Go - Industrial Dual 0-20mA Bricklet 2.0

This is the description of the Go 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 Go API bindings is part of their general description. Additional documentation can be found on godoc.org.

Examples

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

Simple

Download (example_simple.go)

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package main

import (
    "fmt"
    "github.com/Tinkerforge/go-api-bindings/industrial_dual_0_20ma_v2_bricklet"
    "github.com/Tinkerforge/go-api-bindings/ipconnection"
)

const ADDR string = "localhost:4223"
const UID string = "XYZ" // Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0.

func main() {
    ipcon := ipconnection.New()
    defer ipcon.Close()
    id020, _ := industrial_dual_0_20ma_v2_bricklet.New(UID, &ipcon) // Create device object.

    ipcon.Connect(ADDR) // Connect to brickd.
    defer ipcon.Disconnect()
    // Don't use device before ipcon is connected.

    // Get current current from channel 0.
    current, _ := id020.GetCurrent(0)
    fmt.Printf("Current (Channel 0): %f mA\n", float64(current)/1000000.0)

    fmt.Print("Press enter to exit.")
    fmt.Scanln()
}

Callback

Download (example_callback.go)

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package main

import (
    "fmt"
    "github.com/Tinkerforge/go-api-bindings/industrial_dual_0_20ma_v2_bricklet"
    "github.com/Tinkerforge/go-api-bindings/ipconnection"
)

const ADDR string = "localhost:4223"
const UID string = "XYZ" // Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0.

func main() {
    ipcon := ipconnection.New()
    defer ipcon.Close()
    id020, _ := industrial_dual_0_20ma_v2_bricklet.New(UID, &ipcon) // Create device object.

    ipcon.Connect(ADDR) // Connect to brickd.
    defer ipcon.Disconnect()
    // Don't use device before ipcon is connected.

    id020.RegisterCurrentCallback(func(channel uint8, current int32) {
        fmt.Printf("Channel: %d\n", channel)
        fmt.Printf("Current: %f mA\n", float64(current)/1000000.0)
        fmt.Println()
    })

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

    fmt.Print("Press enter to exit.")
    fmt.Scanln()
}

Threshold

Download (example_threshold.go)

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package main

import (
    "fmt"
    "github.com/Tinkerforge/go-api-bindings/industrial_dual_0_20ma_v2_bricklet"
    "github.com/Tinkerforge/go-api-bindings/ipconnection"
)

const ADDR string = "localhost:4223"
const UID string = "XYZ" // Change XYZ to the UID of your Industrial Dual 0-20mA Bricklet 2.0.

func main() {
    ipcon := ipconnection.New()
    defer ipcon.Close()
    id020, _ := industrial_dual_0_20ma_v2_bricklet.New(UID, &ipcon) // Create device object.

    ipcon.Connect(ADDR) // Connect to brickd.
    defer ipcon.Disconnect()
    // Don't use device before ipcon is connected.

    id020.RegisterCurrentCallback(func(channel uint8, current int32) {
        fmt.Printf("Channel: %d\n", channel)
        fmt.Printf("Current: %f mA\n", float64(current)/1000000.0)
        fmt.Println()
    })

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

    fmt.Print("Press enter to exit.")
    fmt.Scanln()
}

API

The Industrial Dual 0-20mA Bricklet 2.0 API is defined in the package github.com/Tinkerforge/go-api-bindings/industrial_dual_0_20ma_v2_bricklet

Nearly every function of the Go bindings can return an ipconnection.DeviceError, implementing the error interface. The error can have one of the following values:

  • ipconnection.DeviceErrorSuccess = 0
  • ipconnection.DeviceErrorInvalidParameter = 1
  • ipconnection.DeviceErrorFunctionNotSupported = 2
  • ipconnection.DeviceErrorUnknownError = 3

which correspond to the values returned from Bricks and Bricklets.

All functions listed below are thread-safe.

Basic Functions

func industrial_dual_0_20ma_v2_bricklet.New(uid string, ipcon *IPConnection) (device IndustrialDual020mAV2Bricklet, err error)
Parameters:
  • uid – Type: string
  • ipcon – Type: *IPConnection
Returns:
  • device – Type: IndustrialDual020mAV2Bricklet
  • err – Type: error

Creates a new IndustrialDual020mAV2Bricklet object with the unique device ID uid and adds it to the IPConnection ipcon:

device, err := industrial_dual_0_20ma_v2_bricklet.New("YOUR_DEVICE_UID", &ipcon)

This device object can be used after the IPConnection has been connected (see examples above).

func (*IndustrialDual020mAV2Bricklet) GetCurrent(channel uint8) (current int32, err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
Returns:
  • current – Type: int32, Unit: 1 nA, Range: [0 to 22505322]
  • err – Type: error

Returns the current of the specified channel.

