How to: Send Strings to Serial Ports in Visual Basic
This topic describes how to use
My.Computer.Ports to send strings to the computer's serial ports in Visual Basic.
This example sends a string to the COM1 serial port. You may need to use a different serial port on your computer.
My.Computer.Ports.OpenSerialPort method to obtain a reference to the port. For more information, see OpenSerialPort.
Using block allows the application to close the serial port even if it generates an exception. All code that manipulates the serial port should appear within this block or within a
The WriteLine method sends the data to the serial port.
Sub SendSerialData(ByVal data As String) ' Send strings to a serial port. Using com1 As IO.Ports.SerialPort = My.Computer.Ports.OpenSerialPort("COM1") com1.WriteLine(data) End Using End Sub
Compiling the Code
- This example assumes the computer is using
This example assumes the computer is using
COM1; for more flexibility, the code should allow the user to select the desired serial port from a list of available ports. For more information, see How to: Show Available Serial Ports.
This example uses a
Using block to make sure that the application closes the port even if it throws an exception. For more information, see Using Statement.