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/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2014 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 <signal.h>
#include "mq303a.hpp"
using namespace std;
int shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main ()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate an mq303a sensor on analog pin A0
// This device uses a heater powered from an analog I/O pin.
// If using A0 as the data pin, then you need to use A1, as the heater
// pin (if using a grove mq303a). For A1, we can use the D15 gpio,
// setup as an output, and drive it low to power the heater.
upm::MQ303A *mq303a = new upm::MQ303A(0, 15);
cout << "Enabling heater and waiting 2 minutes for warmup." << endl;
mq303a->heaterEnable(true);
sleep(120);
cout << "This sensor may need to warm until the value drops below about 450."
<< endl;
// Print the detected alcohol value every second
while (shouldRun)
{
int val = mq303a->value();
cout << "Alcohol detected (higher means stronger alcohol): "
<< val << endl;
sleep(1);
}
//! [Interesting]
cout << "Exiting" << endl;
mq303a->heaterEnable(false);
delete mq303a;
return 0;
}
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