Maybe you found a bad one. I made a loopback tester that just connects pins 2 & 3. I plug it in, and press a key. If I see an echo, I have the right COM port selected, and it is working.
One thing: I never use any form of hardware handshaking.
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Maybe you found a bad one. I made a loopback tester that just connects pins 2 & 3. I plug it in, and press a key. If I see an echo, I have the right COM port selected, and it is working.
One thing: I never use any form of hardware handshaking.
Charles Linquist
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