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Some PCs are picky about the "other" signals on the 232 line. DTR, RTS, etc. This is often seen with a DIY cable with only the GND, RxD, & TxD lines. Google around for which signals need to be connected. Oh, and do you have a "non-virtual" (i.e., real) null modem in use? You'll need it for real hardware. Finally, go to Radio Shack (or its equivalent) and get an RS232 analyzer. I got mine for about $25. You may need 9-to-25 pin adapters.
HTH,
--Rich
HTH,
--Rich
leftyretro
- Joined Nov 25, 2008
- 395
"i've tested it a few times, 1st time it works, the rest of the time it doesn't works."
If that statement is a fact then a null modem cable will not solve your problem. If null modem wiring is required and you don't have null modem wiring presently then it can never have worked, not even once. If it worked once and you change from normal to null modem wiring then it will never work again.
If it worked once then you need to make sure your use of the flow control signals, software settings, etc, on both ends of the channel are correct.
Lefty
If that statement is a fact then a null modem cable will not solve your problem. If null modem wiring is required and you don't have null modem wiring presently then it can never have worked, not even once. If it worked once and you change from normal to null modem wiring then it will never work again.
If it worked once then you need to make sure your use of the flow control signals, software settings, etc, on both ends of the channel are correct.
Lefty
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