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