Shell - Voltage/Current Bricklet 2.0¶

Simple¶

Download (example-simple.sh)

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#!/bin/sh
# Connects to localhost:4223 by default, use --host and --port to change this

uid=XYZ # Change XYZ to the UID of your Voltage/Current Bricklet 2.0

# Get current voltage
tinkerforge call voltage-current-v2-bricklet $uid get-voltage

# Get current current
tinkerforge call voltage-current-v2-bricklet $uid get-current

Callback¶

Download (example-callback.sh)

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#!/bin/sh
# Connects to localhost:4223 by default, use --host and --port to change this

uid=XYZ # Change XYZ to the UID of your Voltage/Current Bricklet 2.0

# Handle incoming current callbacks
tinkerforge dispatch voltage-current-v2-bricklet $uid current &

# Set period for current callback to 1s (1000ms) without a threshold
tinkerforge call voltage-current-v2-bricklet $uid set-current-callback-configuration 1000 false threshold-option-off 0 0

echo "Press key to exit"; read dummy

kill -- -$$ # Stop callback dispatch in background

Threshold¶

Download (example-threshold.sh)

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#!/bin/sh
# Connects to localhost:4223 by default, use --host and --port to change this

uid=XYZ # Change XYZ to the UID of your Voltage/Current Bricklet 2.0

# Handle incoming power callbacks
tinkerforge dispatch voltage-current-v2-bricklet $uid power &

# Configure threshold for power "greater than 10 W"
# with a debounce period of 1s (1000ms)
tinkerforge call voltage-current-v2-bricklet $uid set-power-callback-configuration 1000 false threshold-option-greater 10000 0

echo "Press key to exit"; read dummy

kill -- -$$ # Stop callback dispatch in background

Command Structure¶

The common options of the call and dispatch commands are documented here. The specific command structure is shown below.

tinkerforge call voltage-current-v2-bricklet [<option>..] <uid> <function> [<argument>..]¶

Parameters:	<uid> – Type: String <function> – Type: String

The call command is used to call a function of the Voltage/Current Bricklet 2.0. It can take several options:

• --help shows help for the specific call command and exits
• --list-functions shows a list of known functions of the Voltage/Current Bricklet 2.0 and exits

tinkerforge dispatch voltage-current-v2-bricklet [<option>..] <uid> <callback>¶

Parameters:	<uid> – Type: String <callback> – Type: String

The dispatch command is used to dispatch a callback of the Voltage/Current Bricklet 2.0. It can take several options:

• --help shows help for the specific dispatch command and exits
• --list-callbacks shows a list of known callbacks of the Voltage/Current Bricklet 2.0 and exits

tinkerforge call voltage-current-v2-bricklet <uid> <function> [<option>..] [<argument>..]¶

Parameters:	<uid> – Type: String <function> – Type: String

The <function> to be called can take different options depending of its kind. All functions can take the following options:

• --help shows help for the specific function and exits

Getter functions can take the following options:

• --execute <command> shell command line to execute for each incoming response (see section about output formatting for details)

Setter functions can take the following options:

• --expect-response requests response and waits for it

The --expect-response option for setter functions allows to detect timeouts and other error conditions calls of setters as well. The device will then send a response for this purpose. If this option is not given for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

tinkerforge dispatch voltage-current-v2-bricklet <uid> <callback> [<option>..]¶

Parameters:	<uid> – Type: String <callback> – Type: String

The <callback> to be dispatched can take several options:

• --help shows help for the specific callback and exits
• --execute <command> shell command line to execute for each incoming response (see section about output formatting for details)

Basic Functions¶

tinkerforge call voltage-current-v2-bricklet <uid> get-current¶

Output:	current – Type: Int, Unit: 1 mA, Range: [-20000 to 20000]

Returns the current.

If you want to get the value periodically, it is recommended to use the current callback. You can set the callback configuration with set-current-callback-configuration.

tinkerforge call voltage-current-v2-bricklet <uid> get-voltage¶

Output:	voltage – Type: Int, Unit: 1 mV, Range: [0 to 36000]

Returns the voltage.

