1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3/*global */
4/*
5* Author: Zion Orent <zorent@ics.com>
6* Copyright (c) 2014 Intel Corporation.
7*
8* Permission is hereby granted, free of charge, to any person obtaining
9* a copy of this software and associated documentation files (the
10* "Software"), to deal in the Software without restriction, including
11* without limitation the rights to use, copy, modify, merge, publish,
12* distribute, sublicense, and/or sell copies of the Software, and to
13* permit persons to whom the Software is furnished to do so, subject to
14* the following conditions:
15*
16* The above copyright notice and this permission notice shall be
17* included in all copies or substantial portions of the Software.
18*
19* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26*/
27
28var UVSensor = require('jsupm_guvas12d');
29
30// Instantiate a UV sensor on analog pin A0
31var myUVSensor = new UVSensor.GUVAS12D(0);
32
33// analog voltage, usually 3.3 or 5.0
34var g_GUVAS12D_AREF = 5.0;
35var g_SAMPLES_PER_QUERY = 1024;
36
37setInterval(function()
38{
39	var outputStr = "AREF: " + g_GUVAS12D_AREF
40					+ ", Voltage value (higher means more UV): "
41					+ roundNum(myUVSensor.value(g_GUVAS12D_AREF, g_SAMPLES_PER_QUERY), 6);
42	console.log(outputStr);
43}, 1000);
44
45function roundNum(num, decimalPlaces)
46{
47	var extraNum = (1 / (Math.pow(10, decimalPlaces) * 1000));
48	return (Math.round((num + extraNum) * (Math.pow(10, decimalPlaces))) / Math.pow(10, decimalPlaces));
49}
50
51// Print message when exiting
52process.on('SIGINT', function()
53{
54	console.log("Exiting...");
55	process.exit(0);
56});
57