text: /*
   * Author: Jon Trulson <jtrulson@ics.com>
   * 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.
   */
  
  #include <unistd.h>
  #include <iostream>
  #include "mq6.hpp"
  #include <signal.h>
  #include <stdlib.h>
  #include <sys/time.h>
  
  bool shouldRun = true;
  
  using namespace std;
  
  void
  sig_handler(int signo)
  {
    if (signo == SIGINT) 
      {
        shouldRun = false;
      }
  }
  
  //! [Interesting]
  int main(int argc, char **argv)
  {
    // Attach gas sensor to Analog A0
    upm::MQ6 *sensor = new upm::MQ6(0);
    signal(SIGINT, sig_handler);
    
    uint16_t buffer [128];
  
    thresholdContext ctx;
    ctx.averageReading = 0;
    ctx.runningAverage = 0;
    ctx.averagedOver   = 2;
    
    // Infinite loop, ends when script is cancelled
    // Repeatedly, take a sample every 2 microseconds;
    // find the average of 128 samples; and
    // print a running graph of asteriskss as averages
    while (shouldRun) 
      {
        int len = sensor->getSampledWindow (2, 128, buffer);
        if (len) {
          int thresh = sensor->findThreshold (&ctx, 30, buffer, len);
          sensor->printGraph(&ctx, 5);
          if (thresh) {
            // do something ....
          }
        }
      }
    
    cout << "Exiting" << endl;
    
    delete sensor;
    
    return 0;
  }
  //! [Interesting]
  