Visual Basic .NET - CO2 Bricklet 2.0¶

Simple¶

Download (ExampleSimple.vb)

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Imports System
Imports Tinkerforge

Module ExampleSimple
    Const HOST As String = "localhost"
    Const PORT As Integer = 4223
    Const UID As String = "XYZ" ' Change XYZ to the UID of your CO2 Bricklet 2.0

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim co2 As New BrickletCO2V2(UID, ipcon) ' Create device object

        ipcon.Connect(HOST, PORT) ' Connect to brickd
        ' Don't use device before ipcon is connected

        ' Get current all values
        Dim co2Concentration, humidity As Integer
        Dim temperature As Short

        co2.GetAllValues(co2Concentration, temperature, humidity)

        Console.WriteLine("CO2 Concentration: " + co2Concentration.ToString() + " ppm")
        Console.WriteLine("Temperature: " + (temperature/100.0).ToString() + " °C")
        Console.WriteLine("Humidity: " + (humidity/100.0).ToString() + " %RH")

        Console.WriteLine("Press key to exit")
        Console.ReadLine()
        ipcon.Disconnect()
    End Sub
End Module

Callback¶

Download (ExampleCallback.vb)

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Imports System
Imports Tinkerforge

Module ExampleCallback
    Const HOST As String = "localhost"
    Const PORT As Integer = 4223
    Const UID As String = "XYZ" ' Change XYZ to the UID of your CO2 Bricklet 2.0

    ' Callback subroutine for all values callback
    Sub AllValuesCB(ByVal sender As BrickletCO2V2, ByVal co2Concentration As Integer, _
                    ByVal temperature As Short, ByVal humidity As Integer)
        Console.WriteLine("CO2 Concentration: " + co2Concentration.ToString() + " ppm")
        Console.WriteLine("Temperature: " + (temperature/100.0).ToString() + " °C")
        Console.WriteLine("Humidity: " + (humidity/100.0).ToString() + " %RH")
        Console.WriteLine("")
    End Sub

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim co2 As New BrickletCO2V2(UID, ipcon) ' Create device object

        ipcon.Connect(HOST, PORT) ' Connect to brickd
        ' Don't use device before ipcon is connected

        ' Register all values callback to subroutine AllValuesCB
        AddHandler co2.AllValuesCallback, AddressOf AllValuesCB

        ' Set period for all values callback to 1s (1000ms)
        co2.SetAllValuesCallbackConfiguration(1000, False)

        Console.WriteLine("Press key to exit")
        Console.ReadLine()
        ipcon.Disconnect()
    End Sub
End Module

Basic Functions¶

Class BrickletCO2V2(ByVal uid As String, ByVal ipcon As IPConnection)¶

Creates an object with the unique device ID uid:

Dim co2V2 As New BrickletCO2V2("YOUR_DEVICE_UID", ipcon)

This object can then be used after the IP Connection is connected.

Sub BrickletCO2V2.GetAllValues(ByRef co2Concentration As Integer, ByRef temperature As Short, ByRef humidity As Integer)¶

Output Parameters:	co2Concentration – Type: Integer, Unit: 1 ppm, Range: [0 to 40000] temperature – Type: Short, Unit: 1/100 °C, Range: [-4000 to 12000] humidity – Type: Integer, Unit: 1/100 %, Range: [0 to 10000]

Returns all values measured by the CO2 Bricklet 2.0.

If you want to get the values periodically, it is recommended to use the AllValuesCallback callback. You can set the callback configuration with SetAllValuesCallbackConfiguration().

Note

The sensor is able to messure up to 120 °C. However it is only specified up to 70 °C. Exposing the Bricklet to higher temperatures might result in permanent damage.

Sub BrickletCO2V2.SetAirPressure(ByVal airPressure As Integer)¶

Parameters:	airPressure – Type: Integer, Unit: 1 hPa, Range: [0, 700 to 1200], Default: 0

The CO2 concentration depends (among other things) on the ambient air pressure.

To increase the accuracy of the CO2 Bricklet 2.0 you can set the current air pressure. You use the Barometer Bricklet 2.0 or the Air Quality Bricklet to get the current air pressure.

