Programming

import urllib
import serial
import re

MAXLENGTH = 512
BANNER = " Sent. "

def getmessages():
# Get a file-like object for the Python Web site's home page.
f = urllib.urlopen("http://etharooni.polorix.net/messages.txt")
# Read from the object, storing the page's contents in 's'.
s = f.read()
f.close()
return s

def formatmessage(msg):
msg = msg.upper()
p = re.compile('[^0-9^A-Z^ ^\n]')
msg = p.sub(' ', msg)

ret = ''
lines = msg.split('\n')
for s in lines:
if (len(s) > 0):
if (len(ret) + len(s) < MAXLENGTH):
ret = ret + s
if (len(ret) + len(BANNER) < MAXLENGTH):
ret = ret + BANNER
ret = chr(len(ret) >> 8) + chr(len(ret) & 0xFF) + ret
return ret

def waitfor(port, msg):
line = ''
while line.lower() != msg.lower():
line = port.readline()
print line
print "waitfor done!"
#
#
def mainstuff():
oldmessage = ''
while True:
msg = getmessages()

ser = serial.Serial('COM4', 9600) # open first serial port
print ser.portstr # check which port was really used

if (msg != oldmessage):
oldmessage = msg
msg = formatmessage(msg)
print len(msg)-2
print msg
ser.write(msg)

waitfor(ser, 'done!\r\n')

# get one rotation out!
waitfor(ser, 'EOM\r\n')
ser.close() # close port

mainstuff()