PHP - Industrial Dual Analog In Bricklet

This is the description of the PHP API bindings for the Industrial Dual Analog In Bricklet. General information and technical specifications for the Industrial Dual Analog In Bricklet are summarized in its hardware description.

An installation guide for the PHP API bindings is part of their general description.

Examples

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

Simple

Download (ExampleSimple.php)

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<?php

require_once('Tinkerforge/IPConnection.php');
require_once('Tinkerforge/BrickletIndustrialDualAnalogIn.php');

use Tinkerforge\IPConnection;
use Tinkerforge\BrickletIndustrialDualAnalogIn;

const HOST = 'localhost';
const PORT = 4223;
const UID = 'XYZ'; // Change XYZ to the UID of your Industrial Dual Analog In Bricklet

$ipcon = new IPConnection(); // Create IP connection
$idai = new BrickletIndustrialDualAnalogIn(UID, $ipcon); // Create device object

$ipcon->connect(HOST, PORT); // Connect to brickd
// Don't use device before ipcon is connected

// Get current voltage from channel 1
$voltage = $idai->getVoltage(1);
echo "Voltage (Channel 1): " . $voltage/1000.0 . " V\n";

echo "Press key to exit\n";
fgetc(fopen('php://stdin', 'r'));
$ipcon->disconnect();

?>

Callback

Download (ExampleCallback.php)

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<?php

require_once('Tinkerforge/IPConnection.php');
require_once('Tinkerforge/BrickletIndustrialDualAnalogIn.php');

use Tinkerforge\IPConnection;
use Tinkerforge\BrickletIndustrialDualAnalogIn;

const HOST = 'localhost';
const PORT = 4223;
const UID = 'XYZ'; // Change XYZ to the UID of your Industrial Dual Analog In Bricklet

// Callback function for voltage callback
function cb_voltage($channel, $voltage)
{
    echo "Channel: $channel\n";
    echo "Voltage: " . $voltage/1000.0 . " V\n";
    echo "\n";
}

$ipcon = new IPConnection(); // Create IP connection
$idai = new BrickletIndustrialDualAnalogIn(UID, $ipcon); // Create device object

$ipcon->connect(HOST, PORT); // Connect to brickd
// Don't use device before ipcon is connected

// Register voltage callback to function cb_voltage
$idai->registerCallback(BrickletIndustrialDualAnalogIn::CALLBACK_VOLTAGE, 'cb_voltage');

// Set period for voltage (channel 1) callback to 1s (1000ms)
// Note: The voltage (channel 1) callback is only called every second
//       if the voltage (channel 1) has changed since the last call!
$idai->setVoltageCallbackPeriod(1, 1000);

echo "Press ctrl+c to exit\n";
$ipcon->dispatchCallbacks(-1); // Dispatch callbacks forever

?>

Threshold

Download (ExampleThreshold.php)

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<?php

require_once('Tinkerforge/IPConnection.php');
require_once('Tinkerforge/BrickletIndustrialDualAnalogIn.php');

use Tinkerforge\IPConnection;
use Tinkerforge\BrickletIndustrialDualAnalogIn;

const HOST = 'localhost';
const PORT = 4223;
const UID = 'XYZ'; // Change XYZ to the UID of your Industrial Dual Analog In Bricklet

// Callback function for voltage reached callback
function cb_voltageReached($channel, $voltage)
{
    echo "Channel: $channel\n";
    echo "Voltage: " . $voltage/1000.0 . " V\n";
    echo "\n";
}

$ipcon = new IPConnection(); // Create IP connection
$idai = new BrickletIndustrialDualAnalogIn(UID, $ipcon); // Create device object

$ipcon->connect(HOST, PORT); // Connect to brickd
// Don't use device before ipcon is connected

// Get threshold callbacks with a debounce time of 10 seconds (10000ms)
$idai->setDebouncePeriod(10000);

// Register voltage reached callback to function cb_voltageReached
$idai->registerCallback(BrickletIndustrialDualAnalogIn::CALLBACK_VOLTAGE_REACHED,
                        'cb_voltageReached');

// Configure threshold for voltage (channel 1) "greater than 10 V"
$idai->setVoltageCallbackThreshold(1, '>', 10*1000, 0);

echo "Press ctrl+c to exit\n";
$ipcon->dispatchCallbacks(-1); // Dispatch callbacks forever

?>

API

Functions that return multiple values return them in an associative array.

The Bricklet has two input channel. Functions that are related directly to a channel have a channel parameter to specify one of the two channels. Valid values for the channel parameter are 0 and 1.

