Serial port splitter (1 output device -> 2 computers)

Question

Does anyone know how I can split a serial cable so the output from one device is connected as inputs to two different computers?

I try to connect the (-)(+)TX at the same to the two computer... I get data but wrong data with "? , % " some wrong chars

Please can someone help me with this.

Thanks!

Did you make sure to connect them with a null-modem/crossover cable? — Synetech, Commented Jul 19, 2012 at 18:35
"... connect the (-)(+)TX ..." - Differential signal?! What kind of "serial" is this, RS-422? Typical serial connections are intended to be point-to-point unless explicitly designed as multipoint. The line driver (the IC, not the SW) may not be able to cope with a split; long cables and/or small gauge conductor make it worse. Are you positive that this is a one-way connection, i.e. there is no handshaking involved? — sawdust, Commented Jul 19, 2012 at 19:27

RedGrittyBrick · Accepted Answer · 2012-07-19 20:31:39Z

2

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You can of course buy RS232 splitters rather than make your own.

answered Jul 19, 2012 at 20:31

RedGrittyBrick

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Julian Knight · Accepted Answer · 2012-07-19 20:00:38Z

1

Maybe have a hunt around electronics shops because this used to be a common requirement.

I think I've got a splitter in my "box" of old bits of kit.

It is much better to have a proper box because of the possibility of bleed over of the signals.

answered Jul 19, 2012 at 20:00

Julian Knight

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