Visual Basic .NET - Industrial Dual 0-20mA Bricklet 2.0

This is the description of the Visual Basic .NET API bindings for the Industrial Dual 0-20mA Bricklet 2.0. General information and technical specifications for the Industrial Dual 0-20mA Bricklet 2.0 are summarized in its hardware description.

An installation guide for the Visual Basic .NET API bindings is part of their general description.

Examples

The example code below is Public Domain (CC0 1.0).

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 Industrial Dual 0-20mA Bricklet 2.0

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim id020 As New BrickletIndustrialDual020mAV2(UID, ipcon) ' Create device object

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

        ' Get current current from channel 0
        Dim current As Integer = id020.GetCurrent(0)
        Console.WriteLine("Current (Channel 0): " + (current/1000000.0).ToString() + " mA")

        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 Industrial Dual 0-20mA Bricklet 2.0

    ' Callback subroutine for current callback
    Sub CurrentCB(ByVal sender As BrickletIndustrialDual020mAV2, ByVal channel As Byte, _
                  ByVal current As Integer)
        Console.WriteLine("Channel: " + channel.ToString())
        Console.WriteLine("Current: " + (current/1000000.0).ToString() + " mA")
        Console.WriteLine("")
    End Sub

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim id020 As New BrickletIndustrialDual020mAV2(UID, ipcon) ' Create device object

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

        ' Register current callback to subroutine CurrentCB
        AddHandler id020.CurrentCallback, AddressOf CurrentCB

        ' Set period for current (channel 0) callback to 1s (1000ms) without a threshold
        id020.SetCurrentCallbackConfiguration(0, 1000, False, "x"C, 0, 0)

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

Threshold

Download (ExampleThreshold.vb)

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Imports System
Imports Tinkerforge

Module ExampleThreshold
    Const HOST As String = "localhost"
    Const PORT As Integer = 4223
    Const UID As String = "XYZ" ' Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0

    ' Callback subroutine for current callback
    Sub CurrentCB(ByVal sender As BrickletIndustrialDual020mAV2, ByVal channel As Byte, _
                  ByVal current As Integer)
        Console.WriteLine("Channel: " + channel.ToString())
        Console.WriteLine("Current: " + (current/1000000.0).ToString() + " mA")
        Console.WriteLine("")
    End Sub

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim id020 As New BrickletIndustrialDual020mAV2(UID, ipcon) ' Create device object

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

        ' Register current callback to subroutine CurrentCB
        AddHandler id020.CurrentCallback, AddressOf CurrentCB

        ' Configure threshold for current (channel 0) "greater than 10 mA"
        ' with a debounce period of 10s (10000ms)
        id020.SetCurrentCallbackConfiguration(0, 10000, False, ">"C, 10*1000000, 0)

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

API

Since Visual Basic .NET does not support multiple return values directly, we use the ByRef keyword to return multiple values from a function.

All functions and procedures listed below are thread-safe.

Basic Functions

Class BrickletIndustrialDual020mAV2(ByVal uid As String, ByVal ipcon As IPConnection)

Creates an object with the unique device ID uid:

Dim industrialDual020mAV2 As New BrickletIndustrialDual020mAV2("YOUR_DEVICE_UID", ipcon)

This object can then be used after the IP Connection is connected (see examples above).

Function BrickletIndustrialDual020mAV2.GetCurrent(ByVal channel As Byte) As Integer

Returns the current of the specified channel. The value is in nA and between 0nA and 22505322nA (22.5mA).

It is possible to detect if an IEC 60381-1 compatible sensor is connected and if it works probably.

If the returned current is below 4mA, there is likely no sensor connected or the connected sensor is defective. If the returned current is over 20mA, there might be a short circuit or the sensor is defective.

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

Sub BrickletIndustrialDual020mAV2.SetChannelLEDConfig(ByVal channel As Byte, ByVal config As Byte)

Each channel has a corresponding LED. You can turn the LED off, on or show a heartbeat. You can also set the LED to "Channel Status". In this mode the LED can either be turned on with a pre-defined threshold or the intensity of the LED can change with the measured value.

You can configure the channel status behavior with SetChannelLEDStatusConfig().

By default all channel LEDs are configured as "Channel Status".

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_OFF = 0
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_ON = 1
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_SHOW_HEARTBEAT = 2
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_SHOW_CHANNEL_STATUS = 3
Function BrickletIndustrialDual020mAV2.GetChannelLEDConfig(ByVal channel As Byte) As Byte

Returns the channel LED configuration as set by SetChannelLEDConfig()

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_OFF = 0
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_ON = 1
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_SHOW_HEARTBEAT = 2
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_CONFIG_SHOW_CHANNEL_STATUS = 3
Sub BrickletIndustrialDual020mAV2.SetChannelLEDStatusConfig(ByVal channel As Byte, ByVal min As Integer, ByVal max As Integer, ByVal config As Byte)

Sets the channel LED status config. This config is used if the channel LED is configured as "Channel Status", see SetChannelLEDConfig().

