Ok I have setup a simple gui for uart. I am trying to light up 4 LEDS thru a MC. LED0 will be 0x01, LED 1, 2, 3 will be 2, 4, 8. Will this send out the appropriate command I am looking for. This will have to be sent out through TxD. I have no way to test it until tomorrow because I do not have the hardware with me but was wondering if this would suffice. I do not get any errors or warnings so I am thinking it should. Thanks

#region Buttons

    private void buttonLED0\_Click\_1(object sender, EventArgs e)
    {
        Data = Data ^= 0x01;
        int BytesToWrite = Data;
        int bytes = serialPort1.BytesToWrite;
        //UInt32 numBytesWritten = 1;
        buttonLED0.Enabled = !buttonLED0.Enabled;
        
        if (buttonLED0.Enabled)
        {
            pictureBoxLED0.BackgroundImage = imageList1.Images\[(int)LEDColor.GreenOn\];
        }

        if (!buttonLED0.Enabled)
        {
            
            pictureBoxLED0.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOn\];
        } 
    }

By the way this will have to be sent out thru the TXD.

Ok I have setup a simple gui for uart. I am trying to light up 4 LEDS thru a MC. LED0 will be 0x01, LED 1, 2, 3 will be 2, 4, 8. Will this send out the appropriate command I am looking for. I have no way to test it until tomorrow because I do not have the hardware with me but was wondering if this would suffice. I do not get any errors or warnings so I am thinking it should. Thanks

private void buttonLED0_Click_1(object sender, EventArgs e)
{
Data = Data ^= 0x01;
int BytesToWrite = Data;
int bytes = serialPort1.BytesToWrite;
//UInt32 numBytesWritten = 1;
buttonLED0.Enabled = !buttonLED0.Enabled;

        if (buttonLED0.Enabled)
        {
            pictureBoxLED0.BackgroundImage = imageList1.Images\[(int)LEDColor.GreenOn\];
        }

        if (!buttonLED0.Enabled)
        {
            
            pictureBoxLED0.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOn\];
        } 
    }

any help would be good?

I am building a GUI for a UART to communicate to a MC and then to a I/O expander. Right now I have the data going thru the RTS and DTS and my switches monitored by CTS DSR DCD and RI. How could I change this to be implemented to use only TX and RX for all of this without having to start all over. I am not real great with programming but I do know enough to understand. I have included the piece of code that I use for this part.

 #region Initialization
    public enum LEDColor { RedOn, RedOff, GreenOn, GreenOff }

    private bool RTSState = false;
    private bool DTRState = false;
    private bool RingIndicator = false;

    public Form1()
    {
        InitializeComponent();

        pictureBoxRTS.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOff\];
        pictureBoxDTR.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOff\];
        pictureBoxCTS.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOff\];
        pictureBoxDSR.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOff\];
        pictureBoxDCD.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOff\];
        pictureBoxRI.BackgroundImage = imageList1.Images\[(int)LEDColor.RedOff\];
    }
    #endregion


    #region Modem lines
    // Show the modem states on the virtual LEDs
    private void serialPort1\_PinChanged(object sender, System.IO.Ports.SerialPinChangedEventArgs e)
    {
        // Toggle RI since we can't determine the state with the SerialPort class
        if (e.EventType == SerialPinChange.Ring) RingIndicator = !RingIndicator;

        showCTS\_DSR\_CD();
    }

    private void showCTS\_DSR\_CD()
    {
        if (serialPort1.IsOpen)
        {
            if (serialPort1.CtsHolding) this.pictureBoxCTS.BackgroundImage = this.imageList1.Images\[(int)LEDColor.GreenOn\];
            else this.pictureBoxCTS.BackgroundImage = this.imageList1.Images\[(int)LEDColor.RedOn\];

            if (serialPort1.DsrHolding) this.pictureBoxDSR.BackgroundImage = this.imageList1.Images\[(int)LEDColor.GreenOn\];
            else this.pictureBoxDSR.BackgroundImage = this.imageList1.Images\[(int)LEDColor.RedOn\];

            if (serialPort1.CDHolding) this.pictureBoxDCD.BackgroundImage = this.imageList1.Images\[(int)LEDColor.GreenOn\];
            else this.pictureBoxDCD.BackgroundImage = this.imageList1.Images\[(int)LEDColor.RedOn\];

            if (RingIndicator) this.pict