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cwlsxxa: Initial implementation

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The driver was developed using the Veris CWLSHTA CO2 Gas sensor.  The
'T' variant supports a temperature sensor, and the 'H' variant
supports a humidity sensor.

All 3 signals are provided by the device as analog 0-5Vdc, 0-10Vdc, or
4-20ma loop current outputs.  For devices supporting temperature, the
valid temperature range is 10C to 50C.  The humidity ranges from 0% to
100% (non-condensing).  The CO2 sensor ranges from 0 to 2000 ppm.

This driver was developed using the 5Vdc outputs and the 4-20ma
outputs.  For voltage outputs, your MCU must be configured for 5V
operation.  In addition, you must configure the sensor (via it's
configuration switches) to output 0-5VDC only.  Using any other analog
reference voltage will require the appropriate external circuitry
(such as a voltage divider) in order to interface safely with your
MCU.

In addition, the sensor can be configured for 4-20ma usage, by
specifying the correct receiver resistance (in ohms) in the
constructor.  This sensor was tested with a Cooking Hacks (Libelium)
4-channel 4-20ma Arduino interface shield.  For this interface, the
receiver resistance was specified as 165.0 ohms.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>
This commit is contained in:
Jon Trulson 2016-02-19 17:58:44 -07:00 committed by Abhishek Malik
parent f3a2e0d77c
commit a8d96bd2d9
12 changed files with 692 additions and 0 deletions
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1
examples/c++/CMakeLists.txt
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@ -248,6 +248,7 @@ add_example (max44009)
add_example (si1132)
add_example (si7005)
add_example (t6713)
add_example (cwlsxxa)
# These are special cases where you specify example binary, source file and module(s)
include_directories (${PROJECT_SOURCE_DIR}/src)

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examples/c++/cwlsxxa.cxx Normal file
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@ -0,0 +1,82 @@
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 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 "cwlsxxa.h"
using namespace std;
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main(int argc, char **argv)
{
signal(SIGINT, sig_handler);
//! [Interesting]
cout << "Initializing..." << endl;
// Instantiate an CWLSXXA instance, using A0 for CO2, A1 for
// humidity and A2 for temperature
upm::CWLSXXA *sensor = new upm::CWLSXXA(0, 1, 2);
// update and print available values every second
while (shouldRun)
{
// update our values from the sensor
sensor->update();
// we show both C and F for temperature
cout << "Temperature: " << sensor->getTemperature()
<< " C / " << sensor->getTemperature(true) << " F"
<< endl;
cout << "Humidity: " << sensor->getHumidity()
<< " %" << endl;
cout << "CO2: " << sensor->getCO2()
<< " ppm" << endl;
cout << endl;
sleep(1);
}
cout << "Exiting..." << endl;
delete sensor;
//! [Interesting]
return 0;
}

1
examples/java/CMakeLists.txt
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@ -105,6 +105,7 @@ add_example(Ad8232Example ad8232)
add_example(Gp2y0aExample gp2y0a)
add_example(Th02Example th02)
add_example(FlexSensorExample flex)
add_example(CWLSXXA_Example cwlsxxa)
add_example_with_path(Jhd1313m1_lcdSample lcd/upm_i2clcd.jar)

62
examples/java/CWLSXXA_Example.java Normal file
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@ -0,0 +1,62 @@
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 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.
*/
import upm_cwlsxxa.CWLSXXA;
public class CWLSXXA_Example
{
public static void main(String[] args) throws InterruptedException
{
// ! [Interesting]
// Instantiate an CWLSXXA instance, using A0 for CO2, A1 for
// humidity and A2 for temperature
CWLSXXA sensor = new CWLSXXA(0, 1, 2);
while (true)
{
// update our values from the sensor
sensor.update();
// we show both C and F for temperature
System.out.println("Temperature: "
+ sensor.getTemperature()
+ " C / "
+ sensor.getTemperature(true)
+ " F");
System.out.println("Humidity: "
+ sensor.getHumidity()
+ " %");
System.out.println("CO2: "
+ sensor.getCO2()
+ " ppm");
Thread.sleep(1000);
}
// ! [Interesting]
}
}

