public void Close()
{
if (IsOpen)
{
try { Stop(); } catch (Exception) { /*ignored*/ }
serial.Close();
serial.Dispose();
serial = null;
}
}
private static SerialConnection TryOpenAndCheckDevice(
string portName, int baudRate, Func <SerialConnection, bool> isDeviceAvailable)
{
SerialConnection conn = null;
try {
conn = new SerialConnection(portName, baudRate);
conn.Open();
if (isDeviceAvailable(conn))
{
return(conn);
}
} catch (UnauthorizedAccessException) {
// port is not available
} catch (TimeoutException) {
// baud rate or protocol error
} catch (IOException) {
// unexpected failure
}
if (conn != null)
{
conn.Close();
conn.Dispose();
}
return(null);
}