If you want to get the value periodically, it is recommended to use the voltage callback. You can set the callback configuration with set-voltage-callback-configuration.

tinkerforge call voltage-current-v2-bricklet <uid> get-power¶

Output:	power – Type: Int, Unit: 1 mW, Range: [0 to 720000]

Returns the power.

If you want to get the value periodically, it is recommended to use the power callback. You can set the callback configuration with set-power-callback-configuration.

tinkerforge call voltage-current-v2-bricklet <uid> set-configuration <averaging> <voltage-conversion-time> <current-conversion-time>¶

Parameters:	<averaging> – Type: Int, Range: See symbols, Default: 3 <voltage-conversion-time> – Type: Int, Range: See symbols, Default: 4 <current-conversion-time> – Type: Int, Range: See symbols, Default: 4
Output:	no output

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.

The following symbols are available for this function:

For <averaging>:

• averaging-1 = 0
• averaging-4 = 1
• averaging-16 = 2
• averaging-64 = 3
• averaging-128 = 4
• averaging-256 = 5
• averaging-512 = 6
• averaging-1024 = 7

For <voltage-conversion-time>:

• conversion-time-140us = 0
• conversion-time-204us = 1
• conversion-time-332us = 2
• conversion-time-588us = 3
• conversion-time-1-1ms = 4
• conversion-time-2-116ms = 5
• conversion-time-4-156ms = 6
• conversion-time-8-244ms = 7

For <current-conversion-time>:

• conversion-time-140us = 0
• conversion-time-204us = 1
• conversion-time-332us = 2
• conversion-time-588us = 3
• conversion-time-1-1ms = 4
• conversion-time-2-116ms = 5
• conversion-time-4-156ms = 6
• conversion-time-8-244ms = 7

tinkerforge call voltage-current-v2-bricklet <uid> get-configuration¶

Output:	averaging – Type: Int, Range: See symbols, Default: 3 voltage-conversion-time – Type: Int, Range: See symbols, Default: 4 current-conversion-time – Type: Int, Range: See symbols, Default: 4

Returns the configuration as set by set-configuration.

The following symbols are available for this function:

For averaging:

• averaging-1 = 0
• averaging-4 = 1
• averaging-16 = 2
• averaging-64 = 3
• averaging-128 = 4
• averaging-256 = 5
• averaging-512 = 6
• averaging-1024 = 7

For voltage-conversion-time:

• conversion-time-140us = 0
• conversion-time-204us = 1
• conversion-time-332us = 2
• conversion-time-588us = 3
• conversion-time-1-1ms = 4
• conversion-time-2-116ms = 5
• conversion-time-4-156ms = 6
• conversion-time-8-244ms = 7

For current-conversion-time:

• conversion-time-140us = 0
• conversion-time-204us = 1
• conversion-time-332us = 2
• conversion-time-588us = 3
• conversion-time-1-1ms = 4
• conversion-time-2-116ms = 5
• conversion-time-4-156ms = 6
• conversion-time-8-244ms = 7

Advanced Functions¶

tinkerforge call voltage-current-v2-bricklet <uid> set-calibration <voltage-multiplier> <voltage-divisor> <current-multiplier> <current-divisor>¶

Parameters:	<voltage-multiplier> – Type: Int, Range: [0 to 216 - 1] <voltage-divisor> – Type: Int, Range: [0 to 216 - 1] <current-multiplier> – Type: Int, Range: [0 to 216 - 1] <current-divisor> – Type: Int, Range: [0 to 216 - 1]
Output:	no output

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.

The calibration will be saved on the EEPROM of the Voltage/Current Bricklet and only needs to be done once.

tinkerforge call voltage-current-v2-bricklet <uid> get-calibration¶

Output:	voltage-multiplier – Type: Int, Range: [0 to 216 - 1] voltage-divisor – Type: Int, Range: [0 to 216 - 1] current-multiplier – Type: Int, Range: [0 to 216 - 1] current-divisor – Type: Int, Range: [0 to 216 - 1]

Returns the calibration as set by set-calibration.

tinkerforge call voltage-current-v2-bricklet <uid> get-spitfp-error-count¶

Output:	error-count-ack-checksum – Type: Int, Range: [0 to 232 - 1] error-count-message-checksum – Type: Int, Range: [0 to 232 - 1] error-count-frame – Type: Int, Range: [0 to 232 - 1] error-count-overflow – Type: Int, 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.