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examples/javascript/cwlsxxa.js Normal file
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@ -0,0 +1,66 @@
/*jslint node:true, vars:true, bitwise:true, unparam:true */
/*jshint unused:true */
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 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.
*/
var sensorObj = require('jsupm_cwlsxxa');
/************** Main code **************/
console.log("Initializing...");
// Instantiate an CWLSXXA instance, using A0 for CO2, A1 for
// humidity and A2 for temperature
var sensor = new sensorObj.CWLSXXA(0, 1, 2);
// update and print available values every second
setInterval(function()
{
// update our values from the sensor
sensor.update();
// we show both C and F for temperature
console.log("Temperature:", sensor.getTemperature(),
"C /", sensor.getTemperature(true), "F");
console.log("Humidity:", sensor.getHumidity(), "%");
console.log("CO2:", sensor.getCO2(), "ppm");
console.log("");
}, 1000);
process.on('SIGINT', function()
{
sensor = null;
sensorObj.cleanUp();
sensorObj = null;
console.log("Exiting...");
process.exit(0);
});

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examples/python/cwlsxxa.py Normal file
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@ -0,0 +1,61 @@
#!/usr/bin/python
# Author: Jon Trulson <jtrulson@ics.com>
# Copyright (c) 2016 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.
import time, sys, signal, atexit
import pyupm_cwlsxxa as sensorObj
## Exit handlers ##
# This function stops python from printing a stacktrace when you hit control-C
def SIGINTHandler(signum, frame):
raise SystemExit
# This function lets you run code on exit
def exitHandler():
print "Exiting"
sys.exit(0)
# Register exit handlers
atexit.register(exitHandler)
signal.signal(signal.SIGINT, SIGINTHandler)
print "Initializing..."
# Instantiate an CWLSXXA instance, using A0 for CO2, A1 for
# humidity and A2 for temperature
sensor = sensorObj.CWLSXXA(0, 1, 2)
# update and print available values every second
while (1):
# update our values from the sensor
sensor.update()
# we show both C and F for temperature
print "Temperature:", sensor.getTemperature(), "C /",
print sensor.getTemperature(True), "F"
print "Humidity:", sensor.getHumidity(), "%"
print "CO2:", sensor.getCO2(), "ppm"
print
time.sleep(1)

5
src/cwlsxxa/CMakeLists.txt Normal file
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@ -0,0 +1,5 @@
set (libname "cwlsxxa")
set (libdescription "upm Veris CWLSXXA CO2/Temperature/Humidity transmitter")
set (module_src ${libname}.cxx)
set (module_h ${libname}.h)
upm_module_init()

