Visual Basic .NET - Voltage/Current Bricklet 2.0

This is the description of the Visual Basic .NET API bindings for the Voltage/Current Bricklet 2.0. General information and technical specifications for the Voltage/Current 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)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
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 Voltage/Current Bricklet 2.0

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim vc As New BrickletVoltageCurrentV2(UID, ipcon) ' Create device object

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

        ' Get current voltage
        Dim voltage As Integer = vc.GetVoltage()
        Console.WriteLine("Voltage: " + (voltage/1000.0).ToString() + " V")

        ' Get current current
        Dim current As Integer = vc.GetCurrent()
        Console.WriteLine("Current: " + (current/1000.0).ToString() + " A")

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

Callback

Download (ExampleCallback.vb)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
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 Voltage/Current Bricklet 2.0

    ' Callback subroutine for current callback
    Sub CurrentCB(ByVal sender As BrickletVoltageCurrentV2, ByVal current As Integer)
        Console.WriteLine("Current: " + (current/1000.0).ToString() + " A")
    End Sub

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim vc As New BrickletVoltageCurrentV2(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 vc.CurrentCallback, AddressOf CurrentCB

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

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

Threshold

Download (ExampleThreshold.vb)

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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 Voltage/Current Bricklet 2.0

    ' Callback subroutine for power callback
    Sub PowerCB(ByVal sender As BrickletVoltageCurrentV2, ByVal power As Integer)
        Console.WriteLine("power: " + (power/1000.0).ToString() + " W")
    End Sub

    Sub Main()
        Dim ipcon As New IPConnection() ' Create IP connection
        Dim vc As New BrickletVoltageCurrentV2(UID, ipcon) ' Create device object

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

        ' Register power callback to subroutine PowerCB
        AddHandler vc.PowerCallback, AddressOf PowerCB

        ' Configure threshold for power "greater than 10 W"
        ' with a debounce period of 1s (1000ms)
        vc.SetPowerCallbackConfiguration(1000, False, ">"C, 10*1000, 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 BrickletVoltageCurrentV2(ByVal uid As String, ByVal ipcon As IPConnection)

Creates an object with the unique device ID uid:

Dim voltageCurrentV2 As New BrickletVoltageCurrentV2("YOUR_DEVICE_UID", ipcon)

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

Function BrickletVoltageCurrentV2.GetCurrent() As Integer

Returns the current. The value is in mA and between -20000mA and 20000mA.

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

Function BrickletVoltageCurrentV2.GetVoltage() As Integer

Returns the voltage. The value is in mV and between 0mV and 36000mV.

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

Function BrickletVoltageCurrentV2.GetPower() As Integer

Returns the power. The value is in mW and between 0mV and 720000mW.

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

Sub BrickletVoltageCurrentV2.SetConfiguration(ByVal averaging As Byte, ByVal voltageConversionTime As Byte, ByVal currentConversionTime As Byte)

Sets the configuration of the Voltage/Current Bricklet 2.0. It is possible to configure number of averages as well as voltage and current conversion time.

Averaging:

Value Number of Averages
0 1
1 4
2 16
3 64
4 128
5 256
6 512
>=7 1024

Voltage/Current conversion:

Value Conversion time
0 140µs
1 204µs
2 332µs
3 588µs
4 1.1ms
5 2.116ms
6 4.156ms
>=7 8.244ms

The default values are 3, 4 and 4 (64, 1.1ms, 1.1ms) for averaging, voltage conversion and current conversion.

The following constants are available for this function:

  • BrickletVoltageCurrentV2.AVERAGING_1 = 0
  • BrickletVoltageCurrentV2.AVERAGING_4 = 1
  • BrickletVoltageCurrentV2.AVERAGING_16 = 2
  • BrickletVoltageCurrentV2.AVERAGING_64 = 3
  • BrickletVoltageCurrentV2.AVERAGING_128 = 4
  • BrickletVoltageCurrentV2.AVERAGING_256 = 5
  • BrickletVoltageCurrentV2.AVERAGING_512 = 6
  • BrickletVoltageCurrentV2.AVERAGING_1024 = 7
Sub BrickletVoltageCurrentV2.GetConfiguration(ByRef averaging As Byte, ByRef voltageConversionTime As Byte, ByRef currentConversionTime As Byte)

Returns the configuration as set by SetConfiguration().

The following constants are available for this function:

  • BrickletVoltageCurrentV2.AVERAGING_1 = 0
  • BrickletVoltageCurrentV2.AVERAGING_4 = 1
  • BrickletVoltageCurrentV2.AVERAGING_16 = 2
  • BrickletVoltageCurrentV2.AVERAGING_64 = 3
  • BrickletVoltageCurrentV2.AVERAGING_128 = 4
  • BrickletVoltageCurrentV2.AVERAGING_256 = 5
  • BrickletVoltageCurrentV2.AVERAGING_512 = 6
  • BrickletVoltageCurrentV2.AVERAGING_1024 = 7

Advanced Functions

Sub BrickletVoltageCurrentV2.SetCalibration(ByVal voltageMultiplier As Integer, ByVal voltageDivisor As Integer, ByVal currentMultiplier As Integer, ByVal currentDivisor As Integer)

Since the ADC and the shunt resistor used for the measurements are not perfect they need to be calibrated by a multiplier and a divisor if a very precise reading is needed.

