What ASP.NET permissions do I need to access a serial port?

Question

I am working on a asp.net application and I want it to communicate to a arduino board via a serial port. I created a windows application that could do that and it worked, b

Answer 1

Try open connection and close connection on serial port block command. Ex

 SerialPort COM = new System.IO.Ports.SerialPort("COM14");
protected void btnRele1_Click(object sender, EventArgs e)
{
    COM.Open();
    if (btnRele1.BackColor != Color.Green)
    {
        COM.WriteLine("1");
        btnRele1.BackColor = Color.Green;
        btnRele1.ForeColor = Color.White;
        btnRele1.Text = "Rele 1 - ON";
    }
    else
    {
        COM.WriteLine("2");
        btnRele1.BackColor = Color.LightGray;
        btnRele1.ForeColor = Color.Black;
        btnRele1.Text = "Rele 1 - OFF";
    }
    txtSerial.Text = COM.ReadLine();
    COM.Close();
}