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 RegisterCurrentCallback callback. You can set the callback configuration with SetCurrentCallbackConfiguration().

func (*IndustrialDual020mAV2Bricklet) SetChannelLEDConfig(channel uint8, config uint8) (err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
  • config – Type: uint8, Range: See constants, Default: 3
Returns:
  • err – Type: error

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().

The following constants are available for this function:

For config:

  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigOff = 0
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigOn = 1
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigShowHeartbeat = 2
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigShowChannelStatus = 3
func (*IndustrialDual020mAV2Bricklet) GetChannelLEDConfig(channel uint8) (config uint8, err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
Returns:
  • config – Type: uint8, Range: See constants, Default: 3
  • err – Type: error

Returns the channel LED configuration as set by SetChannelLEDConfig()

The following constants are available for this function:

For config:

  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigOff = 0
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigOn = 1
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigShowHeartbeat = 2
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDConfigShowChannelStatus = 3
func (*IndustrialDual020mAV2Bricklet) SetChannelLEDStatusConfig(channel uint8, min int32, max int32, config uint8) (err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
  • min – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 4000000
  • max – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 20000000
  • config – Type: uint8, Range: See constants, Default: 1
Returns:
  • err – Type: error

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.

The following constants are available for this function:

For config:

  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDStatusConfigThreshold = 0
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDStatusConfigIntensity = 1
func (*IndustrialDual020mAV2Bricklet) GetChannelLEDStatusConfig(channel uint8) (min int32, max int32, config uint8, err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
Returns:
  • min – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 4000000
  • max – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 20000000
  • config – Type: uint8, Range: See constants, Default: 1
  • err – Type: error

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

The following constants are available for this function:

For config:

  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDStatusConfigThreshold = 0
  • industrial_dual_0_20ma_v2_bricklet.ChannelLEDStatusConfigIntensity = 1

Advanced Functions

func (*IndustrialDual020mAV2Bricklet) SetSampleRate(rate uint8) (err error)
Parameters:
  • rate – Type: uint8, Range: See constants, Default: 3
Returns:
  • err – Type: error

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 following constants are available for this function:

For rate:

  • industrial_dual_0_20ma_v2_bricklet.SampleRate240SPS = 0
  • industrial_dual_0_20ma_v2_bricklet.SampleRate60SPS = 1
  • industrial_dual_0_20ma_v2_bricklet.SampleRate15SPS = 2
  • industrial_dual_0_20ma_v2_bricklet.SampleRate4SPS = 3
func (*IndustrialDual020mAV2Bricklet) GetSampleRate() (rate uint8, err error)
Returns:
  • rate – Type: uint8, Range: See constants, Default: 3
  • err – Type: error

Returns the gain as set by SetSampleRate().

The following constants are available for this function:

For rate:

  • industrial_dual_0_20ma_v2_bricklet.SampleRate240SPS = 0
  • industrial_dual_0_20ma_v2_bricklet.SampleRate60SPS = 1
  • industrial_dual_0_20ma_v2_bricklet.SampleRate15SPS = 2
  • industrial_dual_0_20ma_v2_bricklet.SampleRate4SPS = 3
func (*IndustrialDual020mAV2Bricklet) SetGain(gain uint8) (err error)
Parameters:
  • gain – Type: uint8, Range: See constants, Default: 0
Returns:
  • err – Type: error

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 following constants are available for this function:

For gain:

  • industrial_dual_0_20ma_v2_bricklet.Gain1x = 0
  • industrial_dual_0_20ma_v2_bricklet.Gain2x = 1
  • industrial_dual_0_20ma_v2_bricklet.Gain4x = 2
  • industrial_dual_0_20ma_v2_bricklet.Gain8x = 3
func (*IndustrialDual020mAV2Bricklet) GetGain() (gain uint8, err error)
Returns:
  • gain – Type: uint8, Range: See constants, Default: 0
  • err – Type: error

Returns the gain as set by SetGain().

The following constants are available for this function:

For gain:

  • industrial_dual_0_20ma_v2_bricklet.Gain1x = 0
  • industrial_dual_0_20ma_v2_bricklet.Gain2x = 1
  • industrial_dual_0_20ma_v2_bricklet.Gain4x = 2
  • industrial_dual_0_20ma_v2_bricklet.Gain8x = 3
func (*IndustrialDual020mAV2Bricklet) GetSPITFPErrorCount() (errorCountAckChecksum uint32, errorCountMessageChecksum uint32, errorCountFrame uint32, errorCountOverflow uint32, err error)
Returns:
  • errorCountAckChecksum – Type: uint32, Range: [0 to 232 - 1]
  • errorCountMessageChecksum – Type: uint32, Range: [0 to 232 - 1]
  • errorCountFrame – Type: uint32, Range: [0 to 232 - 1]
  • errorCountOverflow – Type: uint32, Range: [0 to 232 - 1]
  • err – Type: error

