' ********************************************************************
'
'  $Id: svn_id $
'
'  Implements yFindCarbonDioxide(), the high-level API for CarbonDioxide functions
'
'  - - - - - - - - - License information: - - - - - - - - -
'
'  Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
'
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' *********************************************************************


Imports YDEV_DESCR = System.Int32
Imports YFUN_DESCR = System.Int32
Imports System.Runtime.InteropServices
Imports System.Text

Module yocto_carbondioxide

    REM --- (YCarbonDioxide return codes)
    REM --- (end of YCarbonDioxide return codes)
    REM --- (YCarbonDioxide dlldef)
    REM --- (end of YCarbonDioxide dlldef)
   REM --- (YCarbonDioxide yapiwrapper)
   REM --- (end of YCarbonDioxide yapiwrapper)
  REM --- (YCarbonDioxide globals)

  Public Const Y_ABCPERIOD_INVALID As Integer = YAPI.INVALID_INT
  Public Const Y_COMMAND_INVALID As String = YAPI.INVALID_STRING
  Public Delegate Sub YCarbonDioxideValueCallback(ByVal func As YCarbonDioxide, ByVal value As String)
  Public Delegate Sub YCarbonDioxideTimedReportCallback(ByVal func As YCarbonDioxide, ByVal measure As YMeasure)
  REM --- (end of YCarbonDioxide globals)

  REM --- (YCarbonDioxide class start)

  '''*
  ''' <summary>
  '''   The <c>YCarbonDioxide</c> class allows you to read and configure Yoctopuce CO2 sensors.
  ''' <para>
  '''   It inherits from <c>YSensor</c> class the core functions to read measurements,
  '''   to register callback functions, and to access the autonomous datalogger.
  '''   This class adds the ability to perform manual calibration if required.
  ''' </para>
  ''' </summary>
  '''/
  Public Class YCarbonDioxide
    Inherits YSensor
    REM --- (end of YCarbonDioxide class start)

    REM --- (YCarbonDioxide definitions)
    Public Const ABCPERIOD_INVALID As Integer = YAPI.INVALID_INT
    Public Const COMMAND_INVALID As String = YAPI.INVALID_STRING
    REM --- (end of YCarbonDioxide definitions)

    REM --- (YCarbonDioxide attributes declaration)
    Protected _abcPeriod As Integer
    Protected _command As String
    Protected _valueCallbackCarbonDioxide As YCarbonDioxideValueCallback
    Protected _timedReportCallbackCarbonDioxide As YCarbonDioxideTimedReportCallback
    REM --- (end of YCarbonDioxide attributes declaration)

    Public Sub New(ByVal func As String)
      MyBase.New(func)
      _classname = "CarbonDioxide"
      REM --- (YCarbonDioxide attributes initialization)
      _abcPeriod = ABCPERIOD_INVALID
      _command = COMMAND_INVALID
      _valueCallbackCarbonDioxide = Nothing
      _timedReportCallbackCarbonDioxide = Nothing
      REM --- (end of YCarbonDioxide attributes initialization)
    End Sub

    REM --- (YCarbonDioxide private methods declaration)

    Protected Overrides Function _parseAttr(ByRef json_val As YJSONObject) As Integer
      If json_val.has("abcPeriod") Then
        _abcPeriod = CInt(json_val.getLong("abcPeriod"))
      End If
      If json_val.has("command") Then
        _command = json_val.getString("command")
      End If
      Return MyBase._parseAttr(json_val)
    End Function

    REM --- (end of YCarbonDioxide private methods declaration)

    REM --- (YCarbonDioxide public methods declaration)
    '''*
    ''' <summary>
    '''   Returns the Automatic Baseline Calibration period, in hours.
    ''' <para>
    '''   A negative value
    '''   means that automatic baseline calibration is disabled.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <returns>
    '''   an integer corresponding to the Automatic Baseline Calibration period, in hours
    ''' </returns>
    ''' <para>
    '''   On failure, throws an exception or returns <c>YCarbonDioxide.ABCPERIOD_INVALID</c>.
    ''' </para>
    '''/
    Public Function get_abcPeriod() As Integer
      Dim res As Integer = 0
      If (Me._cacheExpiration <= YAPI.GetTickCount()) Then
        If (Me.load(YAPI._yapiContext.GetCacheValidity()) <> YAPI.SUCCESS) Then
          Return ABCPERIOD_INVALID
        End If
      End If
      res = Me._abcPeriod
      Return res
    End Function


