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yocto_carbondioxide.py
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yocto_carbondioxide.py
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#*********************************************************************
#*
#* $Id: yocto_carbondioxide.py 25833 2016-11-08 16:55:24Z seb $
#*
#* Implements yFindCarbonDioxide(), the high-level API for CarbonDioxide functions
#*
#* - - - - - - - - - License information: - - - - - - - - -
#*
#* Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
#*
#* Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
#* non-exclusive license to use, modify, copy and integrate this
#* file into your software for the sole purpose of interfacing
#* with Yoctopuce products.
#*
#* You may reproduce and distribute copies of this file in
#* source or object form, as long as the sole purpose of this
#* code is to interface with Yoctopuce products. You must retain
#* this notice in the distributed source file.
#*
#* You should refer to Yoctopuce General Terms and Conditions
#* for additional information regarding your rights and
#* obligations.
#*
#* THE SOFTWARE AND DOCUMENTATION ARE PROVIDED 'AS IS' WITHOUT
#* WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
#* WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS
#* FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO
#* EVENT SHALL LICENSOR BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
#* INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
#* COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR
#* SERVICES, ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
#* LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
#* CONTRIBUTION, OR OTHER SIMILAR COSTS, WHETHER ASSERTED ON THE
#* BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF
#* WARRANTY, OR OTHERWISE.
#*
#*********************************************************************/
__docformat__ = 'restructuredtext en'
from yocto_api import *
#--- (YCarbonDioxide class start)
#noinspection PyProtectedMember
class YCarbonDioxide(YSensor):
"""
The Yoctopuce class YCarbonDioxide allows you to read and configure Yoctopuce CO2
sensors. It inherits from YSensor class the core functions to read measurements,
register callback functions, access to the autonomous datalogger.
This class adds the ability to perform manual calibration if reuired.
"""
#--- (end of YCarbonDioxide class start)
#--- (YCarbonDioxide return codes)
#--- (end of YCarbonDioxide return codes)
#--- (YCarbonDioxide dlldef)
#--- (end of YCarbonDioxide dlldef)
#--- (YCarbonDioxide definitions)
ABCPERIOD_INVALID = YAPI.INVALID_INT
COMMAND_INVALID = YAPI.INVALID_STRING
#--- (end of YCarbonDioxide definitions)
def __init__(self, func):
super(YCarbonDioxide, self).__init__(func)
self._className = 'CarbonDioxide'
#--- (YCarbonDioxide attributes)
self._callback = None
self._abcPeriod = YCarbonDioxide.ABCPERIOD_INVALID
self._command = YCarbonDioxide.COMMAND_INVALID
#--- (end of YCarbonDioxide attributes)
#--- (YCarbonDioxide implementation)
def _parseAttr(self, member):
if member.name == "abcPeriod":
self._abcPeriod = member.ivalue
return 1
if member.name == "command":
self._command = member.svalue
return 1
super(YCarbonDioxide, self)._parseAttr(member)
def get_abcPeriod(self):
"""
Returns the Automatic Baseline Calibration period, in hours. A negative value
means that automatic baseline calibration is disabled.
@return an integer corresponding to the Automatic Baseline Calibration period, in hours
On failure, throws an exception or returns YCarbonDioxide.ABCPERIOD_INVALID.
"""
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YCarbonDioxide.ABCPERIOD_INVALID
return self._abcPeriod
def set_abcPeriod(self, newval):
"""
Modifies Automatic Baseline Calibration period, in hours. If you need
to disable automatic baseline calibration (for instance when using the
sensor in an environment that is constantly above 400ppm CO2), set the
period to -1. Remember to call the saveToFlash() method of the
module if the modification must be kept.
@param newval : an integer
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
rest_val = str(newval)
return self._setAttr("abcPeriod", rest_val)
def get_command(self):
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YCarbonDioxide.COMMAND_INVALID
return self._command
def set_command(self, newval):
rest_val = newval
return self._setAttr("command", rest_val)
@staticmethod
def FindCarbonDioxide(func):
"""
Retrieves a CO2 sensor for a given identifier.