183
src/cwlsxxa/cwlsxxa.cxx Normal file
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@ -0,0 +1,183 @@
/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 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 <iostream>
#include "cwlsxxa.h"
using namespace upm;
using namespace std;
// for current loop reads that seems a little noisy, we average over
// several aio reads.
static const int maxSamples = 50;
// conversion from celcius to fahrenheit
static float c2f(float c)
{
return (c * (9.0 / 5.0) + 32.0);
}
CWLSXXA::CWLSXXA(int gPin, int hPin, int tPin, float rResistor, float aref) :
m_aioCO2(gPin), m_aioHum(0), m_aioTemp(0)
{
m_hasHum = (hPin >= 0) ? true : false;
m_hasTemp = (tPin >= 0) ? true : false;
if (m_hasTemp)
{
m_aioTemp = new mraa::Aio(tPin);
m_aResTemp = (1 << m_aioTemp->getBit());
}
else
m_aResTemp = 0;
if (m_hasHum)
{
m_aioHum = new mraa::Aio(hPin);
m_aResHum = (1 << m_aioHum->getBit());
}
else
m_aResHum = 0;
m_aResCO2 = (1 << m_aioCO2.getBit());
m_temperature = 0.0;
m_humidity = 0.0;
m_co2 = 0.0;
m_aref = aref;
m_rResistor = rResistor;
}
CWLSXXA::~CWLSXXA()
{
if (m_aioHum)
delete m_aioHum;
if (m_aioTemp)
delete m_aioTemp;
}
void CWLSXXA::update()
{
// temperature
int val;
float volts;
float milliamps = 0.0;
int samples;
if (m_rResistor)
samples = maxSamples;
else
samples = 1;
// temperature
if (m_hasTemp)
{
// fortunately, this sensor always reports temperatures in C,
// regardless of the configuration of the LCD display (for
// models that have an LCD display)
val = average(m_aioTemp, samples);
volts = (float(val) * (m_aref / m_aResTemp));
// valid range is 10-35C, current loop range is 16ma (20ma - 4ma)
if (!m_rResistor)
m_temperature = ((volts / m_aref) * 25.0) + 10.0;
else
{
milliamps = ((volts / m_rResistor * 1000.0) - 4.0);
if (milliamps < 0.0) // not connected
milliamps = 0.0;
m_temperature = (milliamps * (25.0 / 16.0)) + 10.0;
}
}
// humidity
if (m_hasHum)
{
val = average(m_aioHum, samples);
volts = (float(val) * (m_aref / m_aResHum));
// range is 0-100
if (!m_rResistor)
m_humidity = ((volts / m_aref) * 100.0);
else
{
milliamps = ((volts / m_rResistor * 1000.0) - 4.0);
if (milliamps < 0.0) // not connected
milliamps = 0.0;
m_humidity = milliamps * (100.0 / 16.0);
}
}
// CO2
val = average(&m_aioCO2, samples);
volts = (float(val) * (m_aref / m_aResCO2));
// CO2 range is 0-2000ppm
if (!m_rResistor)
m_co2 = ((volts / m_aref) * 2000.0);
else
{
milliamps = ((volts / m_rResistor * 1000.0) - 4.0);
if (milliamps < 0.0) // not connected
milliamps = 0.0;
m_co2 = milliamps * (2000.0 / 16.0);
}
}
float CWLSXXA::getTemperature(bool fahrenheit)
{
if (fahrenheit)
return c2f(m_temperature);
else
return m_temperature;
}
float CWLSXXA::getHumidity()
{
return m_humidity;
}
float CWLSXXA::getCO2()
{
return m_co2;
}
int CWLSXXA::average(mraa::Aio *aio, int samples)
{
if (samples <= 0)
samples = 1;
int avg = 0;
for (int i=0; i<samples; i++)
avg += aio->read();
return (avg / samples);
}