    '''*
    ''' <summary>
    '''   Changes Automatic Baseline Calibration period, in hours.
    ''' <para>
    '''   If you need
    '''   to disable automatic baseline calibration (for instance when using the
    '''   sensor in an environment that is constantly above 400 ppm CO2), set the
    '''   period to -1. For the Yocto-CO2-V2, the only possible values are 24 and -1.
    '''   Remember to call the <c>saveToFlash()</c> method of the
    '''   module if the modification must be kept.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <param name="newval">
    '''   an integer corresponding to Automatic Baseline Calibration period, in hours
    ''' </param>
    ''' <para>
    ''' </para>
    ''' <returns>
    '''   <c>YAPI.SUCCESS</c> if the call succeeds.
    ''' </returns>
    ''' <para>
    '''   On failure, throws an exception or returns a negative error code.
    ''' </para>
    '''/
    Public Function set_abcPeriod(ByVal newval As Integer) As Integer
      Dim rest_val As String
      rest_val = Ltrim(Str(newval))
      Return _setAttr("abcPeriod", rest_val)
    End Function
    Public Function get_command() As String
      Dim res As String
      If (Me._cacheExpiration <= YAPI.GetTickCount()) Then
        If (Me.load(YAPI._yapiContext.GetCacheValidity()) <> YAPI.SUCCESS) Then
          Return COMMAND_INVALID
        End If
      End If
      res = Me._command
      Return res
    End Function


    Public Function set_command(ByVal newval As String) As Integer
      Dim rest_val As String
      rest_val = newval
      Return _setAttr("command", rest_val)
    End Function
    '''*
    ''' <summary>
    '''   Retrieves a CO2 sensor for a given identifier.
    ''' <para>
    '''   The identifier can be specified using several formats:
    ''' </para>
    ''' <para>
    ''' </para>
    ''' <para>
    '''   - FunctionLogicalName
    ''' </para>
    ''' <para>
    '''   - ModuleSerialNumber.FunctionIdentifier
    ''' </para>
    ''' <para>
    '''   - ModuleSerialNumber.FunctionLogicalName
    ''' </para>
    ''' <para>
    '''   - ModuleLogicalName.FunctionIdentifier
    ''' </para>
    ''' <para>
    '''   - ModuleLogicalName.FunctionLogicalName
    ''' </para>
    ''' <para>
    ''' </para>
    ''' <para>
    '''   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 <c>YCarbonDioxide.isOnline()</c> 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.
    ''' </para>
    ''' <para>
    '''   If a call to this object's is_online() method returns FALSE although
    '''   you are certain that the matching device is plugged, make sure that you did
    '''   call registerHub() at application initialization time.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <param name="func">
    '''   a string that uniquely characterizes the CO2 sensor, for instance
    '''   <c>YCO2MK02.carbonDioxide</c>.
    ''' </param>
    ''' <returns>
    '''   a <c>YCarbonDioxide</c> object allowing you to drive the CO2 sensor.
    ''' </returns>
    '''/
    Public Shared Function FindCarbonDioxide(func As String) As YCarbonDioxide
      Dim obj As YCarbonDioxide
      obj = CType(YFunction._FindFromCache("CarbonDioxide", func), YCarbonDioxide)
      If ((obj Is Nothing)) Then
        obj = New YCarbonDioxide(func)
        YFunction._AddToCache("CarbonDioxide", func, obj)
      End If
      Return obj
    End Function

    '''*
    ''' <summary>
    '''   Registers the callback function that is invoked on every change of advertised value.
    ''' <para>
    '''   The callback is then invoked only during the execution of <c>ySleep</c> or <c>yHandleEvents</c>.
    '''   This provides control over the time when the callback is triggered. For good responsiveness,
    '''   remember to call one of these two functions periodically. The callback is called once juste after beeing
    '''   registered, passing the current advertised value  of the function, provided that it is not an empty string.
    '''   To unregister a callback, pass a Nothing pointer as argument.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <param name="callback">
    '''   the callback function to call, or a Nothing pointer. The callback function should take two
    '''   arguments: the function object of which the value has changed, and the character string describing
    '''   the new advertised value.
    ''' @noreturn
    ''' </param>
    '''/
    Public Overloads Function registerValueCallback(callback As YCarbonDioxideValueCallback) As Integer
      Dim val As String
      If (Not (callback Is Nothing)) Then
        YFunction._UpdateValueCallbackList(Me, True)
      Else
        YFunction._UpdateValueCallbackList(Me, False)
      End If
      Me._valueCallbackCarbonDioxide = callback
      REM // Immediately invoke value callback with current value
      If (Not (callback Is Nothing) AndAlso Me.isOnline()) Then
        val = Me._advertisedValue
        If (Not (val = "")) Then
          Me._invokeValueCallback(val)
        End If
      End If
      Return 0
    End Function

