / use to sync
                // identify
                comPort.Write("i");
                // responce is rfd900....
                var resp3 = Serial_ReadLine(comPort); //echo
                var resp4 = Serial_ReadLine(comPort); // newline
                var resp5 = Serial_ReadLine(comPort); // bootloader info
                uploader_LogEvent(resp5);
                if (resp5.Contains("RFD900"))
                {
                    // start upload
                    comPort.Write("u");
                    var resp6 = Serial_ReadLine(comPort); // echo
                    var resp7 = Serial_ReadLine(comPort); // Ready
                    if (resp7.Contains("Ready"))
                    {
                        comPort.ReadTimeout = 3500;
                        // responce is C
                        var isC = comPort.ReadByte();
                        var temp = comPort.ReadExisting();
                        if (isC == 'C')
                        {
                            if (getFirmwareLocal())
                            {

                                XModem.LogEvent += uploader_LogEvent;
                                XModem.ProgressEvent += uploader_ProgressEvent;
                                // start file send
                                XModem.Upload(firmwarefile,
                                    comPort);
                                XModem.LogEvent -= uploader_LogEvent;
                                XModem.ProgressEvent -= uploader_ProgressEvent;
                                return true;
                            }
                            return false;
                        }
                    }
                }
            }
            catch (Exception ex2)
            {
                log.Error(ex2);
            }

            return false;
        }