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src/cwlsxxa/cwlsxxa.h Normal file
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/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2016 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.
*/
#pragma once
#include <string>
#include <iostream>
#include <mraa/aio.hpp>
// Unlikey to be changable without external circuitry (voltage divider)
#define CWLSXXA_DEFAULT_AREF 5.0
namespace upm {
/**
* @brief Veris CWLSXXA CO2 Sensor
* @defgroup cwlsxxa libupm-cwlsxxa
* @ingroup veris ainput temp gaseous
*/
/**
* @library cwlsxxa
* @sensor cwlsxxa
* @comname Veris CWLSXXA CO2 Sensor Family
* @type temp gaseous
* @man veris
* @con ainput
* @web http://www.veris.com/Item/CWLSHTA.aspx
*
* @brief API for the Veris CWLSXXA CO2 Sensor Family
*
* The driver was developed using the CWLSHTA CO2 Gas sensor. The
* 'T' variant supports a temperature transmitter, and the 'H'
* variant supports a humidity sensor. All 3 signals are provided
* by the device as analog 0-5Vdc, 0-10Vdc, or 4-20ma loop current
* outputs. For devices supporting temperature, the valid
* temperature range is 10C to 50C. The humidity ranges from 0%
* to 100% (non-condensing). The CO2 sensor ranges from 0 to 2000
* ppm.
*
* This driver was developed using the 5Vdc outputs and the 4-20ma
* outputs. For voltage outputs, your MCU must be configured for
* 5V operation. In addition, you must configure the sensor (via
* it's configuration switches) to output 0-5VDC only. Using any
* other analog reference voltage will require the appropriate
* external circuitry (such as a voltage divider) in order to
* interface safely with your MCU.
*
* In addition, the sensor can be configured for 4-20ma usage, by
* specifying the correct receiver resistance (in ohms) in the
* constructor. This sensor was tested with a Cooking Hacks
* (Libelium) 4-channel 4-20ma Arduino interface shield. For this
* interface, the receiver resistance was specified as 165.0 ohms.
*
* For devices which do not support temperature, use '-1' as the
* temperature pin number in the object constructor. If
* temperature measurement is disabled, getTemperature() will always
* return 0C/32F.
*
* For devices which do not support humidity, use '-1' as the
* temperature pin number in the object constructor. If
* humidity measurement is disabled, getHumidity() will always
* return 0.
*
* @snippet cwlsxxa.cxx Interesting
*/
class CWLSXXA {
public:
/**
* CWLSXXA object constructor
*
* @param gPin Analog pin to use for the CO2 measurement
* @param hPin Analog pin to use for the humidity measurement. If
* your device does not support humidity, use -1 as the value so
* that humidity will not be queried and an analog pin won't be
* wasted.
* @param tPin Analog pin to use for temperature. If your device
* does not support temperature, use -1 as the value so that
* temperature will not be queried and an analog pin won't be
* wasted.
* @param rResistor The receiver resistance in ohms, when using a
* 4-20ma current loop interface. When specified, this value will
* be used in computing the current based on the voltage read when
* scaling the return values. Default is 0.0, for standard
* scaling based on voltage output rather than current (4-20ma
* mode).
* @param aref The analog reference voltage, default 5.0
*/
CWLSXXA(int gPin, int hPin, int tPin, float rResistor=0.0,
float aref=CWLSXXA_DEFAULT_AREF);
/**
* CWLSXXA object destructor
*/
~CWLSXXA();
/**
* Read current values from the sensor and update internal stored
* values. This method must be called prior to querying any
* values, such as CO2, temperature, or humidity.
*/
void update();
/**
* Get the current temperature. update() must have been called
* prior to calling this method. If temperature measurement was
* disabled (by passing -1 as the temperature pin in the
* constructor) then this function will always return 0C/32F.
*
* @param fahrenheit true to return the temperature in degrees
* fahrenheit, false to return the temperature in degrees celcius.
* The default is false (degrees Celcius).
* @return The last temperature reading in Celcius or Fahrenheit
*/
float getTemperature(bool fahrenheit=false);
/**
* Get the current relative humidity. update() must have been called
* prior to calling this method. If humidity measurement was
* disabled (by passing -1 as the te pin in the
* constructor) then this function will always return 0.
*
* @return The last humidity reading
*/
float getHumidity();
/**
* Get the current CO2 concentration in Parts Per Million (PPM).
* update() must have been called prior to calling this method.
*
* @return The last CO2 reading
*/
float getCO2();
protected:
// temperature and humidity are optional features of this transmitter
mraa::Aio *m_aioTemp;
mraa::Aio *m_aioHum;
// CO2 reporting is always supported
mraa::Aio m_aioCO2;
private:
float m_aref;
float m_rResistor;
int m_aResTemp;
int m_aResHum;
int m_aResCO2;
// does this sensor support temperature and/or humidity reporting?
bool m_hasTemp;
bool m_hasHum;
// in Celcius
float m_temperature;
float m_humidity;
// in PPM
float m_co2;
int average(mraa::Aio *aio, int samples);
};
}

19
src/cwlsxxa/javaupm_cwlsxxa.i Normal file
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%module javaupm_cwlsxxa
%include "../upm.i"
%include "std_string.i"
%include "cwlsxxa.h"
%{
#include "cwlsxxa.h"
%}
%pragma(java) jniclasscode=%{
static {
try {
System.loadLibrary("javaupm_cwlsxxa");
} catch (UnsatisfiedLinkError e) {
System.err.println("Native code library failed to load. \n" + e);
System.exit(1);
}
}
%}

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src/cwlsxxa/jsupm_cwlsxxa.i Normal file
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@ -0,0 +1,10 @@
%module jsupm_cwlsxxa
%include "../upm.i"
%include "std_string.i"
%{
#include "cwlsxxa.h"
%}
%include "cwlsxxa.h"

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src/cwlsxxa/pyupm_cwlsxxa.i Normal file
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// Include doxygen-generated documentation
%include "pyupm_doxy2swig.i"
%module pyupm_cwlsxxa
%include "../upm.i"
%include "std_string.i"
%feature("autodoc", "3");
%{
#include "cwlsxxa.h"
%}
%include "cwlsxxa.h"