By default air pressure compensation is disabled. Once you set a value it will be used for compensation. You can turn the compensation off again by setting the value to 0.

It is sufficient to update the value every few minutes.

Function BrickletCO2V2.GetAirPressure() As Integer¶

Returns:	airPressure – Type: Integer, Unit: 1 hPa, Range: [0, 700 to 1200], Default: 0

Returns the ambient air pressure as set by SetAirPressure().

Sub BrickletCO2V2.SetTemperatureOffset(ByVal offset As Integer)¶

Parameters:	offset – Type: Integer, Unit: 1/100 °C, Range: [0 to 216 - 1]

Sets a temperature offset. A offset of 10 will decrease the measured temperature by 0.1 °C.

If you install this Bricklet into an enclosure and you want to measure the ambient temperature, you may have to decrease the measured temperature by some value to compensate for the error because of the heating inside of the enclosure.

We recommend that you leave the parts in the enclosure running for at least 24 hours such that a temperature equilibrium can be reached. After that you can measure the temperature directly outside of enclosure and set the difference as offset.

This temperature offset is used to calculate the relative humidity and CO2 concentration. In case the Bricklet is installed in an enclosure, we recommend to measure and set the temperature offset to improve the accuracy of the measurements.

It is sufficient to set the temperature offset once. The offset is saved in non-volatile memory and is applied again after a power loss.

Function BrickletCO2V2.GetTemperatureOffset() As Integer¶

Returns:	offset – Type: Integer, Unit: 1/100 °C, Range: [0 to 216 - 1]

Returns the temperature offset as set by SetTemperatureOffset().

Function BrickletCO2V2.GetCO2Concentration() As Integer¶

Returns:	co2Concentration – Type: Integer, Unit: 1 ppm, Range: [0 to 40000]

Returns CO2 concentration.

If you want to get the value periodically, it is recommended to use the CO2ConcentrationCallback callback. You can set the callback configuration with SetCO2ConcentrationCallbackConfiguration().

Function BrickletCO2V2.GetTemperature() As Short¶

Returns:	temperature – Type: Short, Unit: 1/100 °C, Range: [-4000 to 12000]

Returns temperature.

Note

The sensor is able to messure up to 120 °C. However it is only specified up to 70 °C. Exposing the Bricklet to higher temperatures might result in permanent damage.

If you want to get the value periodically, it is recommended to use the TemperatureCallback callback. You can set the callback configuration with SetTemperatureCallbackConfiguration().

Function BrickletCO2V2.GetHumidity() As Integer¶

Returns:	humidity – Type: Integer, Unit: 1/100 %, Range: [0 to 10000]

Returns relative humidity.

If you want to get the value periodically, it is recommended to use the HumidityCallback callback. You can set the callback configuration with SetHumidityCallbackConfiguration().

Advanced Functions¶

Sub BrickletCO2V2.GetSPITFPErrorCount(ByRef errorCountAckChecksum As Long, ByRef errorCountMessageChecksum As Long, ByRef errorCountFrame As Long, ByRef errorCountOverflow As Long)¶

Output Parameters:	errorCountAckChecksum – Type: Long, Range: [0 to 232 - 1] errorCountMessageChecksum – Type: Long, Range: [0 to 232 - 1] errorCountFrame – Type: Long, Range: [0 to 232 - 1] errorCountOverflow – Type: Long, Range: [0 to 232 - 1]

Returns the error count for the communication between Brick and Bricklet.

The errors are divided into

• ACK checksum errors,
• message checksum errors,
• framing errors and
• overflow errors.

The errors counts are for errors that occur on the Bricklet side. All Bricks have a similar function that returns the errors on the Brick side.

Sub BrickletCO2V2.SetStatusLEDConfig(ByVal config As Byte)¶

Parameters:	config – Type: Byte, Range: See constants, Default: 3

Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets.

You can also turn the LED permanently on/off or show a heartbeat.

If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.

