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1563c71c5f
Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
61 lines
2.1 KiB
JavaScript
61 lines
2.1 KiB
JavaScript
/*jslint node:true, vars:true, bitwise:true, unparam:true */
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/*jshint unused:true */
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/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2015 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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var upmGAS = require("jsupm_gas");
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// Attach gas sensor to Analog A0
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var sensor = new upmGAS.MQ4(0);
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var threshContext = new upmGAS.thresholdContext;
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threshContext.averageReading = 0;
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threshContext.runningAverage = 0;
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threshContext.averagedOver = 2;
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// Infinite loop, ends when script is cancelled
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// Repeatedly, take a sample every 2 microseconds;
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// find the average of 128 samples; and
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// print a running graph of asteriskss as averages
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while(1)
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{
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var buffer = new upmGAS.uint16Array(128);
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var len = sensor.getSampledWindow(2, 128, buffer);
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if (len)
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{
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var thresh = sensor.findThreshold(threshContext, 30, buffer, len);
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sensor.printGraph(threshContext, 5);
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//if (thresh)
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// console.log("Threshold is " + thresh);
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}
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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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