upm  1.6.0
Sensor/Actuator repository for libmraa (v1.9.0)
mg811.hpp
1 /*
2  * Author: Jon Trulson <jtrulson@ics.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 #pragma once
25 
26 #include <iostream>
27 #include <string>
28 #include <mraa/aio.hpp>
29 #include <mraa/gpio.hpp>
30 
31 namespace upm {
71  class MG811 {
72  public:
73 
81  MG811(int pin, int dpin, float aref=5.0);
82 
86  ~MG811();
87 
92  float getReferenceVoltage();
93 
103  void setCalibration(float ppm400, float ppm1000);
104 
110  float volts();
111 
120  float ppm();
121 
129  bool thresholdReached();
130 
131  protected:
132  mraa::Aio m_aio;
133  mraa::Gpio m_gpio;
134 
135  // calibration values
136  float m_zeroPointValue;
137  float m_reactionValue;
138 
139  // ADC resolution
140  int m_aRes;
141 
142  private:
143  float m_aref;
144  };
145 }
146 
147 
float getReferenceVoltage()
Definition: mg811.cxx:72
float volts()
Definition: mg811.cxx:59
API for the DFRobot CO2 Sensor.
Definition: mg811.hpp:71
bool thresholdReached()
Definition: mg811.cxx:91
C++ API for the kxtj3 driver.
Definition: a110x.hpp:29
MG811(int pin, int dpin, float aref=5.0)
Definition: mg811.cxx:39
void setCalibration(float ppm400, float ppm1000)
Definition: mg811.cxx:66
float ppm()
Definition: mg811.cxx:77
~MG811()
Definition: mg811.cxx:55