tinkerforge call voltage-current-v2-bricklet <uid> set-status-led-config <config>¶

Parameters:	<config> – Type: Int, Range: See symbols, Default: 3
Output:	no output

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 symbols are available for this function:

For <config>:

• status-led-config-off = 0
• status-led-config-on = 1
• status-led-config-show-heartbeat = 2
• status-led-config-show-status = 3

tinkerforge call voltage-current-v2-bricklet <uid> get-status-led-config¶

Output:	config – Type: Int, Range: See symbols, Default: 3

Returns the configuration as set by set-status-led-config

The following symbols are available for this function:

For config:

• status-led-config-off = 0
• status-led-config-on = 1
• status-led-config-show-heartbeat = 2
• status-led-config-show-status = 3

tinkerforge call voltage-current-v2-bricklet <uid> get-chip-temperature¶

Output:	temperature – Type: Int, 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.

tinkerforge call voltage-current-v2-bricklet <uid> reset¶

Output:	no output

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!

tinkerforge call voltage-current-v2-bricklet <uid> get-identity¶

Output:

uid – Type: String, Length: up to 8 connected-uid – Type: String, Length: up to 8 position – Type: Char, Range: [a to h, z] hardware-version – Type: Int Array, Length: 3 0: major – Type: Int, Range: [0 to 255] 1: minor – Type: Int, Range: [0 to 255] 2: revision – Type: Int, Range: [0 to 255] firmware-version – Type: Int Array, Length: 3 0: major – Type: Int, Range: [0 to 255] 1: minor – Type: Int, Range: [0 to 255] 2: revision – Type: Int, Range: [0 to 255] device-identifier – Type: Int, 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. 

Callback Configuration Functions¶

tinkerforge call voltage-current-v2-bricklet <uid> set-current-callback-configuration <period> <value-has-to-change> <option> <min> <max>¶

Parameters:	<period> – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 <value-has-to-change> – Type: Bool, Default: false <option> – Type: Char, Range: See symbols, Default: x <min> – Type: Int, Unit: 1 mA, Range: [-231 to 231 - 1], Default: 0 <max> – Type: Int, Unit: 1 mA, Range: [-231 to 231 - 1], Default: 0
Output:	no output

The period is the period with which the current 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 current 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 symbols are available for this function:

For <option>:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call voltage-current-v2-bricklet <uid> get-current-callback-configuration¶

Output:	period – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 value-has-to-change – Type: Bool, Default: false option – Type: Char, Range: See symbols, Default: x min – Type: Int, Unit: 1 mA, Range: [-231 to 231 - 1], Default: 0 max – Type: Int, Unit: 1 mA, Range: [-231 to 231 - 1], Default: 0

Returns the callback configuration as set by set-current-callback-configuration.

The following symbols are available for this function:

For option:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call voltage-current-v2-bricklet <uid> set-voltage-callback-configuration <period> <value-has-to-change> <option> <min> <max>¶

Parameters:	<period> – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 <value-has-to-change> – Type: Bool, Default: false <option> – Type: Char, Range: See symbols, Default: x <min> – Type: Int, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0 <max> – Type: Int, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0
Output:	no output

The period is the period with which the voltage 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 voltage 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 symbols are available for this function:

For <option>:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call voltage-current-v2-bricklet <uid> get-voltage-callback-configuration¶

Output:	period – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 value-has-to-change – Type: Bool, Default: false option – Type: Char, Range: See symbols, Default: x min – Type: Int, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0 max – Type: Int, Unit: 1 mV, Range: [-231 to 231 - 1], Default: 0

Returns the callback configuration as set by set-voltage-callback-configuration.

