On Tue, 25 Sep 2012 14:13:51 +0200, you wrote:

>> Check the requirements of the RS232.  You might want to consider the
>> case where one unit is running at +5% and the other at -5% (if both ends
>> are the same unit).  The baud rate accuracy requirement increases with
>> baud rate, IIRC.
>
>Common misconception! Apart from minor influences like the switching=20
>time of the hardware the accuracy requirement for asynch does NOT depend=20
>on the baudrate. Hence you can not escape the accuray requirement by=20
>running at a lower baudrate.

Oscillator jitter can be a significant issue with RC oscillators, and this =
will affect higher
baudrates more than lower ones.=20

--=20
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