The identifier can be specified using several formats:
<ul>
<li>FunctionLogicalName</li>
<li>ModuleSerialNumber.FunctionIdentifier</li>
<li>ModuleSerialNumber.FunctionLogicalName</li>
<li>ModuleLogicalName.FunctionIdentifier</li>
<li>ModuleLogicalName.FunctionLogicalName</li>
</ul>
This function does not require that the CO2 sensor is online at the time
it is invoked. The returned object is nevertheless valid.
Use the method YCarbonDioxide.isOnline() to test if the CO2 sensor is
indeed online at a given time. In case of ambiguity when looking for
a CO2 sensor by logical name, no error is notified: the first instance
found is returned. The search is performed first by hardware name,
then by logical name.
@param func : a string that uniquely characterizes the CO2 sensor
@return a YCarbonDioxide object allowing you to drive the CO2 sensor.
"""
# obj
obj = YFunction._FindFromCache("CarbonDioxide", func)
if obj is None:
obj = YCarbonDioxide(func)
YFunction._AddToCache("CarbonDioxide", func, obj)
return obj
def triggerBaselineCalibration(self):
"""
Triggers a baseline calibration at standard CO2 ambiant level (400ppm).
It is normally not necessary to manually calibrate the sensor, because
the built-in automatic baseline calibration procedure will automatically
fix any long-term drift based on the lowest level of CO2 observed over the
automatic calibration period. However, if you disable automatic baseline
calibration, you may want to manually trigger a calibration from time to
time. Before starting a baseline calibration, make sure to put the sensor
in a standard environment (e.g. outside in fresh air) at around 400ppm.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.set_command("BC")
def triggetBaselineCalibration(self):
# // may throw an exception
return self.triggerBaselineCalibration()
def triggerZeroCalibration(self):
"""
Triggers a zero calibration of the sensor on carbon dioxide-free air.
It is normally not necessary to manually calibrate the sensor, because
the built-in automatic baseline calibration procedure will automatically
fix any long-term drift based on the lowest level of CO2 observed over the
automatic calibration period. However, if you disable automatic baseline
calibration, you may want to manually trigger a calibration from time to
time. Before starting a zero calibration, you should circulate carbon
dioxide-free air within the sensor for a minute or two, using a small pipe
connected to the sensor. Please contact support@yoctopuce.com for more details
on the zero calibration procedure.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.set_command("ZC")
def triggetZeroCalibration(self):
# // may throw an exception
return self.triggerZeroCalibration()
def nextCarbonDioxide(self):
"""
Continues the enumeration of CO2 sensors started using yFirstCarbonDioxide().
@return a pointer to a YCarbonDioxide object, corresponding to
a CO2 sensor currently online, or a None pointer
if there are no more CO2 sensors to enumerate.
"""
hwidRef = YRefParam()
if YAPI.YISERR(self._nextFunction(hwidRef)):
return None
if hwidRef.value == "":
return None
return YCarbonDioxide.FindCarbonDioxide(hwidRef.value)
#--- (end of YCarbonDioxide implementation)
#--- (CarbonDioxide functions)
@staticmethod
def FirstCarbonDioxide():
"""
Starts the enumeration of CO2 sensors currently accessible.
Use the method YCarbonDioxide.nextCarbonDioxide() to iterate on
next CO2 sensors.
@return a pointer to a YCarbonDioxide object, corresponding to
the first CO2 sensor currently online, or a None pointer
if there are none.
"""
devRef = YRefParam()
neededsizeRef = YRefParam()
serialRef = YRefParam()
funcIdRef = YRefParam()
funcNameRef = YRefParam()
funcValRef = YRefParam()
errmsgRef = YRefParam()
size = YAPI.C_INTSIZE
#noinspection PyTypeChecker,PyCallingNonCallable
p = (ctypes.c_int * 1)()
err = YAPI.apiGetFunctionsByClass("CarbonDioxide", 0, p, size, neededsizeRef, errmsgRef)
if YAPI.YISERR(err) or not neededsizeRef.value:
return None
if YAPI.YISERR(
YAPI.yapiGetFunctionInfo(p[0], devRef, serialRef, funcIdRef, funcNameRef, funcValRef, errmsgRef)):
return None
return YCarbonDioxide.FindCarbonDioxide(serialRef.value + "." + funcIdRef.value)
#--- (end of CarbonDioxide functions)

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