// This subroutine sends an AT command to the modem, and records its response.
// It depends on the timer to do the reading of the response.
private void btnSendATCommand_Click(object sender, System.EventArgs e)
//btnSendATCommand.Click;
{
// Always wrap up working with Comm Ports in exception handlers.
try
{
// Enable the timer.
this.tmrReadCommPort.Enabled = true;
// Attempt to open the port.
m_CommPort.Open(m_ModemPort, 115200, 8, Rs232.DataParity.Parity_None,
Rs232.DataStopBit.StopBit_1, 4096);
// Write an AT Command to the Port.
m_CommPort.Write(Encoding.ASCII.GetBytes("AT" + "\r"));
// Sleep long enough for the modem to respond and the timer to fire.
System.Threading.Thread.Sleep(200);
Application.DoEvents();
m_CommPort.Close();
}
catch (Exception ex)
{
// Warn the user.
MessageBox.Show("Unable to communicate with Modem");
}
finally
{
// Disable the timer.
this.tmrReadCommPort.Enabled = false;
}
}
/// <summary></summary>
public void CloseConnection()
{
textProgress.Text += "Modem Connection Closed\r\n";
ScrollProgress();
moRS232.Close();
}
public void CloseConnection()
{
moRS232.Close();
}