The following constants are available for this function:

For config:

• BrickletCO2V2.STATUS_LED_CONFIG_OFF = 0
• BrickletCO2V2.STATUS_LED_CONFIG_ON = 1
• BrickletCO2V2.STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
• BrickletCO2V2.STATUS_LED_CONFIG_SHOW_STATUS = 3

Function BrickletCO2V2.GetStatusLEDConfig() As Byte¶

Returns:	config – Type: Byte, Range: See constants, Default: 3

Returns the configuration as set by SetStatusLEDConfig()

The following constants are available for this function:

For config:

• BrickletCO2V2.STATUS_LED_CONFIG_OFF = 0
• BrickletCO2V2.STATUS_LED_CONFIG_ON = 1
• BrickletCO2V2.STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
• BrickletCO2V2.STATUS_LED_CONFIG_SHOW_STATUS = 3

Function BrickletCO2V2.GetChipTemperature() As Short¶

Returns:	temperature – Type: Short, Unit: 1 °C, Range: [-215 to 215 - 1]

Returns the temperature as measured inside the microcontroller. The value returned is not the ambient temperature!

The temperature is only proportional to the real temperature and it has bad accuracy. Practically it is only useful as an indicator for temperature changes.

Sub BrickletCO2V2.Reset()¶

Calling this function will reset the Bricklet. All configurations will be lost.

After a reset you have to create new device objects, calling functions on the existing ones will result in undefined behavior!

Sub BrickletCO2V2.GetIdentity(ByRef uid As String, ByRef connectedUid As String, ByRef position As Char, ByRef hardwareVersion() As Byte, ByRef firmwareVersion() As Byte, ByRef deviceIdentifier As Integer)¶

Output Parameters:

uid – Type: String, Length: up to 8 connectedUid – Type: String, Length: up to 8 position – Type: Char, Range: ["a"C to "h"C, "z"C] hardwareVersion – Type: Byte Array, Length: 3 0: major – Type: Byte, Range: [0 to 255] 1: minor – Type: Byte, Range: [0 to 255] 2: revision – Type: Byte, Range: [0 to 255] firmwareVersion – Type: Byte Array, Length: 3 0: major – Type: Byte, Range: [0 to 255] 1: minor – Type: Byte, Range: [0 to 255] 2: revision – Type: Byte, Range: [0 to 255] deviceIdentifier – Type: Integer, Range: [0 to 216 - 1]

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an Isolator Bricklet is always at position 'z'.

The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

Callback Configuration Functions¶

Sub BrickletCO2V2.SetAllValuesCallbackConfiguration(ByVal period As Long, ByVal valueHasToChange As Boolean)¶

Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false

The period is the period with which the AllValuesCallback callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after at least one of the values has changed. If the values didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

Sub BrickletCO2V2.GetAllValuesCallbackConfiguration(ByRef period As Long, ByRef valueHasToChange As Boolean)¶

Output Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false

Returns the callback configuration as set by SetAllValuesCallbackConfiguration().

Sub BrickletCO2V2.SetCO2ConcentrationCallbackConfiguration(ByVal period As Long, ByVal valueHasToChange As Boolean, ByVal option As Char, ByVal min As Integer, ByVal max As Integer)¶

Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false option – Type: Char, Range: See constants, Default: "x"C min – Type: Integer, Unit: 1 ppm, Range: [0 to 216 - 1], Default: 0 max – Type: Integer, Unit: 1 ppm, Range: [0 to 216 - 1], Default: 0

The period is the period with which the CO2ConcentrationCallback callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after the value has changed. If the value didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

It is furthermore possible to constrain the callback with thresholds.

The option-parameter together with min/max sets a threshold for the CO2ConcentrationCallback callback.

The following options are possible:

Option	Description
'x'	Threshold is turned off
'o'	Threshold is triggered when the value is outside the min and max values
'i'	Threshold is triggered when the value is inside or equal to the min and max values
'<'	Threshold is triggered when the value is smaller than the min value (max is ignored)
'>'	Threshold is triggered when the value is greater than the min value (max is ignored)

If the option is set to 'x' (threshold turned off) the callback is triggered with the fixed period.

