从C＃中的USB端口读取字节

Question

I would like to ask why does my program ReadByte() function returns a different value. My USB port will be sending a byte value of 8, however, when the c# program reads it, it receives a value of 56. Why is that happening? The c# code is as below:

private void serial_Click(object sender, EventArgs e)
{
            SerialPort port = new SerialPort("COM4", 9600);
            port.Open();

            int num1 = 0;
            num1 = port.ReadByte();
            String a = Convert.ToString(num1);
            MessageBox.Show(a);
            port.Close();
}

Your help is much appreciated.

Answer 1

You may be sending ascii instead of binary data. 56 is ascii for "8".