> 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. Wouter van Ooijen --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .