I have been having trouble with the screen program for mac. Here is a perl script for reading from the serial port. you run it like this:

./f705c6e12.pl "*port*" "*times to repeat*"

"port" is the port that is in the makefile. "times to repeat" is the number of lines you want the program to read. If you want it to read an infinite number of lines, use 0. Here are examples.

./ReadSerial.pl /dev/ttyUSB0 0

./ReadSerial.pl COM5 0

./ReadSerial.pl /dev/cu.PL2303-0000201A 0

I will post a read/write program when I figure out how to do it.

ok, I have the writer. It works at the same time as the reader. no args; just ./WriteSerial.pl

whoops--i forgot to add the code. here it is.