Lucian Corduneanu / grove-air-quality-sensor

Grove Air Quality Sensor.

Fork of Grove_Air_Quality_Sensor_Library by Seeed

Air_Quality.cpp@2:95009177a860, 2016-12-23 (annotated)

Committer:
lucian@192-168-0-106.rdsnet.ro
Date:
Fri Dec 23 20:19:35 2016 +0200
Revision:
2:95009177a860
Parent:
1:e312d147cadd
Child:
3:c25365a52d78
IEM-192 Refactor air quality lib

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 // Interrupt Handler Assignment
mbedAustin 0:885417624ec2 24 Ticker IntHandler;
mbedAustin 0:885417624ec2 25
mbedAustin 0:885417624ec2 26 //Get the avg voltage in 5 minutes.
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 27 void AirQuality::avgVoltage() {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 28 if (i == 150) { //sum 5 minutes
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 29 vol_standard = temp / 150;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 30 temp = 0;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 31 debug("Vol_standard in 5 minutes: %d", vol_standard);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 32 i = 0;
mbedAustin 0:885417624ec2 33 } else {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 34 temp += first_vol;
mbedAustin 0:885417624ec2 35 i++;
mbedAustin 0:885417624ec2 36 }
mbedAustin 0:885417624ec2 37 }
mbedAustin 0:885417624ec2 38
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 39 void AirQuality::init(PinName pin, void(*IRQ)(void)) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 40 _pin = pin;
mbedAustin 0:885417624ec2 41 AnalogIn sensor(_pin);
mbedAustin 0:885417624ec2 42 unsigned char i = 0;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 43 debug("Air Quality Sensor Starting Up...(20s)");
mbedAustin 0:885417624ec2 44 wait(20); //20s
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 45 init_voltage = (int) (sensor.read() * 1000); // boost the value to be on a 0 -> 1000 scale for compatibility
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 46 debug("The initial voltage is %d%% of source ", init_voltage / 10);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 47 while (init_voltage) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 48 if ((init_voltage < 798) && (init_voltage > 10)) {
mbedAustin 0:885417624ec2 49 // the init voltage is ok
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 50 first_vol = (int) (sensor.read() * 1000);//initialize first value
mbedAustin 0:885417624ec2 51 last_vol = first_vol;
mbedAustin 0:885417624ec2 52 vol_standard = last_vol;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 53 debug("Sensor ready.");
mbedAustin 0:885417624ec2 54 error = false;;
mbedAustin 0:885417624ec2 55 break;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 56 } else if (init_voltage > 798 || init_voltage <= 10) {
mbedAustin 0:885417624ec2 57 // The sensor is not ready, wait a bit for it to cool off
mbedAustin 0:885417624ec2 58 i++;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 59 debug("Sensor not ready (%d), try %d/5, waiting 60 seconds...", init_voltage, i);
mbedAustin 0:885417624ec2 60 wait(60);//60s
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 61 init_voltage = (int) (sensor.read() * 1000);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 62 if (i == 5) {
mbedAustin 0:885417624ec2 63 // After 5 minutes warn user that the sensor may be broken
mbedAustin 0:885417624ec2 64 i = 0;
mbedAustin 0:885417624ec2 65 error = true;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 66 debug("Sensor Error! You may have a bad sensor. :-(");
mbedAustin 0:885417624ec2 67 }
mbedAustin 0:885417624ec2 68 } else
mbedAustin 0:885417624ec2 69 break;
mbedAustin 0:885417624ec2 70 }
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 71 // Call AirQualityInterrupt every 2 seconds
mbedAustin 0:885417624ec2 72 IntHandler.attach(IRQ, 2.0);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 73 debug("Test begin...");
mbedAustin 0:885417624ec2 74 }
mbedAustin 0:885417624ec2 75
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 76 air_quality_values AirQuality::slope(void) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 77 while (timer_index) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 78 if (first_vol - last_vol > 400 || first_vol > 700) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 79 debug("Very high pollution! Force signal active.");
mbedAustin 0:885417624ec2 80 timer_index = 0;
mbedAustin 0:885417624ec2 81 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 82 return VERY_HIGH_POLLUTION;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 83 } else if ((first_vol - last_vol > 400 && first_vol < 700) || first_vol - vol_standard > 150) {
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 84 debug("sensor_value:%d", first_vol);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 85 debug("High pollution!");
mbedAustin 0:885417624ec2 86 timer_index = 0;
mbedAustin 0:885417624ec2 87 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 88 return HIGH_POLLUTION;
mbedAustin 0:885417624ec2 89
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 90 } else if ((first_vol - last_vol > 200 && first_vol < 700) || first_vol - vol_standard > 50) {
lucianovici 1:e312d147cadd 91 //debug(first_vol-last_vol);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 92 debug("sensor_value:%d", first_vol);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 93 debug("Low pollution!");
mbedAustin 0:885417624ec2 94 timer_index = 0;
mbedAustin 0:885417624ec2 95 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 96 return LOW_POLLUTION;
mbedAustin 0:885417624ec2 97 } else {
mbedAustin 0:885417624ec2 98 avgVoltage();
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 99 debug("sensor_value:%d", first_vol);
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 100 debug("No pollution");
mbedAustin 0:885417624ec2 101 timer_index = 0;
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 102 return NO_POLLUTION;
mbedAustin 0:885417624ec2 103 }
mbedAustin 0:885417624ec2 104 }
lucian@192-168-0-106.rdsnet.ro 2:95009177a860 105 return UNKNOWN;
mbedAustin 0:885417624ec2 106 }