User`s guide

PuTTY is a free Windows terminal program that can send and receive bytes on a

serial port.

If you need to send and receive non-ASCII bytes, you can use the Pololu Serial Transmitter Utility for

Windows [http://www.pololu.com/docs/0J23].

Advanced users developing scripted applications may prefer the free terminal program

kermit [http://www.columbia.edu/kermit/] (Windows or Linux).

You can also write a computer program to use the serial port. The freely available Microsoft .NET framework for

Windows contains a SerialPort class that makes it easy to read and write bytes from a serial port. Here is some

example C# .NET code that uses the TTL Serial Port:

// Choose the port name and baud rate.

// Port name must be determined from the Device Manager.

System.IO.Ports.SerialPort port = new System.IO.Ports.SerialPort("COM4", 115200);

// Connect to the port.

port.Open();

// Transmit two bytes: 0x61, 0x62

port.Write(new byte[]{0x61, 0x62}, 0, 2);

// Wait for a byte to be received on the RX line.

int response = port.ReadByte();

// Show the user what byte was received.

MessageBox.Show("Received byte: " + response);

// Disconnect from the port so that other programs can use it.

port.Close();

9. Using the TTL Serial Port Page 35 of 41