The following constants are available for this function:

For option:

• BrickletCO2V2.THRESHOLD_OPTION_OFF = "x"C
• BrickletCO2V2.THRESHOLD_OPTION_OUTSIDE = "o"C
• BrickletCO2V2.THRESHOLD_OPTION_INSIDE = "i"C
• BrickletCO2V2.THRESHOLD_OPTION_SMALLER = "<"C
• BrickletCO2V2.THRESHOLD_OPTION_GREATER = ">"C

Sub BrickletCO2V2.GetCO2ConcentrationCallbackConfiguration(ByRef period As Long, ByRef valueHasToChange As Boolean, ByRef option As Char, ByRef min As Integer, ByRef max As Integer)¶

Output Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false option – Type: Char, Range: See constants, Default: "x"C min – Type: Integer, Unit: 1 ppm, Range: [0 to 216 - 1], Default: 0 max – Type: Integer, Unit: 1 ppm, Range: [0 to 216 - 1], Default: 0

Returns the callback configuration as set by SetCO2ConcentrationCallbackConfiguration().

The following constants are available for this function:

For option:

• BrickletCO2V2.THRESHOLD_OPTION_OFF = "x"C
• BrickletCO2V2.THRESHOLD_OPTION_OUTSIDE = "o"C
• BrickletCO2V2.THRESHOLD_OPTION_INSIDE = "i"C
• BrickletCO2V2.THRESHOLD_OPTION_SMALLER = "<"C
• BrickletCO2V2.THRESHOLD_OPTION_GREATER = ">"C

Sub BrickletCO2V2.SetTemperatureCallbackConfiguration(ByVal period As Long, ByVal valueHasToChange As Boolean, ByVal option As Char, ByVal min As Short, ByVal max As Short)¶

Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false option – Type: Char, Range: See constants, Default: "x"C min – Type: Short, Unit: 1/100 °C, Range: [-215 to 215 - 1], Default: 0 max – Type: Short, Unit: 1/100 °C, Range: [-215 to 215 - 1], Default: 0

The period is the period with which the TemperatureCallback callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after the value has changed. If the value didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

It is furthermore possible to constrain the callback with thresholds.

The option-parameter together with min/max sets a threshold for the TemperatureCallback callback.

The following options are possible:

Option	Description
'x'	Threshold is turned off
'o'	Threshold is triggered when the value is outside the min and max values
'i'	Threshold is triggered when the value is inside or equal to the min and max values
'<'	Threshold is triggered when the value is smaller than the min value (max is ignored)
'>'	Threshold is triggered when the value is greater than the min value (max is ignored)

If the option is set to 'x' (threshold turned off) the callback is triggered with the fixed period.

The following constants are available for this function:

For option:

• BrickletCO2V2.THRESHOLD_OPTION_OFF = "x"C
• BrickletCO2V2.THRESHOLD_OPTION_OUTSIDE = "o"C
• BrickletCO2V2.THRESHOLD_OPTION_INSIDE = "i"C
• BrickletCO2V2.THRESHOLD_OPTION_SMALLER = "<"C
• BrickletCO2V2.THRESHOLD_OPTION_GREATER = ">"C

Sub BrickletCO2V2.GetTemperatureCallbackConfiguration(ByRef period As Long, ByRef valueHasToChange As Boolean, ByRef option As Char, ByRef min As Short, ByRef max As Short)¶

Output Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false option – Type: Char, Range: See constants, Default: "x"C min – Type: Short, Unit: 1/100 °C, Range: [-215 to 215 - 1], Default: 0 max – Type: Short, Unit: 1/100 °C, Range: [-215 to 215 - 1], Default: 0

Returns the callback configuration as set by SetTemperatureCallbackConfiguration().