    Public Overrides Function _invokeValueCallback(value As String) As Integer
      If (Not (Me._valueCallbackCarbonDioxide Is Nothing)) Then
        Me._valueCallbackCarbonDioxide(Me, value)
      Else
        MyBase._invokeValueCallback(value)
      End If
      Return 0
    End Function

    '''*
    ''' <summary>
    '''   Registers the callback function that is invoked on every periodic timed notification.
    ''' <para>
    '''   The callback is invoked only during the execution of <c>ySleep</c> or <c>yHandleEvents</c>.
    '''   This provides control over the time when the callback is triggered. For good responsiveness, remember to call
    '''   one of these two functions periodically. To unregister a callback, pass a Nothing pointer as argument.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <param name="callback">
    '''   the callback function to call, or a Nothing pointer. The callback function should take two
    '''   arguments: the function object of which the value has changed, and an <c>YMeasure</c> object describing
    '''   the new advertised value.
    ''' @noreturn
    ''' </param>
    '''/
    Public Overloads Function registerTimedReportCallback(callback As YCarbonDioxideTimedReportCallback) As Integer
      Dim sensor As YSensor
      sensor = Me
      If (Not (callback Is Nothing)) Then
        YFunction._UpdateTimedReportCallbackList(sensor, True)
      Else
        YFunction._UpdateTimedReportCallbackList(sensor, False)
      End If
      Me._timedReportCallbackCarbonDioxide = callback
      Return 0
    End Function

    Public Overrides Function _invokeTimedReportCallback(value As YMeasure) As Integer
      If (Not (Me._timedReportCallbackCarbonDioxide Is Nothing)) Then
        Me._timedReportCallbackCarbonDioxide(Me, value)
      Else
        MyBase._invokeTimedReportCallback(value)
      End If
      Return 0
    End Function

    '''*
    ''' <summary>
    '''   Triggers a forced calibration of the sensor at a given CO2 level, specified
    '''   between 400ppm and 2000ppm.
    ''' <para>
    '''   Before invoking this command, the sensor must
    '''   have been maintained within the specified CO2 density during at least two
    '''   minutes.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <param name="refVal">
    '''   reference CO2 density for the calibration
    ''' </param>
    ''' <returns>
    '''   <c>YAPI.SUCCESS</c> if the call succeeds.
    ''' </returns>
    ''' <para>
    '''   On failure, throws an exception or returns a negative error code.
    ''' </para>
    '''/
    Public Overridable Function triggerForcedCalibration(refVal As Double) As Integer
      Return Me.set_command("F" + Convert.ToString(CType(Math.Round(refVal), Integer)) + "C")
    End Function

    '''*
    ''' <summary>
    '''   Triggers a baseline calibration at standard CO2 ambiant level (400ppm).
    ''' <para>
    '''   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 automatic baseline calibration
    '''   is disabled, 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 400 ppm
    '''   for at least two minutes.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <returns>
    '''   <c>YAPI.SUCCESS</c> if the call succeeds.
    ''' </returns>
    ''' <para>
    '''   On failure, throws an exception or returns a negative error code.
    ''' </para>
    '''/
    Public Overridable Function triggerBaselineCalibration() As Integer
      Return Me.set_command("BC")
    End Function

    Public Overridable Function triggetBaselineCalibration() As Integer
      Return Me.triggerBaselineCalibration()
    End Function

    '''*
    ''' <summary>
    '''   Triggers a zero calibration of the sensor on carbon dioxide-free air -
    '''   for use with first generation Yocto-CO2 only.
    ''' <para>
    '''   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.
    ''' </para>
    ''' <para>
    ''' </para>
    ''' </summary>
    ''' <returns>
    '''   <c>YAPI.SUCCESS</c> if the call succeeds.
    ''' </returns>
    ''' <para>
    '''   On failure, throws an exception or returns a negative error code.
    ''' </para>
    '''/
    Public Overridable Function triggerZeroCalibration() As Integer
      Return Me.set_command("ZC")
    End Function

    Public Overridable Function triggetZeroCalibration() As Integer
      Return Me.triggerZeroCalibration()
    End Function


    '''*
    ''' <summary>
    '''   Continues the enumeration of CO2 sensors started using <c>yFirstCarbonDioxide()</c>.
    ''' <para>
    '''   Caution: You can't make any assumption about the returned CO2 sensors order.
    '''   If you want to find a specific a CO2 sensor, use <c>CarbonDioxide.findCarbonDioxide()</c>
    '''   and a hardwareID or a logical name.
    ''' </para>
    ''' </summary>
    ''' <returns>
    '''   a pointer to a <c>YCarbonDioxide</c> object, corresponding to
    '''   a CO2 sensor currently online, or a <c>Nothing</c> pointer
    '''   if there are no more CO2 sensors to enumerate.
    ''' </returns>
    '''/
    Public Function nextCarbonDioxide() As YCarbonDioxide
      Dim hwid As String = ""
      If (YISERR(_nextFunction(hwid))) Then
        Return Nothing
      End If
      If (hwid = "") Then
        Return Nothing
      End If
      Return YCarbonDioxide.FindCarbonDioxide(hwid)
    End Function

