diff --git a/examples/javascript/gas/mq3.js b/examples/javascript/gas/mq3.js new file mode 100644 index 00000000..607d422a --- /dev/null +++ b/examples/javascript/gas/mq3.js @@ -0,0 +1,60 @@ +/*jslint node:true, vars:true, bitwise:true, unparam:true */ +/*jshint unused:true */ +/*global */ +/* +* Author: Zion Orent +* Copyright (c) 2015 Intel Corporation. +* +* Permission is hereby granted, free of charge, to any person obtaining +* a copy of this software and associated documentation files (the +* "Software"), to deal in the Software without restriction, including +* without limitation the rights to use, copy, modify, merge, publish, +* distribute, sublicense, and/or sell copies of the Software, and to +* permit persons to whom the Software is furnished to do so, subject to +* the following conditions: +* +* The above copyright notice and this permission notice shall be +* included in all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +var upmMQ3 = require("jsupm_gas"); + +// Attach gas sensor to AIO0 +var myMQ3 = new upmMQ3.MQ3(0); + +var threshContext = new upmMQ3.thresholdContext; +threshContext.averageReading = 0; +threshContext.runningAverage = 0; +threshContext.averagedOver = 2; + +// Infinite loop, ends when script is cancelled +// Repeatedly, take a sample every 2 milliseconds; +// find the average of 128 samples; and +// print a running graph of the averages using a resolution of 5 +while(1) +{ + var buffer = new upmMQ3.uint16Array(128); + var len = myMQ3.getSampledWindow(2, 128, buffer); + if (len) + { + var thresh = myMQ3.findThreshold(threshContext, 30, buffer, len); + myMQ3.printGraph(threshContext, 5); + //if (thresh) + // console.log("Threshold is " + thresh); + } +} + +// Print message when exiting +process.on('SIGINT', function() +{ + console.log("Exiting..."); + process.exit(0); +});