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      1 /*
      2  * Author: Mihai Tudor Panu <mihai.tudor.panu (at) 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
     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 
     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