1 /* 2 * Author: Stefan Andritoiu <stefan.andritoiu@intel.com> 3 * Copyright (c) 2015 Intel Corporation. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 //NOT TESTED!!! 26 public class MQ2Sample { 27 private static final short resolution = 5; 28 29 static { 30 try { 31 System.loadLibrary("javaupm_gas"); 32 } catch (UnsatisfiedLinkError e) { 33 System.err.println("error in loading native library"); 34 System.exit(-1); 35 } 36 } 37 main(String[] args)38 public static void main(String[] args) throws InterruptedException { 39 // ! [Interesting] 40 short[] buffer = new short[128]; 41 42 // Attach gas sensor to A0 43 upm_gas.MQ2 sensor = new upm_gas.MQ2(0); 44 45 upm_gas.thresholdContext ctx = new upm_gas.thresholdContext(); 46 ctx.setAverageReading(0); 47 ctx.setRunningAverage(0); 48 ctx.setAveragedOver(2); 49 50 while (true) { 51 int len = sensor.getSampledWindow(2, buffer); 52 53 if (len != 0) { 54 int thresh = sensor.findThreshold(ctx, 30, buffer); 55 sensor.printGraph(ctx, resolution); 56 if (thresh != 0) { 57 System.out.println("---Threshold reached---"); 58 } 59 } 60 61 Thread.sleep(1000); 62 } 63 // ! [Interesting] 64 } 65 }