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45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
/*
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* Author: Zion Orent <zorent@ics.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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var upmMQ2 = require("jsupm_gas");
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// Attach gas sensor to AIO0
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var myMQ2 = new upmMQ2.MQ2(0);
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var threshContext = new upmMQ2.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 milliseconds;
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// find the average of 128 samples; and
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// print a running graph of the averages using a resolution of 5
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while(1)
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{
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var buffer = new upmMQ2.uint16Array(128);
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var len = myMQ2.getSampledWindow(2, 128, buffer);
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if (len)
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{
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var thresh = myMQ2.findThreshold(threshContext, 30, buffer, len);
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myMQ2.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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