The following constants are available for this function:

For option:

• BrickletCO2V2.THRESHOLD_OPTION_OFF = "x"C
• BrickletCO2V2.THRESHOLD_OPTION_OUTSIDE = "o"C
• BrickletCO2V2.THRESHOLD_OPTION_INSIDE = "i"C
• BrickletCO2V2.THRESHOLD_OPTION_SMALLER = "<"C
• BrickletCO2V2.THRESHOLD_OPTION_GREATER = ">"C

Sub BrickletCO2V2.SetHumidityCallbackConfiguration(ByVal period As Long, ByVal valueHasToChange As Boolean, ByVal option As Char, ByVal min As Integer, ByVal max As Integer)¶

Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false option – Type: Char, Range: See constants, Default: "x"C min – Type: Integer, Unit: 1/100 %, Range: [0 to 216 - 1], Default: 0 max – Type: Integer, Unit: 1/100 %, Range: [0 to 216 - 1], Default: 0

The period is the period with which the HumidityCallback callback is triggered periodically. A value of 0 turns the callback off.

If the value has to change-parameter is set to true, the callback is only triggered after the value has changed. If the value didn't change within the period, the callback is triggered immediately on change.

If it is set to false, the callback is continuously triggered with the period, independent of the value.

It is furthermore possible to constrain the callback with thresholds.

The option-parameter together with min/max sets a threshold for the HumidityCallback callback.

The following options are possible:

Option	Description
'x'	Threshold is turned off
'o'	Threshold is triggered when the value is outside the min and max values
'i'	Threshold is triggered when the value is inside or equal to the min and max values
'<'	Threshold is triggered when the value is smaller than the min value (max is ignored)
'>'	Threshold is triggered when the value is greater than the min value (max is ignored)

If the option is set to 'x' (threshold turned off) the callback is triggered with the fixed period.

The following constants are available for this function:

For option:

• BrickletCO2V2.THRESHOLD_OPTION_OFF = "x"C
• BrickletCO2V2.THRESHOLD_OPTION_OUTSIDE = "o"C
• BrickletCO2V2.THRESHOLD_OPTION_INSIDE = "i"C
• BrickletCO2V2.THRESHOLD_OPTION_SMALLER = "<"C
• BrickletCO2V2.THRESHOLD_OPTION_GREATER = ">"C

Sub BrickletCO2V2.GetHumidityCallbackConfiguration(ByRef period As Long, ByRef valueHasToChange As Boolean, ByRef option As Char, ByRef min As Integer, ByRef max As Integer)¶

Output Parameters:	period – Type: Long, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 valueHasToChange – Type: Boolean, Default: false option – Type: Char, Range: See constants, Default: "x"C min – Type: Integer, Unit: 1/100 %, Range: [0 to 216 - 1], Default: 0 max – Type: Integer, Unit: 1/100 %, Range: [0 to 216 - 1], Default: 0

Returns the callback configuration as set by SetHumidityCallbackConfiguration().

The following constants are available for this function:

For option:

• BrickletCO2V2.THRESHOLD_OPTION_OFF = "x"C
• BrickletCO2V2.THRESHOLD_OPTION_OUTSIDE = "o"C
• BrickletCO2V2.THRESHOLD_OPTION_INSIDE = "i"C
• BrickletCO2V2.THRESHOLD_OPTION_SMALLER = "<"C
• BrickletCO2V2.THRESHOLD_OPTION_GREATER = ">"C

Callbacks¶

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done by assigning a procedure to an callback property of the device object:

Sub MyCallback(ByVal sender As BrickletCO2V2, ByVal value As Short)
    Console.WriteLine("Value: {0}", value)
End Sub

AddHandler co2V2.ExampleCallback, AddressOf MyCallback

The available callback property and their type of parameters are described below.

Event BrickletCO2V2.AllValuesCallback(ByVal sender As BrickletCO2V2, ByVal co2Concentration As Integer, ByVal temperature As Short, ByVal humidity As Integer)¶

Callback Parameters:	sender – Type: BrickletCO2V2 co2Concentration – Type: Integer, Unit: 1 ppm, Range: [0 to 40000] temperature – Type: Short, Unit: 1/100 °C, Range: [-4000 to 12000] humidity – Type: Integer, Unit: 1/100 %, Range: [0 to 10000]

This callback is triggered periodically according to the configuration set by SetAllValuesCallbackConfiguration().

