Serial Communication

Hi guys, I want to know how to use serial communication in VB. I saw a serial port icon in the component section. I want to know the api of the serial port. Hope anyone can teach me or any websites that teach this thx!

Download the 101 Samples for your version of VB.Net

Code:

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    ' This function attempts to open the passed Comm Port. If it is
    '  available, it returns True, else it returns False. To determine
    '  availability a Try-Catch block is used.
    Private Function IsPortAvailable(ByVal ComPort As Integer) As Boolean
        Try
            CommPort.Open(ComPort, 115200, 8, RS232.DataParity.Parity_None, _
                RS232.DataStopBit.StopBit_1, 4096)
            ' If it makes it to here, then the Comm Port is available.
            CommPort.Close()
            Return True
        Catch
            ' If it gets here, then the attempt to open the Comm Port
            '  was unsuccessful.
            Return False
        End Try
    End Function

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what does it mean by download 101 sample? where to download?

Code:

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SerialPort1.BaudRate = 9600
        SerialPort1.DataBits = 8
        SerialPort1.PortName = "COM1"
        SerialPort1.Parity = IO.Ports.Parity.None
        SerialPort1.StopBits = IO.Ports.StopBits.One
        SerialPort1.Open()

        SerialPort1.RtsEnable = True
        i = SerialPort1.CtsHolding

        Label1.Text = "Successfully Connected!"
        If (SerialPort1.RtsEnable) Then
            SerialPort1.Write("1")

            Label3.Text = i
            SerialPort1.WriteLine("1")
        End If
     
        Label2.Text = SerialPort1.WriteBufferSize




        'Label2.Text = SerialPort1.ReadByte



        SerialPort1.Close()

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This is what i wrote. Because the VB studio component have serial port, so ?I use it to do the serial communication. Like this correct to open the serial and write to the serial thanks!

Sure glad you asked this question I been goofing around with doing stuff like this too my question is how do you control the stream using a buffer?

Quote:

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Originally Posted by spiritgate

what does it mean by download 101 sample? where to download?

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Sample programs to help people understand how VS works.

http://msdn.microsoft.com/en-us/bb330936.aspx

see my (dbasnett) here http://www.vbforums.com/showthread.php?t=530790

Do you have the 2008 version?

ya I have 2008 version, oblio, I tried the program but it still doesnt work

Well, download the samples, and TRY some of them. Take our word for it that every one works.

Step thru it line by line (pressing F10) to see HOW it works.

The code that I posted was from the samples, and works.

It checks the COM ports, and sends AT to each to test for modem.