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.

func (*IndustrialDual020mAV2Bricklet) SetBootloaderMode(mode uint8) (status uint8, err error)
Parameters:
  • mode – Type: uint8, Range: See constants
Returns:
  • status – Type: uint8, Range: See constants
  • err – Type: error

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:

  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeBootloader = 0
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeFirmware = 1
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeBootloaderWaitForReboot = 2
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeFirmwareWaitForReboot = 3
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeFirmwareWaitForEraseAndReboot = 4

For status:

  • industrial_dual_0_20ma_v2_bricklet.BootloaderStatusOK = 0
  • industrial_dual_0_20ma_v2_bricklet.BootloaderStatusInvalidMode = 1
  • industrial_dual_0_20ma_v2_bricklet.BootloaderStatusNoChange = 2
  • industrial_dual_0_20ma_v2_bricklet.BootloaderStatusEntryFunctionNotPresent = 3
  • industrial_dual_0_20ma_v2_bricklet.BootloaderStatusDeviceIdentifierIncorrect = 4
  • industrial_dual_0_20ma_v2_bricklet.BootloaderStatusCRCMismatch = 5
func (*IndustrialDual020mAV2Bricklet) GetBootloaderMode() (mode uint8, err error)
Returns:
  • mode – Type: uint8, Range: See constants
  • err – Type: error

Returns the current bootloader mode, see SetBootloaderMode().

The following constants are available for this function:

For mode:

  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeBootloader = 0
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeFirmware = 1
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeBootloaderWaitForReboot = 2
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeFirmwareWaitForReboot = 3
  • industrial_dual_0_20ma_v2_bricklet.BootloaderModeFirmwareWaitForEraseAndReboot = 4
func (*IndustrialDual020mAV2Bricklet) SetWriteFirmwarePointer(pointer uint32) (err error)
Parameters:
  • pointer – Type: uint32, Unit: 1 B, Range: [0 to 232 - 1]
Returns:
  • err – Type: error

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.

func (*IndustrialDual020mAV2Bricklet) WriteFirmware(data [64]uint8) (status uint8, err error)
Parameters:
  • data – Type: [64]uint8, Range: [0 to 255]
Returns:
  • status – Type: uint8, Range: [0 to 255]
  • err – Type: error

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.

func (*IndustrialDual020mAV2Bricklet) SetStatusLEDConfig(config uint8) (err error)
Parameters:
  • config – Type: uint8, Range: See constants, Default: 3
Returns:
  • err – Type: error

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:

  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigOff = 0
  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigOn = 1
  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigShowHeartbeat = 2
  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigShowStatus = 3
func (*IndustrialDual020mAV2Bricklet) GetStatusLEDConfig() (config uint8, err error)
Returns:
  • config – Type: uint8, Range: See constants, Default: 3
  • err – Type: error

Returns the configuration as set by SetStatusLEDConfig()

The following constants are available for this function:

For config:

  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigOff = 0
  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigOn = 1
  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigShowHeartbeat = 2
  • industrial_dual_0_20ma_v2_bricklet.StatusLEDConfigShowStatus = 3
func (*IndustrialDual020mAV2Bricklet) GetChipTemperature() (temperature int16, err error)
Returns:
  • temperature – Type: int16, Unit: 1 °C, Range: [-215 to 215 - 1]
  • err – Type: error

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.

func (*IndustrialDual020mAV2Bricklet) Reset() (err error)
Returns:
  • err – Type: error

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!

func (*IndustrialDual020mAV2Bricklet) WriteUID(uid uint32) (err error)
Parameters:
  • uid – Type: uint32, Range: [0 to 232 - 1]
Returns:
  • err – Type: error

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.

func (*IndustrialDual020mAV2Bricklet) ReadUID() (uid uint32, err error)
Returns:
  • uid – Type: uint32, Range: [0 to 232 - 1]
  • err – Type: error

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

func (*IndustrialDual020mAV2Bricklet) GetIdentity() (uid string, connectedUid string, position rune, hardwareVersion [3]uint8, firmwareVersion [3]uint8, deviceIdentifier uint16, err error)
Returns:
  • uid – Type: string, Length: up to 8
  • connectedUid – Type: string, Length: up to 8
  • position – Type: rune, Range: ['a' to 'h', 'i', 'z']
  • hardwareVersion – Type: [3]uint8
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • firmwareVersion – Type: [3]uint8
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • deviceIdentifier – Type: uint16, Range: [0 to 216 - 1]
  • err – Type: error