For example, if you are expecting a current of 1000mA and you are measuring 1023mA, you can calibrate the Voltage/Current Bricklet by setting the current multiplier to 1000 and the divisor to 1023. The same applies for the voltage.

Sub BrickletVoltageCurrentV2.GetCalibration(ByRef voltageMultiplier As Integer, ByRef voltageDivisor As Integer, ByRef currentMultiplier As Integer, ByRef currentDivisor As Integer)

Returns the calibration as set by SetCalibration().

Function BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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:

  • BrickletVoltageCurrentV2.FUNCTION_SET_CURRENT_CALLBACK_CONFIGURATION = 2
  • BrickletVoltageCurrentV2.FUNCTION_SET_VOLTAGE_CALLBACK_CONFIGURATION = 6
  • BrickletVoltageCurrentV2.FUNCTION_SET_POWER_CALLBACK_CONFIGURATION = 10
  • BrickletVoltageCurrentV2.FUNCTION_SET_CONFIGURATION = 13
  • BrickletVoltageCurrentV2.FUNCTION_SET_CALIBRATION = 15
  • BrickletVoltageCurrentV2.FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
  • BrickletVoltageCurrentV2.FUNCTION_SET_STATUS_LED_CONFIG = 239
  • BrickletVoltageCurrentV2.FUNCTION_RESET = 243
  • BrickletVoltageCurrentV2.FUNCTION_WRITE_UID = 248
Sub BrickletVoltageCurrentV2.SetResponseExpectedAll(ByVal responseExpected As Boolean)

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

Sub BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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:

  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_BOOTLOADER = 0
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_FIRMWARE = 1
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
  • BrickletVoltageCurrentV2.BOOTLOADER_STATUS_OK = 0
  • BrickletVoltageCurrentV2.BOOTLOADER_STATUS_INVALID_MODE = 1
  • BrickletVoltageCurrentV2.BOOTLOADER_STATUS_NO_CHANGE = 2
  • BrickletVoltageCurrentV2.BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT = 3
  • BrickletVoltageCurrentV2.BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT = 4
  • BrickletVoltageCurrentV2.BOOTLOADER_STATUS_CRC_MISMATCH = 5
Function BrickletVoltageCurrentV2.GetBootloaderMode() As Byte

Returns the current bootloader mode, see SetBootloaderMode().

The following constants are available for this function:

  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_BOOTLOADER = 0
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_FIRMWARE = 1
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
  • BrickletVoltageCurrentV2.BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
Sub BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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:

  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_OFF = 0
  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_ON = 1
  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_SHOW_STATUS = 3
Function BrickletVoltageCurrentV2.GetStatusLEDConfig() As Byte

Returns the configuration as set by SetStatusLEDConfig()

The following constants are available for this function:

  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_OFF = 0
  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_ON = 1
  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
  • BrickletVoltageCurrentV2.STATUS_LED_CONFIG_SHOW_STATUS = 3
Function BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.ReadUID() As Long

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

Sub BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2.SetCurrentCallbackConfiguration(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:

  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_GREATER = ">"C
Sub BrickletVoltageCurrentV2.GetCurrentCallbackConfiguration(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:

  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_GREATER = ">"C
Sub BrickletVoltageCurrentV2.SetVoltageCallbackConfiguration(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 VoltageCallback 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 VoltageCallback 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:

  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_GREATER = ">"C
Sub BrickletVoltageCurrentV2.GetVoltageCallbackConfiguration(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 SetVoltageCallbackConfiguration().

The following constants are available for this function:

  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_GREATER = ">"C
Sub BrickletVoltageCurrentV2.SetPowerCallbackConfiguration(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 PowerCallback 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 PowerCallback 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:

  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_GREATER = ">"C
Sub BrickletVoltageCurrentV2.GetPowerCallbackConfiguration(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 SetPowerCallbackConfiguration().

The following constants are available for this function:

  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OFF = "x"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_OUTSIDE = "o"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_INSIDE = "i"C
  • BrickletVoltageCurrentV2.THRESHOLD_OPTION_SMALLER = "<"C
  • BrickletVoltageCurrentV2.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 BrickletVoltageCurrentV2, ByVal value As Short)
    Console.WriteLine("Value: {0}", value)
End Sub

AddHandler voltageCurrentV2.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 BrickletVoltageCurrentV2.CurrentCallback(ByVal sender As BrickletVoltageCurrentV2, ByVal current As Integer)

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

The parameter is the same as GetCurrent().

Event BrickletVoltageCurrentV2.VoltageCallback(ByVal sender As BrickletVoltageCurrentV2, ByVal voltage As Integer)

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

The parameter is the same as GetVoltage().

Event BrickletVoltageCurrentV2.PowerCallback(ByVal sender As BrickletVoltageCurrentV2, ByVal power As Integer)

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

The parameter is the same as GetPower().

Constants

Const BrickletVoltageCurrentV2.DEVICE_IDENTIFIER

This constant is used to identify a Voltage/Current 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 BrickletVoltageCurrentV2.DEVICE_DISPLAY_NAME

This constant represents the human readable name of a Voltage/Current Bricklet 2.0.