Lucian Corduneanu / grove-air-quality-sensor

Grove Air Quality Sensor.

Fork of Grove_Air_Quality_Sensor_Library by Seeed

Air_Quality.cpp@3:c25365a52d78, 2016-12-23 (annotated)

Committer:
lucian@192-168-0-106.rdsnet.ro
Date:
Fri Dec 23 22:31:17 2016 +0200
Revision:
3:c25365a52d78
Parent:
2:95009177a860
Child:
4:0ca4a9fd1b5d
IEM-192 Refactor forked lib and our air quality sensor code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 0:885417624ec2 1 /*
mbedAustin 0:885417624ec2 2 AirQuality library v1.0
mbedAustin 0:885417624ec2 3 2010 Copyright (c) Seeed Technology Inc. All right reserved.
mbedAustin 0:885417624ec2 4
mbedAustin 0:885417624ec2 5 Original Author: Bruce.Qin
mbedAustin 0:885417624ec2 6
mbedAustin 0:885417624ec2 7 This library is free software; you can redistribute it and/or
mbedAustin 0:885417624ec2 8 modify it under the terms of the GNU Lesser General Public
mbedAustin 0:885417624ec2 9 License as published by the Free Software Foundation; either
mbedAustin 0:885417624ec2 10 version 2.1 of the License, or (at your option) any later version.
mbedAustin 0:885417624ec2 11
mbedAustin 0:885417624ec2 12 This library is distributed in the hope that it will be useful,
mbedAustin 0:885417624ec2 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
mbedAustin 0:885417624ec2 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
mbedAustin 0:885417624ec2 15 Lesser General Public License for more details.
mbedAustin 0:885417624ec2 16
mbedAustin 0:885417624ec2 17 You should have received a copy of the GNU Lesser General Public
mbedAustin 0:885417624ec2 18 License along with this library; if not, write to the Free Software
mbedAustin 0:885417624ec2 19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
mbedAustin 0:885417624ec2 20 */
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 21 #include "Air_Quality.h"
mbedAustin 0:885417624ec2 22
mbedAustin 0:885417624ec2 23 //Get the avg voltage in 5 minutes.
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 24 void AirQuality::avgVoltage() {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 25 if (i == 150) { //sum 5 minutes
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 26 standard_vol = temp / 150;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 27 temp = 0;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 28 debug_if(DEBUG_AIR_QUALITY, "Vol_standard in 5 minutes: %d", standard_vol);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 29 i = 0;
mbedAustin 0:885417624ec2 30 } else {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 31 temp += first_vol;
mbedAustin 0:885417624ec2 32 i++;
mbedAustin 0:885417624ec2 33 }
mbedAustin 0:885417624ec2 34 }
mbedAustin 0:885417624ec2 35
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 36 void AirQuality::init(PinName pin) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 37 _pin = pin;
mbedAustin 0:885417624ec2 38 AnalogIn sensor(_pin);
mbedAustin 0:885417624ec2 39 unsigned char i = 0;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 40 debug_if(DEBUG_AIR_QUALITY, "Air Quality Sensor Starting Up...(20s)");
mbedAustin 0:885417624ec2 41 wait(20); //20s
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 42 init_voltage = (uint16_t) (sensor.read() * 1000); // boost the value to be on a 0 -> 1000 scale for compatibility
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 43 debug_if(DEBUG_AIR_QUALITY, "The initial voltage is %d%% of source ", init_voltage / 10);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 44 while (init_voltage) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 45 if ((init_voltage < 798) && (init_voltage > 10)) {
mbedAustin 0:885417624ec2 46 // the init voltage is ok
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 47 first_vol = (uint16_t) (sensor.read() * 1000); //initialize first value
mbedAustin 0:885417624ec2 48 last_vol = first_vol;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 49 standard_vol = last_vol;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 50 debug_if(DEBUG_AIR_QUALITY, "Sensor ready.");
mbedAustin 0:885417624ec2 51 error = false;;
mbedAustin 0:885417624ec2 52 break;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 53 } else if (init_voltage > 798 || init_voltage <= 10) {
mbedAustin 0:885417624ec2 54 // The sensor is not ready, wait a bit for it to cool off
mbedAustin 0:885417624ec2 55 i++;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 56 debug_if(DEBUG_AIR_QUALITY, "Sensor not ready (%d), try %d/5, waiting 60 seconds...", init_voltage, i);
mbedAustin 0:885417624ec2 57 wait(60);//60s
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 58 init_voltage = (uint16_t) (sensor.read() * 1000);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 59 if (i == 5) {
mbedAustin 0:885417624ec2 60 // After 5 minutes warn user that the sensor may be broken
mbedAustin 0:885417624ec2 61 i = 0;
mbedAustin 0:885417624ec2 62 error = true;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 63 debug_if(DEBUG_AIR_QUALITY, "Sensor Error! You may have a bad sensor. :-(");
mbedAustin 0:885417624ec2 64 }
mbedAustin 0:885417624ec2 65 } else
mbedAustin 0:885417624ec2 66 break;
mbedAustin 0:885417624ec2 67 }
mbedAustin 0:885417624ec2 68 }
mbedAustin 0:885417624ec2 69
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 70 air_quality_values AirQuality::slope(void) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 71 while (timer_index) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 72 if (first_vol - last_vol > 400 || first_vol > 700) {
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 73 debug_if(DEBUG_AIR_QUALITY, "Very high pollution! Force signal active.");
mbedAustin 0:885417624ec2 74 timer_index = 0;
mbedAustin 0:885417624ec2 75 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 76 return VERY_HIGH_POLLUTION;
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 77 } else if ((first_vol - last_vol > 400 && first_vol < 700) || first_vol - standard_vol > 150) {
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 78 debug_if(DEBUG_AIR_QUALITY, "sensor_value:%d", first_vol);
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 79 debug_if(DEBUG_AIR_QUALITY, "High pollution!");
mbedAustin 0:885417624ec2 80 timer_index = 0;
mbedAustin 0:885417624ec2 81 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 82 return HIGH_POLLUTION;
mbedAustin 0:885417624ec2 83
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 84 } else if ((first_vol - last_vol > 200 && first_vol < 700) || first_vol - standard_vol > 50) {
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 85 // debug_if( DEBUG_AIR_QUALITY, first_vol - last_vol);
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 86 debug_if(DEBUG_AIR_QUALITY, "sensor_value:%d", first_vol);
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 87 debug_if(DEBUG_AIR_QUALITY, "Low pollution!");
mbedAustin 0:885417624ec2 88 timer_index = 0;
mbedAustin 0:885417624ec2 89 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 90 return LOW_POLLUTION;
mbedAustin 0:885417624ec2 91 } else {
mbedAustin 0:885417624ec2 92 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 93 debug_if(DEBUG_AIR_QUALITY, "sensor_value:%d", first_vol);
lucian@192-168-0-106.rdsnet.ro 3:c25365a52d78 94 debug_if(DEBUG_AIR_QUALITY, "No pollution");
mbedAustin 0:885417624ec2 95 timer_index = 0;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 96 return NO_POLLUTION;
mbedAustin 0:885417624ec2 97 }
mbedAustin 0:885417624ec2 98 }
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 99 return UNKNOWN;
mbedAustin 0:885417624ec2 100 }