The parameters are the same as GetAllValues().

Note

The sensor is able to messure up to 120 °C. However it is only specified up to 70 °C. Exposing the Bricklet to higher temperatures might result in permanent damage.

Event BrickletCO2V2.CO2ConcentrationCallback(ByVal sender As BrickletCO2V2, ByVal co2Concentration As Integer)¶

Callback Parameters:	sender – Type: BrickletCO2V2 co2Concentration – Type: Integer, Unit: 1 ppm, Range: [0 to 40000]

This callback is triggered periodically according to the configuration set by SetCO2ConcentrationCallbackConfiguration().

The parameter is the same as GetCO2Concentration().

Event BrickletCO2V2.TemperatureCallback(ByVal sender As BrickletCO2V2, ByVal temperature As Short)¶

Callback Parameters:	sender – Type: BrickletCO2V2 temperature – Type: Short, Unit: 1/100 °C, Range: [-4000 to 12000]

This callback is triggered periodically according to the configuration set by SetTemperatureCallbackConfiguration().

The parameter is the same as GetTemperature().

Event BrickletCO2V2.HumidityCallback(ByVal sender As BrickletCO2V2, ByVal humidity As Integer)¶

Callback Parameters:	sender – Type: BrickletCO2V2 humidity – Type: Integer, Unit: 1/100 %, Range: [0 to 10000]

This callback is triggered periodically according to the configuration set by SetHumidityCallbackConfiguration().

The parameter is the same as GetHumidity().

Virtual Functions¶

Virtual functions don't communicate with the device itself, but operate only on the API bindings device object. They can be called without the corresponding IP Connection object being connected.

Function BrickletCO2V2.GetAPIVersion() As Byte()¶

Output Parameters:	apiVersion – Type: Byte Array, Length: 3 0: major – Type: Byte, Range: [0 to 255] 1: minor – Type: Byte, Range: [0 to 255] 2: revision – Type: Byte, Range: [0 to 255]

Returns the version of the API definition implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

Function BrickletCO2V2.GetResponseExpected(ByVal functionId As Byte) As Boolean¶

Parameters:	functionId – Type: Byte, Range: See constants
Returns:	responseExpected – Type: Boolean

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by SetResponseExpected(). For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• BrickletCO2V2.FUNCTION_SET_AIR_PRESSURE = 2
• BrickletCO2V2.FUNCTION_SET_TEMPERATURE_OFFSET = 4
• BrickletCO2V2.FUNCTION_SET_ALL_VALUES_CALLBACK_CONFIGURATION = 6
• BrickletCO2V2.FUNCTION_SET_CO2_CONCENTRATION_CALLBACK_CONFIGURATION = 10
• BrickletCO2V2.FUNCTION_SET_TEMPERATURE_CALLBACK_CONFIGURATION = 14
• BrickletCO2V2.FUNCTION_SET_HUMIDITY_CALLBACK_CONFIGURATION = 18
• BrickletCO2V2.FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
• BrickletCO2V2.FUNCTION_SET_STATUS_LED_CONFIG = 239
• BrickletCO2V2.FUNCTION_RESET = 243
• BrickletCO2V2.FUNCTION_WRITE_UID = 248

Sub BrickletCO2V2.SetResponseExpected(ByVal functionId As Byte, ByVal responseExpected As Boolean)¶

Parameters:	functionId – Type: Byte, Range: See constants responseExpected – Type: Boolean

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• BrickletCO2V2.FUNCTION_SET_AIR_PRESSURE = 2
• BrickletCO2V2.FUNCTION_SET_TEMPERATURE_OFFSET = 4
• BrickletCO2V2.FUNCTION_SET_ALL_VALUES_CALLBACK_CONFIGURATION = 6
• BrickletCO2V2.FUNCTION_SET_CO2_CONCENTRATION_CALLBACK_CONFIGURATION = 10
• BrickletCO2V2.FUNCTION_SET_TEMPERATURE_CALLBACK_CONFIGURATION = 14
• BrickletCO2V2.FUNCTION_SET_HUMIDITY_CALLBACK_CONFIGURATION = 18
• BrickletCO2V2.FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
• BrickletCO2V2.FUNCTION_SET_STATUS_LED_CONFIG = 239
• BrickletCO2V2.FUNCTION_RESET = 243
• BrickletCO2V2.FUNCTION_WRITE_UID = 248

Sub BrickletCO2V2.SetResponseExpectedAll(ByVal responseExpected As Boolean)¶

Parameters:	responseExpected – Type: Boolean

Changes the response expected flag for all setter and callback configuration functions of this device at once.

