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ed15b1042d
This module implements support for the Grove Ear-clip heart rate sensor. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Zion Orent <zorent@ics.com> Signed-off-by: Sarah Knepper <sarah.knepper@intel.com>
61 lines
2.2 KiB
JavaScript
61 lines
2.2 KiB
JavaScript
/*jslint node:true, vars:true, bitwise:true, unparam:true */
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/*jshint unused:true */
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/*global */
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/*
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* Author: Zion Orent <zorent@ics.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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// Load heart rate sensor module
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var heartRateSensor = require('jsupm_groveehr');
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// Instantiate a Grove Ear-clip Heart Rate sensor on digital pin D2
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var myHeartRateSensor = new heartRateSensor.GroveEHR(2);
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// set the beat counter to 0, init the clock and start counting beats
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myHeartRateSensor.clearBeatCounter();
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myHeartRateSensor.initClock();
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myHeartRateSensor.startBeatCounter();
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setInterval(readHeartRate, 1000);
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function readHeartRate()
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{
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// we grab these just for display purposes in this example
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var millis = myHeartRateSensor.getMillis();
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var beats = myHeartRateSensor.beatCounter();
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// heartRate() requires that at least 5 seconds pass before
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// returning anything other than 0
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var hr = myHeartRateSensor.heartRate();
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// output milliseconds passed, beat count, and computed heart rate
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console.log("Millis: " + millis + " Beats: " + beats +
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" Heart Rate: " + hr);
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}
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// Print message when exiting
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process.on('SIGINT', function()
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{
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console.log("Exiting...");
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process.exit(0);
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});
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