text: #!/usr/bin/env python
  #
  # GrovePi Example for using the Grove Dust sensor(http://www.seeedstudio.com/depot/Grove-Dust-Sensor-p-1050.html) with the GrovePi
  #
  # The GrovePi connects the Raspberry Pi and Grove sensors.  You can learn more about GrovePi here:  http://www.dexterindustries.com/GrovePi
  #
  # Have a question about this example?  Ask on the forums here:  http://www.dexterindustries.com/forum/?forum=grovepi
  #
  '''
  ## License
  
  The MIT License (MIT)
  
  GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
  Copyright (C) 2015  Dexter Industries
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  '''
  
  # USAGE
  #
  # Connect the dust sensor to Port 8 on the GrovePi. The dust sensor only works on that port
  # The dust sensor takes 30 seconds to update the new values
  #
  # the fist byte is 1 for a new value and 0 for old values
  # second byte is the concentration in pcs/0.01cf
  
  import time
  import grovepi
  import atexit
  
  atexit.register(grovepi.dust_sensor_dis)
  
  print("Reading from the dust sensor")
  grovepi.dust_sensor_en()
  while True:
      try:
  		[new_val,lowpulseoccupancy] = grovepi.dustSensorRead()
  		if new_val:
  			print(lowpulseoccupancy)
  		time.sleep(5) 
  
      except IOError:
          print ("Error")
  