1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3
4/*
5 * Author: Jon Trulson <jtrulson@ics.com>
6 * Copyright (c) 2015 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
28
29var sensorObj = require('jsupm_mg811');
30
31// Instantiate an MG811 on analog pin A0, and digital pin D2 with an
32// analog reference voltage of MG811_AREF (5.0)
33
34var sensor = new sensorObj.MG811(0, 2, 5.0);
35
36// Every tenth of a second, sample the sensor and output it's
37// detected CO2 concentration in parts per million (ppm)
38
39setInterval(function()
40{
41    console.log("CO2 concentration in PPM: " + sensor.ppm());
42}, 100);
43
44// exit on ^C
45process.on('SIGINT', function()
46{
47    sensor = null;
48    sensorObj.cleanUp();
49    sensorObj = null;
50    console.log("Exiting.");
51    process.exit(0);
52});
53
54