<%@ Page Language="C#" %>
System.IO.Ports.SerialPort SerialPort1 = new System.IO.Ports.SerialPort();
protected void Page_Load(object sender, EventArgs e)
{
this.SerialPort1.PortName = "COM1";
if (!this.SerialPort1.IsOpen)
{
this.SerialPort1.Open();
}
this.SerialPort1.Write("Hello World");
this.SerialPort1.Close();
}
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