Basic Functions

class BrickletIndustrialDualAnalogIn(string $uid, IPConnection $ipcon)
Parameters:
  • $uid – Type: string
  • $ipcon – Type: IPConnection
Returns:
  • $industrial_dual_analog_in – Type: BrickletIndustrialDualAnalogIn

Creates an object with the unique device ID $uid:

<?php   $industrial_dual_analog_in = new BrickletIndustrialDualAnalogIn('YOUR_DEVICE_UID', $ipcon);   ?>

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

int BrickletIndustrialDualAnalogIn::getVoltage(int $channel)
Parameters:
  • $channel – Type: int, Range: [0 to 255]
Returns:
  • $voltage – Type: int, Range: [-231 to 231 - 1]

Returns the voltage for the given channel in mV.

If you want to get the voltage periodically, it is recommended to use the CALLBACK_VOLTAGE callback and set the period with setVoltageCallbackPeriod().

Advanced Functions

void BrickletIndustrialDualAnalogIn::setSampleRate(int $rate)
Parameters:
  • $rate – Type: int, Range: See constants

Sets the sample rate. The sample rate can be between 1 sample per second and 976 samples per second. Decreasing the sample rate will also decrease the noise on the data.

The default value is 6 (2 samples per second).

The following constants are available for this function:

For $rate:

  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_976_SPS = 0
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_488_SPS = 1
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_244_SPS = 2
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_122_SPS = 3
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_61_SPS = 4
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_4_SPS = 5
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_2_SPS = 6
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_1_SPS = 7
int BrickletIndustrialDualAnalogIn::getSampleRate()
Returns:
  • $rate – Type: int, Range: See constants

Returns the sample rate as set by setSampleRate().

The following constants are available for this function:

For $rate:

  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_976_SPS = 0
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_488_SPS = 1
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_244_SPS = 2
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_122_SPS = 3
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_61_SPS = 4
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_4_SPS = 5
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_2_SPS = 6
  • BrickletIndustrialDualAnalogIn::SAMPLE_RATE_1_SPS = 7
void BrickletIndustrialDualAnalogIn::setCalibration(array $offset, array $gain)
Parameters:
  • $offset – Type: array(int, ...), Length: 2, Range: [-231 to 231 - 1]
  • $gain – Type: array(int, ...), Length: 2, Range: [-231 to 231 - 1]

Sets offset and gain of MCP3911 internal calibration registers.

See MCP3911 datasheet 7.7 and 7.8. The Industrial Dual Analog In Bricklet is already factory calibrated by Tinkerforge. It should not be necessary for you to use this function

array BrickletIndustrialDualAnalogIn::getCalibration()
Return Array:
  • 'offset' – Type: array(int, ...), Length: 2, Range: [-231 to 231 - 1]
  • 'gain' – Type: array(int, ...), Length: 2, Range: [-231 to 231 - 1]

Returns the calibration as set by setCalibration().

array BrickletIndustrialDualAnalogIn::getADCValues()
Returns:
  • $value – Type: array(int, ...), Length: 2, Range: [-231 to 231 - 1]

Returns the ADC values as given by the MCP3911 IC. This function is needed for proper calibration, see setCalibration().

array BrickletIndustrialDualAnalogIn::getAPIVersion()
Returns:
  • $api_version – Type: array(int, ...), Length: 3, Range: [0 to 255]

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.

bool BrickletIndustrialDualAnalogIn::getResponseExpected(int $function_id)
Parameters:
  • $function_id – Type: int, Range: See constants
Returns:
  • $response_expected – Type: bool

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 $function_id:

  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_VOLTAGE_CALLBACK_PERIOD = 2
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_VOLTAGE_CALLBACK_THRESHOLD = 4
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_DEBOUNCE_PERIOD = 6
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_SAMPLE_RATE = 8
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_CALIBRATION = 10
void BrickletIndustrialDualAnalogIn::setResponseExpected(int $function_id, bool $response_expected)
Parameters:
  • $function_id – Type: int, Range: See constants
  • $response_expected – Type: bool

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 $function_id:

  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_VOLTAGE_CALLBACK_PERIOD = 2
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_VOLTAGE_CALLBACK_THRESHOLD = 4
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_DEBOUNCE_PERIOD = 6
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_SAMPLE_RATE = 8
  • BrickletIndustrialDualAnalogIn::FUNCTION_SET_CALIBRATION = 10
void BrickletIndustrialDualAnalogIn::setResponseExpectedAll(bool $response_expected)
Parameters:
  • $response_expected – Type: bool

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

array BrickletIndustrialDualAnalogIn::getIdentity()
Return Array:
  • 'uid' – Type: string, Length: up to 8
  • 'connected_uid' – Type: string, Length: up to 8
  • 'position' – Type: string
  • 'hardware_version' – Type: array(int, ...), Length: 3, Range: [0 to 255]
  • 'firmware_version' – Type: array(int, ...), Length: 3, 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' 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

void BrickletIndustrialDualAnalogIn::registerCallback(int $callback_id, callable $callback, mixed $user_data=NULL)
Parameters:
  • $callback_id – Type: int
  • $callback – Type: callable
  • $user_data – Type: mixed

Registers the given $function with the given $callback_id. The optional $user_data will be passed as the last parameter to the function.