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). The Raspberry Pi HAT (Zero) Brick is always at position 'i' and the Bricklet connected to an Isolator Bricklet is always as 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

func (*IndustrialDual020mAV2Bricklet) SetCurrentCallbackConfiguration(channel uint8, period uint32, valueHasToChange bool, option rune, min int32, max int32) (err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
  • valueHasToChange – Type: bool, Default: false
  • option – Type: rune, Range: See constants, Default: 'x'
  • min – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 0
  • max – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 0
Returns:
  • err – Type: error

The period is the period with which the RegisterCurrentCallback 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 RegisterCurrentCallback 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:

  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionOff = 'x'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionOutside = 'o'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionInside = 'i'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionSmaller = '<'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionGreater = '>'
func (*IndustrialDual020mAV2Bricklet) GetCurrentCallbackConfiguration(channel uint8) (period uint32, valueHasToChange bool, option rune, min int32, max int32, err error)
Parameters:
  • channel – Type: uint8, Range: [0 to 1]
Returns:
  • period – Type: uint32, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
  • valueHasToChange – Type: bool, Default: false
  • option – Type: rune, Range: See constants, Default: 'x'
  • min – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 0
  • max – Type: int32, Unit: 1 nA, Range: [-231 to 231 - 1], Default: 0
  • err – Type: error

Returns the callback configuration as set by SetCurrentCallbackConfiguration().

The following constants are available for this function:

For option:

  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionOff = 'x'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionOutside = 'o'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionInside = 'i'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionSmaller = '<'
  • industrial_dual_0_20ma_v2_bricklet.ThresholdOptionGreater = '>'

Callbacks

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done with the corresponding Register*Callback function, which returns a unique callback ID. This ID can be used to deregister the callback later with the corresponding Deregister*Callback function.

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.

func (*IndustrialDual020mAV2Bricklet) RegisterCurrentCallback(func(channel uint8, current int32)) (registrationId uint64)
Callback Parameters:
  • channel – Type: uint8, Range: [0 to 1]
  • current – Type: int32, Unit: 1 nA, Range: [0 to 22505322]
Returns:
  • registrationId – Type: uint64

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

The callback parameter is the same as GetCurrent().

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.

func (*IndustrialDual020mAV2Bricklet) GetAPIVersion() (apiVersion [3]uint8, err error)
Returns:
  • apiVersion – Type: [3]uint8
    • 0: major – Type: uint8, Range: [0 to 255]
    • 1: minor – Type: uint8, Range: [0 to 255]
    • 2: revision – Type: uint8, Range: [0 to 255]
  • err – Type: error

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.

func (*IndustrialDual020mAV2Bricklet) GetResponseExpected(functionId uint8) (responseExpected bool, err error)
Parameters:
  • functionId – Type: uint8, Range: See constants
Returns:
  • responseExpected – Type: bool
  • err – Type: error

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.

The following constants are available for this function:

For functionId:

  • industrial_dual_0_20ma_v2_bricklet.FunctionSetCurrentCallbackConfiguration = 2
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetSampleRate = 5
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetGain = 7
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetChannelLEDConfig = 9
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetChannelLEDStatusConfig = 11
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetWriteFirmwarePointer = 237
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetStatusLEDConfig = 239
  • industrial_dual_0_20ma_v2_bricklet.FunctionReset = 243
  • industrial_dual_0_20ma_v2_bricklet.FunctionWriteUID = 248
func (*IndustrialDual020mAV2Bricklet) SetResponseExpected(functionId uint8, responseExpected bool) (err error)
Parameters:
  • functionId – Type: uint8, Range: See constants
  • responseExpected – Type: bool
Returns:
  • err – Type: error

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 constants are available for this function:

For functionId:

  • industrial_dual_0_20ma_v2_bricklet.FunctionSetCurrentCallbackConfiguration = 2
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetSampleRate = 5
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetGain = 7
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetChannelLEDConfig = 9
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetChannelLEDStatusConfig = 11
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetWriteFirmwarePointer = 237
  • industrial_dual_0_20ma_v2_bricklet.FunctionSetStatusLEDConfig = 239
  • industrial_dual_0_20ma_v2_bricklet.FunctionReset = 243
  • industrial_dual_0_20ma_v2_bricklet.FunctionWriteUID = 248
func (*IndustrialDual020mAV2Bricklet) SetResponseExpectedAll(responseExpected bool) (err error)
Parameters:
  • responseExpected – Type: bool
Returns:
  • err – Type: error

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

Constants

industrial_dual_0_20ma_v2_bricklet.DeviceIdentifier

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

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

industrial_dual_0_20ma_v2_bricklet.DeviceDisplayName

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