Internal Functions¶

Internal functions are used for maintenance tasks such as flashing a new firmware of changing the UID of a Bricklet. These task should be performed using Brick Viewer instead of using the internal functions directly.

Function BrickletCO2V2.SetBootloaderMode(ByVal mode As Byte) As Byte¶

Parameters:	mode – Type: Byte, Range: See constants
Returns:	status – Type: Byte, Range: See constants

Sets the bootloader mode and returns the status after the requested mode change was instigated.

You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

The following constants are available for this function:

For mode:

• BrickletCO2V2.BOOTLOADER_MODE_BOOTLOADER = 0
• BrickletCO2V2.BOOTLOADER_MODE_FIRMWARE = 1
• BrickletCO2V2.BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
• BrickletCO2V2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
• BrickletCO2V2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4

For status:

• BrickletCO2V2.BOOTLOADER_STATUS_OK = 0
• BrickletCO2V2.BOOTLOADER_STATUS_INVALID_MODE = 1
• BrickletCO2V2.BOOTLOADER_STATUS_NO_CHANGE = 2
• BrickletCO2V2.BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT = 3
• BrickletCO2V2.BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT = 4
• BrickletCO2V2.BOOTLOADER_STATUS_CRC_MISMATCH = 5

Function BrickletCO2V2.GetBootloaderMode() As Byte¶

Returns:	mode – Type: Byte, Range: See constants

Returns the current bootloader mode, see SetBootloaderMode().

The following constants are available for this function:

For mode:

• BrickletCO2V2.BOOTLOADER_MODE_BOOTLOADER = 0
• BrickletCO2V2.BOOTLOADER_MODE_FIRMWARE = 1
• BrickletCO2V2.BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
• BrickletCO2V2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
• BrickletCO2V2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4

Sub BrickletCO2V2.SetWriteFirmwarePointer(ByVal pointer As Long)¶

Parameters:	pointer – Type: Long, Unit: 1 B, Range: [0 to 232 - 1]

Sets the firmware pointer for WriteFirmware(). The pointer has to be increased by chunks of size 64. The data is written to flash every 4 chunks (which equals to one page of size 256).

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

Function BrickletCO2V2.WriteFirmware(ByVal data() As Byte) As Byte¶

Parameters:	data – Type: Byte Array, Length: 64, Range: [0 to 255]
Returns:	status – Type: Byte, Range: [0 to 255]

Writes 64 Bytes of firmware at the position as written by SetWriteFirmwarePointer() before. The firmware is written to flash every 4 chunks.

You can only write firmware in bootloader mode.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

Sub BrickletCO2V2.WriteUID(ByVal uid As Long)¶

Parameters:	uid – Type: Long, Range: [0 to 232 - 1]

Writes a new UID into flash. If you want to set a new UID you have to decode the Base58 encoded UID string into an integer first.

We recommend that you use Brick Viewer to change the UID.

Function BrickletCO2V2.ReadUID() As Long¶

Returns:	uid – Type: Long, Range: [0 to 232 - 1]

Returns the current UID as an integer. Encode as Base58 to get the usual string version.

Constants¶

Const BrickletCO2V2.DEVICE_IDENTIFIER¶

This constant is used to identify a CO2 Bricklet 2.0.

The GetIdentity() function and the IPConnection.EnumerateCallback callback of the IP Connection have a deviceIdentifier parameter to specify the Brick's or Bricklet's type.

Const BrickletCO2V2.DEVICE_DISPLAY_NAME¶

This constant represents the human readable name of a CO2 Bricklet 2.0.