For each channel you can choose between threshold and intensity mode.

In threshold mode you can define a positive or a negative threshold. For a positive threshold set the "min" parameter to the threshold value in nA above which the LED should turn on and set the "max" parameter to 0. Example: If you set a positive threshold of 10mA, the LED will turn on as soon as the current exceeds 10mA and turn off again if it goes below 10mA. For a negative threshold set the "max" parameter to the threshold value in nA below which the LED should turn on and set the "min" parameter to 0. Example: If you set a negative threshold of 10mA, the LED will turn on as soon as the current goes below 10mA and the LED will turn off when the current exceeds 10mA.

In intensity mode you can define a range in nA that is used to scale the brightness of the LED. Example with min=4mA and max=20mA: The LED is off at 4mA and below, on at 20mA and above and the brightness is linearly scaled between the values 4mA and 20mA. If the min value is greater than the max value, the LED brightness is scaled the other way around.

By default the channel LED status config is set to intensity with min=4mA and max=20mA.

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.CHANNEL_LED_STATUS_CONFIG_THRESHOLD = 0
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_STATUS_CONFIG_INTENSITY = 1
Sub BrickletIndustrialDual020mAV2.GetChannelLEDStatusConfig(ByVal channel As Byte, ByRef min As Integer, ByRef max As Integer, ByRef config As Byte)

Returns the channel LED status configuration as set by SetChannelLEDStatusConfig().

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.CHANNEL_LED_STATUS_CONFIG_THRESHOLD = 0
  • BrickletIndustrialDual020mAV2.CHANNEL_LED_STATUS_CONFIG_INTENSITY = 1

Advanced Functions

Sub BrickletIndustrialDual020mAV2.SetSampleRate(ByVal rate As Byte)

Sets the sample rate to either 240, 60, 15 or 4 samples per second. The resolution for the rates is 12, 14, 16 and 18 bit respectively.

Value Description
0 240 samples per second, 12 bit resolution
1 60 samples per second, 14 bit resolution
2 15 samples per second, 16 bit resolution
3 4 samples per second, 18 bit resolution

The default value is 3 (4 samples per second with 18 bit resolution).

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_240_SPS = 0
  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_60_SPS = 1
  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_15_SPS = 2
  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_4_SPS = 3
Function BrickletIndustrialDual020mAV2.GetSampleRate() As Byte

Returns the gain as set by SetSampleRate().

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_240_SPS = 0
  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_60_SPS = 1
  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_15_SPS = 2
  • BrickletIndustrialDual020mAV2.SAMPLE_RATE_4_SPS = 3
Sub BrickletIndustrialDual020mAV2.SetGain(ByVal gain As Byte)

Sets a gain between 1x and 8x. If you want to measure a very small current, you can increase the gain to get some more resolution.

Example: If you measure 0.5mA with a gain of 8x the return value will be 4mA.

The default gain is 1x.

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.GAIN_1X = 0
  • BrickletIndustrialDual020mAV2.GAIN_2X = 1
  • BrickletIndustrialDual020mAV2.GAIN_4X = 2
  • BrickletIndustrialDual020mAV2.GAIN_8X = 3
Function BrickletIndustrialDual020mAV2.GetGain() As Byte

Returns the gain as set by SetGain().

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.GAIN_1X = 0
  • BrickletIndustrialDual020mAV2.GAIN_2X = 1
  • BrickletIndustrialDual020mAV2.GAIN_4X = 2
  • BrickletIndustrialDual020mAV2.GAIN_8X = 3
Function BrickletIndustrialDual020mAV2.GetAPIVersion() As Byte()

Returns the version of the API definition (major, minor, revision) 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 BrickletIndustrialDual020mAV2.GetResponseExpected(ByVal functionId As Byte) As 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 send and errors are silently ignored, because they cannot be detected.

See SetResponseExpected() for the list of function ID constants available for this function.

Sub BrickletIndustrialDual020mAV2.SetResponseExpected(ByVal functionId As Byte, ByVal responseExpected As 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 send and errors are silently ignored, because they cannot be detected.

