1/*jslint node:true, vars:true, bitwise:true, unparam:true */ 2/*jshint unused:true */ 3/*global */ 4/* 5* Author: Zion Orent <zorent@ics.com> 6* Copyright (c) 2015 Intel Corporation. 7* 8* Permission is hereby granted, free of charge, to any person obtaining 9* a copy of this software and associated documentation files (the 10* "Software"), to deal in the Software without restriction, including 11* without limitation the rights to use, copy, modify, merge, publish, 12* distribute, sublicense, and/or sell copies of the Software, and to 13* permit persons to whom the Software is furnished to do so, subject to 14* the following conditions: 15* 16* The above copyright notice and this permission notice shall be 17* included in all copies or substantial portions of the Software. 18* 19* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26*/ 27 28var upmMQ3 = require("jsupm_gas"); 29 30// Attach gas sensor to AIO0 31var myMQ3 = new upmMQ3.MQ3(0); 32 33var threshContext = new upmMQ3.thresholdContext; 34threshContext.averageReading = 0; 35threshContext.runningAverage = 0; 36threshContext.averagedOver = 2; 37 38// Infinite loop, ends when script is cancelled 39// Repeatedly, take a sample every 2 milliseconds; 40// find the average of 128 samples; and 41// print a running graph of the averages using a resolution of 5 42while(1) 43{ 44 var buffer = new upmMQ3.uint16Array(128); 45 var len = myMQ3.getSampledWindow(2, 128, buffer); 46 if (len) 47 { 48 var thresh = myMQ3.findThreshold(threshContext, 30, buffer, len); 49 myMQ3.printGraph(threshContext, 5); 50 //if (thresh) 51 // console.log("Threshold is " + thresh); 52 } 53} 54 55// Print message when exiting 56process.on('SIGINT', function() 57{ 58 console.log("Exiting..."); 59 process.exit(0); 60}); 61