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 var upmTP401 = require('jsupm_gas'); 26 //var time = require('sleep'); 27 28 //give a qualitative meaning to the value from the sensor 29 function airQuality(value) 30 { 31 if(value < 50) return "Fresh Air"; 32 if(value < 200) return "Normal Indoor Air"; 33 if(value < 400) return "Low Pollution"; 34 if(value < 600) return "High Pollution - Action Recommended"; 35 return "Very High Pollution - Take Action Immediately"; 36 } 37 38 function loop() 39 { 40 //read values (consecutive reads might vary slightly) 41 var value = airSensor.getSample(); 42 var ppm = airSensor.getPPM(); 43 44 //write the sensor values to the console 45 console.log("raw: " + value + " ppm: " + (" " + ppm.toFixed(2)).substring(-5, 5) + " " + airQuality(value)); 46 47 //wait 2.5 s then call function again 48 setTimeout(loop, 2500); 49 } 50 51 //setup sensor on Analog pin #0 (A0) 52 var airSensor = new upmTP401.TP401(0); 53 54 //warm up sensor 55 console.log("Sensor is warming up for 3 minutes.."); 56 var i = 1; 57 58 //print a message every passing minute 59 var waiting = setInterval(function() { 60 console.log(i++ + " minute(s) passed."); 61 if(i == 3) clearInterval(waiting); 62 }, 60000); 63 64 //start loop in 3 minutes 65 setTimeout(function(){ 66 console.log("Sensor is ready!"); 67 loop(); 68 }, 180000); 69
