Home | History | Annotate | Download | only in java 
      1 /*
      2  * Author: Stefan Andritoiu <stefan.andritoiu (at) intel.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 public class TP401Sample {
     26 	static {
     27 		try {
     28 			System.loadLibrary("javaupm_gas");
     29 		} catch (UnsatisfiedLinkError e) {
     30 			System.err.println("error in loading native library");
     31 			System.exit(-1);
     32 		}
     33 	}
     34 
     35 	private static String airQuality(int value) {
     36 		if (value < 50)
     37 			return "Fresh Air";
     38 		if (value < 200)
     39 			return "Normal Indoor Air";
     40 		if (value < 400)
     41 			return "Low Pollution";
     42 		if (value < 600)
     43 			return "High Pollution - Action Recommended";
     44 		return "Very High Pollution - Take Action Immediately";
     45 	}
     46 
     47 	public static void main(String[] args) throws InterruptedException {
     48 		// ! [Interesting]
     49 		// Instantiate new grove air quality sensor on analog pin A0
     50 		upm_gas.TP401 airSensor = new upm_gas.TP401(0);
     51 
     52 		System.out.println(airSensor.name());
     53 
     54 		System.out.println("Heating sensor for 3 minutes...");
     55 		// wait 3 minutes for sensor to warm up
     56 		for (int i = 0; i < 3; i++) {
     57 			if (i != 0)
     58 				System.out.println("Please wait, " + i + " minute(s) passed..");
     59 			Thread.sleep(60000);
     60 		}
     61 		System.out.println("Sensor ready!");
     62 
     63 		while (true) {
     64 			int value = airSensor.getSample(); // Read raw value
     65 			float ppm = airSensor.getPPM(); // Read CO ppm (can vary slightly
     66 											// from previous read)
     67 
     68 			System.out.println("raw: " + value + " ppm: " + ppm + "  " + airQuality(value));
     69 
     70 			Thread.sleep(100);
     71 		}
     72 		// ! [Interesting]
     73 	}
     74 
     75 }