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Re: [ECS] Multiples->COM ? Ingo Pakleppa Fri, 23 Apr 1999 07:32:17 -0700

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No. RS-232 is not organized as a BUS, but rather has a separate transmit
and receive line. If you have three lines tied into the same port, which
transmit would you connect with which receive?

That said, I actually did wire such a thing once - the only reason it
worked in that case was that there was only one port that ever sent, and
two ports that NEVER sent a beep, not even an ACK or anything like that. So
it was, in that case, an easy matter to decide which TX line to connect
with which two RX lines.

And - sure enough - we ended up having another problem: the single sending
port was barely powerful enough to drive the two receiving ports.

Ingo

At 10:25 AM 4/23/99 -0700, Mark Gilmore wrote:
>Does anyone know if you can feed multiple
>RS-232 lines into a single COM port (tied
>together) ? Tanx
>-- 
>Mark Gilmore
>Omnipotence (ECS Home Automation Software)
>omnip@usit.net
>http://www.usit.com/omnip
>

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