>>>Is there any chance this wireless device supports hardware handshaking? If so, a test of a status line would indicate its readiness to send or receive. RTS/CTS would be ideal...
>>>
>>>>the port is closed because of a network failure. Lost packets for example.
>>>>I have a wireless device that has a serial comm port.
>>I think yes, for flow control it does have hardware (RTS/CTS). How can I use it?
>>
>>Thanks
>
>If the device plays nice, on a failure it should lower the CTS line. You can detect this via the OnComm Event = 3 (CTS Changed) and testing the state of the CTSHolding property of your Comm control. Or you could just test it's state when you suspect a problem.
But onComm event won't be fired because com port does not send any data to the control.