The following symbols are available for this function:

For option:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call voltage-current-v2-bricklet <uid> set-power-callback-configuration <period> <value-has-to-change> <option> <min> <max>¶

Parameters:	<period> – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 <value-has-to-change> – Type: Bool, Default: false <option> – Type: Char, Range: See symbols, Default: x <min> – Type: Int, Unit: 1 mW, Range: [-231 to 231 - 1], Default: 0 <max> – Type: Int, Unit: 1 mW, Range: [-231 to 231 - 1], Default: 0
Output:	no output

The period is the period with which the power 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 power 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 symbols are available for this function:

For <option>:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

tinkerforge call voltage-current-v2-bricklet <uid> get-power-callback-configuration¶

Output:	period – Type: Int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0 value-has-to-change – Type: Bool, Default: false option – Type: Char, Range: See symbols, Default: x min – Type: Int, Unit: 1 mW, Range: [-231 to 231 - 1], Default: 0 max – Type: Int, Unit: 1 mW, Range: [-231 to 231 - 1], Default: 0

Returns the callback configuration as set by set-power-callback-configuration.

The following symbols are available for this function:

For option:

• threshold-option-off = x
• threshold-option-outside = o
• threshold-option-inside = i
• threshold-option-smaller = <
• threshold-option-greater = >

Callbacks¶

Callbacks can be used to receive time critical or recurring data from the device:

tinkerforge dispatch voltage-current-v2-bricklet <uid> example

The available callbacks are described below.

tinkerforge dispatch voltage-current-v2-bricklet <uid> current¶

Output:	current – Type: Int, Unit: 1 mA, Range: [-20000 to 20000]

This callback is triggered periodically according to the configuration set by set-current-callback-configuration.

The parameter is the same as get-current.

tinkerforge dispatch voltage-current-v2-bricklet <uid> voltage¶

Output:	voltage – Type: Int, Unit: 1 mV, Range: [0 to 36000]

This callback is triggered periodically according to the configuration set by set-voltage-callback-configuration.

The parameter is the same as get-voltage.

tinkerforge dispatch voltage-current-v2-bricklet <uid> power¶

Output:	power – Type: Int, Unit: 1 mW, Range: [0 to 720000]

This callback is triggered periodically according to the configuration set by set-power-callback-configuration.

The parameter is the same as get-power.

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.

tinkerforge call voltage-current-v2-bricklet <uid> set-bootloader-mode <mode>¶

Parameters:	<mode> – Type: Int, Range: See symbols
Output:	status – Type: Int, Range: See symbols

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 symbols are available for this function:

For <mode>:

• bootloader-mode-bootloader = 0
• bootloader-mode-firmware = 1
• bootloader-mode-bootloader-wait-for-reboot = 2
• bootloader-mode-firmware-wait-for-reboot = 3
• bootloader-mode-firmware-wait-for-erase-and-reboot = 4

For status:

• bootloader-status-ok = 0
• bootloader-status-invalid-mode = 1
• bootloader-status-no-change = 2
• bootloader-status-entry-function-not-present = 3
• bootloader-status-device-identifier-incorrect = 4
• bootloader-status-crc-mismatch = 5

tinkerforge call voltage-current-v2-bricklet <uid> get-bootloader-mode¶

Output:	mode – Type: Int, Range: See symbols

Returns the current bootloader mode, see set-bootloader-mode.

The following symbols are available for this function:

For mode:

• bootloader-mode-bootloader = 0
• bootloader-mode-firmware = 1
• bootloader-mode-bootloader-wait-for-reboot = 2
• bootloader-mode-firmware-wait-for-reboot = 3
• bootloader-mode-firmware-wait-for-erase-and-reboot = 4

tinkerforge call voltage-current-v2-bricklet <uid> set-write-firmware-pointer <pointer>¶

Parameters:	<pointer> – Type: Int, Unit: 1 B, Range: [0 to 232 - 1]
Output:	no output

Sets the firmware pointer for write-firmware. 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.

tinkerforge call voltage-current-v2-bricklet <uid> write-firmware <data>¶

Parameters:	<data> – Type: Int Array, Length: 64, Range: [0 to 255]
Output:	status – Type: Int, Range: [0 to 255]

Writes 64 Bytes of firmware at the position as written by set-write-firmware-pointer 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.

tinkerforge call voltage-current-v2-bricklet <uid> write-uid <uid>¶

Parameters:	<uid> – Type: Int, Range: [0 to 232 - 1]
Output:	no output

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.

tinkerforge call voltage-current-v2-bricklet <uid> read-uid¶

Output:	uid – Type: Int, Range: [0 to 232 - 1]

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