Imports System.IO.Ports
Public Class Form1
Private mySerialPort As New SerialPort
Private comBuffer As Byte()
Private Delegate Sub UpdateFormDelegate()
Private UpdateFormDelegate1 As UpdateFormDelegate
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Try
AddHandler mySerialPort.DataReceived, AddressOf mySerialPort_DataReceived
CommPortSetup()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub mySerialPort_DataReceived(ByVal sender As Object, ByVal e As SerialDataReceivedEventArgs)
'Handles serial port data received events
UpdateFormDelegate1 = New UpdateFormDelegate(AddressOf UpdateDisplay)
Dim n As Integer = mySerialPort.BytesToRead 'find number of bytes in buf
comBuffer = New Byte(n - 1) {} 're dimension storage buffer
mySerialPort.Read(comBuffer, 0, n) 'read data from the buffer
Me.Invoke(UpdateFormDelegate1) 'call the delegate
End Sub
Private Sub UpdateDisplay()
Label2.Text = CStr(comBuffer(0))
End Sub
Private Sub CommPortSetup()
With mySerialPort
.PortName = "COM3"
.BaudRate = 9600
.DataBits = 8
.Parity = Parity.None
.StopBits = StopBits.One
.Handshake = Handshake.None
End With
Try
mySerialPort.Open()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
mySerialPort.WriteLine("AT+VCID")
End Sub
End Class