1#!/usr/bin/python 2# Author: Zion Orent <zorent@ics.com> 3# Copyright (c) 2015 Intel Corporation. 4# 5# Permission is hereby granted, free of charge, to any person obtaining 6# a copy of this software and associated documentation files (the 7# "Software"), to deal in the Software without restriction, including 8# without limitation the rights to use, copy, modify, merge, publish, 9# distribute, sublicense, and/or sell copies of the Software, and to 10# permit persons to whom the Software is furnished to do so, subject to 11# the following conditions: 12# 13# The above copyright notice and this permission notice shall be 14# included in all copies or substantial portions of the Software. 15# 16# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 24import time, sys, signal, atexit 25import pyupm_ppd42ns as upmPpd42ns 26 27# Instantiate a dust sensor on digital pin D8 28myDustSensor = upmPpd42ns.PPD42NS(8) 29 30 31## Exit handlers ## 32# This function stops python from printing a stacktrace when you hit control-C 33def SIGINTHandler(signum, frame): 34 raise SystemExit 35 36# This function lets you run code on exit, including functions from myDustSensor 37def exitHandler(): 38 print "Exiting" 39 sys.exit(0) 40 41# Register exit handlers 42atexit.register(exitHandler) 43signal.signal(signal.SIGINT, SIGINTHandler) 44 45 46notice = ("This program will give readings " 47"every 30 seconds until you stop it") 48print notice 49 50while(1): 51 data = myDustSensor.getData() 52 # we need to sleep for a bit for the data to print out 53 time.sleep(.1) 54 print "Low pulse occupancy: " + str(data.lowPulseOccupancy) 55 print "Ratio: " + str(data.ratio) 56 print "Concentration: " + str(data.concentration) 57