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mg811: Initial implementation

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This driver was developed on a DFRobot CO2 sensor based on the MG811:
http://www.dfrobot.com/index.php?route=product/product&product_id=1023

It seems to *require* very precise calibration at 400ppm and 1000ppm
to be accurate.  It also gets pretty hot (due to the heater) and
consumes significant current.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: sisinty sasmita patra <sisinty.s.patra@intel.com>
This commit is contained in:
Jon Trulson
2015-08-25 15:52:10 -06:00
committed by sisinty sasmita patra
parent ad1cc81c0d
commit 60cfe88e37
10 changed files with 445 additions and 0 deletions
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3
examples/c++/CMakeLists.txt
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@ -134,6 +134,7 @@ add_executable (ak8975-example ak8975.cxx)
add_executable (lsm9ds0-example lsm9ds0.cxx)
add_executable (eboled-example eboled.cxx)
add_executable (hyld9767-example hyld9767.cxx)
add_executable (mg811-example mg811.cxx)
include_directories (${PROJECT_SOURCE_DIR}/src/hmc5883l)
include_directories (${PROJECT_SOURCE_DIR}/src/grove)
@ -241,6 +242,7 @@ include_directories (${PROJECT_SOURCE_DIR}/src/hp20x)
include_directories (${PROJECT_SOURCE_DIR}/src/pn532)
include_directories (${PROJECT_SOURCE_DIR}/src/lsm9ds0)
include_directories (${PROJECT_SOURCE_DIR}/src/hyld9767)
include_directories (${PROJECT_SOURCE_DIR}/src/mg811)
target_link_libraries (hmc5883l-example hmc5883l ${CMAKE_THREAD_LIBS_INIT})
target_link_libraries (groveled-example grove ${CMAKE_THREAD_LIBS_INIT})
@ -376,3 +378,4 @@ target_link_libraries (ak8975-example mpu9150 ${CMAKE_THREAD_LIBS_INIT})
target_link_libraries (lsm9ds0-example lsm9ds0 ${CMAKE_THREAD_LIBS_INIT})
target_link_libraries (eboled-example i2clcd ${CMAKE_THREAD_LIBS_INIT})
target_link_libraries (hyld9767-example hyld9767 ${CMAKE_THREAD_LIBS_INIT})
target_link_libraries (mg811-example mg811 ${CMAKE_THREAD_LIBS_INIT})

68
examples/c++/mg811.cxx Normal file
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@ -0,0 +1,68 @@
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2015 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <iostream>
#include <signal.h>
#include "mg811.h"
using namespace std;
bool shouldRun = true;
#define MG811_AREF 5.0
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate an MG811 on analog pin A0, and digital pin D2 with an
// analog reference voltage of MG811_AREF (5.0)
upm::MG811 *sensor = new upm::MG811(0, 2, MG811_AREF);
// Every tenth of a second, sample the sensor and output it's
// detected CO2 concentration in parts per million (ppm)
while (shouldRun)
{
cout << "CO2 concentration in PPM: " << sensor->ppm() << endl;
usleep(100000);
}
//! [Interesting]
cout << "Exiting" << endl;
delete sensor;
return 0;
}