1 /*
2 * Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
3 * Copyright (c) 2014 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
26 #include <unistd.h>
27 #include <iostream>
28 #include "tp401.h"
29
30 using namespace std;
31
32 //! [Interesting]
33 // Give a qualitative meaning to the value from the sensor
34 std::string
airQuality(uint16_t value)35 airQuality(uint16_t value)
36 {
37 if(value < 50) return "Fresh Air";
38 if(value < 200) return "Normal Indoor Air";
39 if(value < 400) return "Low Pollution";
40 if(value < 600) return "High Pollution - Action Recommended";
41 return "Very High Pollution - Take Action Immediately";
42 }
43
main()44 int main ()
45 {
46 upm::TP401* airSensor = new upm::TP401(0); // Instantiate new grove air quality sensor on analog pin A0
47
48 cout << airSensor->name() << endl;
49
50 fprintf(stdout, "Heating sensor for 3 minutes...\n");
51 // wait 3 minutes for sensor to warm up
52 for(int i = 0; i < 3; i++) {
53 if(i) {
54 fprintf(stdout, "Please wait, %d minute(s) passed..\n", i);
55 }
56 sleep(60);
57 }
58 fprintf(stdout, "Sensor ready!\n");
59
60 while(true) {
61 uint16_t value = airSensor->getSample(); // Read raw value
62 float ppm = airSensor->getPPM(); // Read CO ppm (can vary slightly from previous read)
63 fprintf(stdout, "raw: %4d ppm: %5.2f %s\n", value, ppm, airQuality(value).c_str());
64 usleep(2500000); // Sleep for 2.5s
65 }
66
67 delete airSensor;
68 return 0;
69 }
70 //! [Interesting]
71