#! /usr/bin/env python
# Read the output of an Arduino which is constantly printing sensor output.
# See also
# http://www.arcfn.com/2009/06/arduino-sheevaplug-cool-hardware.html
import sys, serial, threading
class Arduino(threading.Thread) :
def run(self, interactive) :
# Port may vary, so look for it:
baseport = "/dev/ttyUSB"
self.ser = None
for i in xrange(0, 9) :
try :
self.ser = serial.Serial(baseport + str(i), 9600, timeout=10)
break
except :
self.ser = None
pass
if not self.ser :
print "Couldn't open a serial port"
sys.exit(1)
print "Opened /dev/ttyUSB" + str(i)
self.ser.flushInput()
while True :
data = self.ser.readline().strip()
if data :
if interactive :
print data
else :
webfile = open("arduino.html", "w")
print >>webfile, """
Arduino sensor output
Arduino sensor output
%s
""" % data
webfile.close()
# If -i, run in interactive mode
if len (sys.argv) > 1 and sys.argv[1] == '-i' :
interactive = True
else :
interactive = False
arduino = Arduino()
arduino.run(interactive)