CommunicationsTask.cs

public void CommunicationsTask(bool blnOnlyCheckXmitQueue)
{
    try
    {
        if (serialPort1.IsOpen)
        {
            if (blnCommEnabled)
            {
                if (!blnWaitingForResponse)
                {
                    if (!blnOnlyCheckXmitQueue)
                    {
                        if (0 == MsgQueue.Count)
                        {
                            if (!blnOnline)
                            {
                                // Send a thing
                            }
                            else
                            {
                                if (!blnDataUploadInProgress)
                                {
                                    switch (Program.frmMain.GetCurrentTab())
                                    {
                                        case 0:
                                            // Do some work
                                            break;

                                        case 1:
                                            // Do some work
                                            break;

                                        case 2:
                                            // Do some work
                                            break;

                                        case 3:
                                            // Do some work
                                            break;

                                        default:
                                            break;
                                    }
                                }
                            }
                        }
                    }

                    if (0 != MsgQueue.Count)
                    {
                        if (SendMsg(MsgQueue.Peek()))
                        {
                            blnWaitingForResponse = true;
                            timer2.Enabled = true;
                        }
                    }
                }
            }
        }
    }

    catch (Exception)
    {
        MsgQueue.Clear();
        blnWaitingForResponse = true;
        timer2.Enabled = true;
    }

}