    '''*
    ''' <summary>
    '''   Starts the enumeration of CO2 sensors currently accessible.
    ''' <para>
    '''   Use the method <c>YCarbonDioxide.nextCarbonDioxide()</c> to iterate on
    '''   next CO2 sensors.
    ''' </para>
    ''' </summary>
    ''' <returns>
    '''   a pointer to a <c>YCarbonDioxide</c> object, corresponding to
    '''   the first CO2 sensor currently online, or a <c>Nothing</c> pointer
    '''   if there are none.
    ''' </returns>
    '''/
    Public Shared Function FirstCarbonDioxide() As YCarbonDioxide
      Dim v_fundescr(1) As YFUN_DESCR
      Dim dev As YDEV_DESCR
      Dim neededsize, err As Integer
      Dim serial, funcId, funcName, funcVal As String
      Dim errmsg As String = ""
      Dim size As Integer = Marshal.SizeOf(v_fundescr(0))
      Dim p As IntPtr = Marshal.AllocHGlobal(Marshal.SizeOf(v_fundescr(0)))

      err = yapiGetFunctionsByClass("CarbonDioxide", 0, p, size, neededsize, errmsg)
      Marshal.Copy(p, v_fundescr, 0, 1)
      Marshal.FreeHGlobal(p)

      If (YISERR(err) Or (neededsize = 0)) Then
        Return Nothing
      End If
      serial = ""
      funcId = ""
      funcName = ""
      funcVal = ""
      errmsg = ""
      If (YISERR(yapiGetFunctionInfo(v_fundescr(0), dev, serial, funcId, funcName, funcVal, errmsg))) Then
        Return Nothing
      End If
      Return YCarbonDioxide.FindCarbonDioxide(serial + "." + funcId)
    End Function

    REM --- (end of YCarbonDioxide public methods declaration)

  End Class

  REM --- (YCarbonDioxide functions)

  '''*
  ''' <summary>
  '''   Retrieves a CO2 sensor for a given identifier.
  ''' <para>
  '''   The identifier can be specified using several formats:
  ''' </para>
  ''' <para>
  ''' </para>
  ''' <para>
  '''   - FunctionLogicalName
  ''' </para>
  ''' <para>
  '''   - ModuleSerialNumber.FunctionIdentifier
  ''' </para>
  ''' <para>
  '''   - ModuleSerialNumber.FunctionLogicalName
  ''' </para>
  ''' <para>
  '''   - ModuleLogicalName.FunctionIdentifier
  ''' </para>
  ''' <para>
  '''   - ModuleLogicalName.FunctionLogicalName
  ''' </para>
  ''' <para>
  ''' </para>
  ''' <para>
  '''   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 <c>YCarbonDioxide.isOnline()</c> 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.
  ''' </para>
  ''' <para>
  '''   If a call to this object's is_online() method returns FALSE although
  '''   you are certain that the matching device is plugged, make sure that you did
  '''   call registerHub() at application initialization time.
  ''' </para>
  ''' <para>
  ''' </para>
  ''' </summary>
  ''' <param name="func">
  '''   a string that uniquely characterizes the CO2 sensor, for instance
  '''   <c>YCO2MK02.carbonDioxide</c>.
  ''' </param>
  ''' <returns>
  '''   a <c>YCarbonDioxide</c> object allowing you to drive the CO2 sensor.
  ''' </returns>
  '''/
  Public Function yFindCarbonDioxide(ByVal func As String) As YCarbonDioxide
    Return YCarbonDioxide.FindCarbonDioxide(func)
  End Function

  '''*
  ''' <summary>
  '''   Starts the enumeration of CO2 sensors currently accessible.
  ''' <para>
  '''   Use the method <c>YCarbonDioxide.nextCarbonDioxide()</c> to iterate on
  '''   next CO2 sensors.
  ''' </para>
  ''' </summary>
  ''' <returns>
  '''   a pointer to a <c>YCarbonDioxide</c> object, corresponding to
  '''   the first CO2 sensor currently online, or a <c>Nothing</c> pointer
  '''   if there are none.
  ''' </returns>
  '''/
  Public Function yFirstCarbonDioxide() As YCarbonDioxide
    Return YCarbonDioxide.FirstCarbonDioxide()
  End Function


  REM --- (end of YCarbonDioxide functions)

End Module
