1/*jslint node:true, vars:true, bitwise:true, unparam:true */
2/*jshint unused:true */
3/*
4* Author: Zion Orent <zorent@ics.com>
5* Copyright (c) 2014 Intel Corporation.
6*
7* Permission is hereby granted, free of charge, to any person obtaining
8* a copy of this software and associated documentation files (the
9* "Software"), to deal in the Software without restriction, including
10* without limitation the rights to use, copy, modify, merge, publish,
11* distribute, sublicense, and/or sell copies of the Software, and to
12* permit persons to whom the Software is furnished to do so, subject to
13* the following conditions:
14*
15* The above copyright notice and this permission notice shall be
16* included in all copies or substantial portions of the Software.
17*
18* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25*/
26
27// Load heart rate sensor module
28var heartRateSensor = require('jsupm_groveehr');
29// Instantiate a Grove Ear-clip Heart Rate sensor on digital pin D2
30var myHeartRateSensor = new heartRateSensor.GroveEHR(2);
31
32// set the beat counter to 0, init the clock and start counting beats
33myHeartRateSensor.clearBeatCounter();
34myHeartRateSensor.initClock();
35myHeartRateSensor.startBeatCounter();
36
37var millis, beats, hr;
38var myInterval = setInterval(function()
39{
40	// we grab these just for display purposes in this example
41	millis = myHeartRateSensor.getMillis();
42	beats = myHeartRateSensor.beatCounter();
43
44	// heartRate() requires that at least 5 seconds pass before
45	// returning anything other than 0
46	hr = myHeartRateSensor.heartRate();
47
48	// output milliseconds passed, beat count, and computed heart rate
49	console.log("Millis: " + millis + " Beats: " + beats +
50	            " Heart Rate: " + hr);
51}, 1000);
52
53// Print message when exiting
54process.on('SIGINT', function()
55{
56	clearInterval(myInterval);
57	myHeartRateSensor.stopBeatCounter();
58	myHeartRateSensor = null
59	heartRateSensor.cleanUp();
60	heartRateSensor = null;
61
62	console.log("Exiting");
63	process.exit(0);
64});
65