The following function ID constants are available for this function:

  • BrickletIndustrialDual020mAV2.FUNCTION_SET_CURRENT_CALLBACK_CONFIGURATION = 2
  • BrickletIndustrialDual020mAV2.FUNCTION_SET_SAMPLE_RATE = 5
  • BrickletIndustrialDual020mAV2.FUNCTION_SET_GAIN = 7
  • BrickletIndustrialDual020mAV2.FUNCTION_SET_CHANNEL_LED_CONFIG = 9
  • BrickletIndustrialDual020mAV2.FUNCTION_SET_CHANNEL_LED_STATUS_CONFIG = 11
  • BrickletIndustrialDual020mAV2.FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
  • BrickletIndustrialDual020mAV2.FUNCTION_SET_STATUS_LED_CONFIG = 239
  • BrickletIndustrialDual020mAV2.FUNCTION_RESET = 243
  • BrickletIndustrialDual020mAV2.FUNCTION_WRITE_UID = 248
Sub BrickletIndustrialDual020mAV2.SetResponseExpectedAll(ByVal responseExpected As Boolean)

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

Sub BrickletIndustrialDual020mAV2.GetSPITFPErrorCount(ByRef errorCountAckChecksum As Long, ByRef errorCountMessageChecksum As Long, ByRef errorCountFrame As Long, ByRef errorCountOverflow As Long)

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.

Function BrickletIndustrialDual020mAV2.SetBootloaderMode(ByVal mode As Byte) As Byte

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:

  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_BOOTLOADER = 0
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_FIRMWARE = 1
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
  • BrickletIndustrialDual020mAV2.BOOTLOADER_STATUS_OK = 0
  • BrickletIndustrialDual020mAV2.BOOTLOADER_STATUS_INVALID_MODE = 1
  • BrickletIndustrialDual020mAV2.BOOTLOADER_STATUS_NO_CHANGE = 2
  • BrickletIndustrialDual020mAV2.BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT = 3
  • BrickletIndustrialDual020mAV2.BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT = 4
  • BrickletIndustrialDual020mAV2.BOOTLOADER_STATUS_CRC_MISMATCH = 5
Function BrickletIndustrialDual020mAV2.GetBootloaderMode() As Byte

Returns the current bootloader mode, see SetBootloaderMode().

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_BOOTLOADER = 0
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_FIRMWARE = 1
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
  • BrickletIndustrialDual020mAV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
Sub BrickletIndustrialDual020mAV2.SetWriteFirmwarePointer(ByVal pointer As Long)

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 BrickletIndustrialDual020mAV2.WriteFirmware(ByVal data() As Byte) As Byte

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 BrickletIndustrialDual020mAV2.SetStatusLEDConfig(ByVal config As Byte)

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:

  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_OFF = 0
  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_ON = 1
  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_SHOW_STATUS = 3
Function BrickletIndustrialDual020mAV2.GetStatusLEDConfig() As Byte

Returns the configuration as set by SetStatusLEDConfig()

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_OFF = 0
  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_ON = 1
  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
  • BrickletIndustrialDual020mAV2.STATUS_LED_CONFIG_SHOW_STATUS = 3
Function BrickletIndustrialDual020mAV2.GetChipTemperature() As Short

Returns the temperature in °C 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 BrickletIndustrialDual020mAV2.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 BrickletIndustrialDual020mAV2.WriteUID(ByVal uid As Long)

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 BrickletIndustrialDual020mAV2.ReadUID() As Long

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

Sub BrickletIndustrialDual020mAV2.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)

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' or 'd'.

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

Callback Configuration Functions

Sub BrickletIndustrialDual020mAV2.SetCurrentCallbackConfiguration(ByVal channel As Byte, ByVal period As Long, ByVal valueHasToChange As Boolean, ByVal option As Char, ByVal min As Integer, ByVal max As Integer)

The period in ms is the period with which the CurrentCallback 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 CurrentCallback 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 default value is (0, false, 'x', 0, 0).

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_GREATER = ">"C
Sub BrickletIndustrialDual020mAV2.GetCurrentCallbackConfiguration(ByVal channel As Byte, ByRef period As Long, ByRef valueHasToChange As Boolean, ByRef option As Char, ByRef min As Integer, ByRef max As Integer)

Returns the callback configuration as set by SetCurrentCallbackConfiguration().

The following constants are available for this function:

  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletIndustrialDual020mAV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletIndustrialDual020mAV2.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 BrickletIndustrialDual020mAV2, ByVal value As Short)
    Console.WriteLine("Value: {0}", value)
End Sub

AddHandler industrialDual020mAV2.ExampleCallback, AddressOf MyCallback

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

Note

Using callbacks for recurring events is always preferred compared to using getters. It will use less USB bandwidth and the latency will be a lot better, since there is no round trip time.

Event BrickletIndustrialDual020mAV2.CurrentCallback(ByVal sender As BrickletIndustrialDual020mAV2, ByVal channel As Byte, ByVal current As Integer)

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

The parameter is the same as GetCurrent().

Constants

Const BrickletIndustrialDual020mAV2.DEVICE_IDENTIFIER

This constant is used to identify a Industrial Dual 0-20mA Bricklet 2.0.

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

Const BrickletIndustrialDual020mAV2.DEVICE_DISPLAY_NAME

This constant represents the human readable name of a Industrial Dual 0-20mA Bricklet 2.0.