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_si114x as upmSi114x
26
27# Instantiate a SI114x UV Sensor on I2C bus 0
28myUVSensor = upmSi114x.SI114X(0)
29
30
31## Exit handlers ##
32# This 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,
37# including functions from myUVSensor
38def exitHandler():
39	print "Exiting"
40	sys.exit(0)
41
42# Register exit handlers
43atexit.register(exitHandler)
44signal.signal(signal.SIGINT, SIGINTHandler)
45
46
47# First initialize it
48myUVSensor.initialize()
49
50print "UV Index Scale:"
51print "---------------"
52print "11+        Extreme"
53print "8-10       Very High"
54print "6-7        High"
55print "3-5        Moderate"
56print "0-2        Low\n"
57
58# update every second and print the currently measured UV Index
59while (1):
60	# update current value(s)
61	myUVSensor.update()
62
63	# print detected value
64	print "UV Index:", myUVSensor.getUVIndex()
65
66	time.sleep(1)
67