#####!/bin/bash
if [ -e "$1" ]; then
 serial=/dev/ttyS0
 stty -F $serial 9600 cs8
 filename="$1"
 while read line
 do
  echo $line > $serial
  sleep 0.05
 done < "$filename"
 sleep 0.1
 echo "" > $serial
 sleep 1
 echo -n "x" > $serial
fi