1 /*
2 * Author: Jon Trulson <jtrulson@ics.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 #include <unistd.h>
26 #include <iostream>
27 #include <signal.h>
28 #include "mhz16.h"
29
30 using namespace std;
31
32 bool shouldRun = true;
33
sig_handler(int signo)34 void sig_handler(int signo)
35 {
36 if (signo == SIGINT)
37 shouldRun = false;
38 }
39
main(int argc,char ** argv)40 int main (int argc, char **argv)
41 {
42 signal(SIGINT, sig_handler);
43
44 //! [Interesting]
45 // Instantiate a MHZ16 serial CO2 sensor on uart 0.
46 // This example was tested on the Grove CO2 sensor module.
47
48 upm::MHZ16* co2 = new upm::MHZ16(0);
49
50 // make sure port is initialized properly. 9600 baud is the default.
51 if (!co2->setupTty(B9600))
52 {
53 cerr << "Failed to setup tty port parameters" << endl;
54 return 1;
55 }
56
57 cout << "Make sure that the sensor has had at least 3 minutes to warm up"
58 << endl;
59 cout << "or you will not get valid results." << endl;
60 cout << "The temperature reported is not the ambient temperature, " << endl;
61 cout << "but rather the temperature of the sensor elements." << endl;
62
63 sleep(1);
64
65 int gas;
66 int temp;
67
68 while (shouldRun)
69 {
70 co2->getData(&gas, &temp);
71 cout << "CO2 concentration: " << gas << " PPM, "
72 << "Temperature (in C): " << temp <<endl;
73
74 sleep(2);
75 }
76
77 //! [Interesting]
78
79 cout << "Exiting..." << endl;
80
81 delete co2;
82 return 0;
83 }
84