The available callback IDs with corresponding function signatures are listed below.

void BrickletIndustrialDualAnalogIn::setVoltageCallbackPeriod(int $channel, int $period)
Parameters:
  • $channel – Type: int, Range: [0 to 255]
  • $period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0

Sets the period with which the CALLBACK_VOLTAGE callback is triggered periodically for the given channel. A value of 0 turns the callback off.

The CALLBACK_VOLTAGE callback is only triggered if the voltage has changed since the last triggering.

int BrickletIndustrialDualAnalogIn::getVoltageCallbackPeriod(int $channel)
Parameters:
  • $channel – Type: int, Range: [0 to 255]
Returns:
  • $period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0

Returns the period as set by setVoltageCallbackPeriod().

void BrickletIndustrialDualAnalogIn::setVoltageCallbackThreshold(int $channel, string $option, int $min, int $max)
Parameters:
  • $channel – Type: int, Range: [0 to 255]
  • $option – Type: string, Range: See constants, Default: 'x'
  • $min – Type: int, Range: [-231 to 231 - 1]
  • $max – Type: int, Range: [-231 to 231 - 1]

Sets the thresholds for the CALLBACK_VOLTAGE_REACHED callback for the given channel.

The following options are possible:

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

The default value is ('x', 0, 0).

The following constants are available for this function:

For $option:

  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_OFF = 'x'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_OUTSIDE = 'o'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_INSIDE = 'i'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_SMALLER = '<'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_GREATER = '>'
array BrickletIndustrialDualAnalogIn::getVoltageCallbackThreshold(int $channel)
Parameters:
  • $channel – Type: int, Range: [0 to 255]
Return Array:
  • 'option' – Type: string, Range: See constants, Default: 'x'
  • 'min' – Type: int, Range: [-231 to 231 - 1]
  • 'max' – Type: int, Range: [-231 to 231 - 1]

Returns the threshold as set by setVoltageCallbackThreshold().

The following constants are available for this function:

For $option:

  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_OFF = 'x'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_OUTSIDE = 'o'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_INSIDE = 'i'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_SMALLER = '<'
  • BrickletIndustrialDualAnalogIn::THRESHOLD_OPTION_GREATER = '>'
void BrickletIndustrialDualAnalogIn::setDebouncePeriod(int $debounce)
Parameters:
  • $debounce – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100

Sets the period with which the threshold callback

is triggered, if the threshold

keeps being reached.

int BrickletIndustrialDualAnalogIn::getDebouncePeriod()
Returns:
  • $debounce – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100

Returns the debounce period as set by setDebouncePeriod().

Callbacks

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done with the registerCallback() function of the device object. The first parameter is the callback ID and the second parameter the callback function:

<?php

function myCallback($param)
{
    echo $param . "\n";
}

$industrial_dual_analog_in->registerCallback(BrickletIndustrialDualAnalogIn::CALLBACK_EXAMPLE, 'myCallback');

?>

The available constants with corresponding function signatures 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.

int BrickletIndustrialDualAnalogIn::CALLBACK_VOLTAGE
<?php   void callback(int $channel, int $voltage [, mixed $user_data])   ?>
Callback Parameters:
  • $channel – Type: int, Range: [0 to 255]
  • $voltage – Type: int, Range: [-231 to 231 - 1]
  • $user_data – Type: mixed

This callback is triggered periodically with the period that is set by setVoltageCallbackPeriod(). The parameter is the voltage of the channel.

The CALLBACK_VOLTAGE callback is only triggered if the voltage has changed since the last triggering.

int BrickletIndustrialDualAnalogIn::CALLBACK_VOLTAGE_REACHED
<?php   void callback(int $channel, int $voltage [, mixed $user_data])   ?>
Callback Parameters:
  • $channel – Type: int, Range: [0 to 255]
  • $voltage – Type: int, Range: [-231 to 231 - 1]
  • $user_data – Type: mixed

This callback is triggered when the threshold as set by setVoltageCallbackThreshold() is reached. The parameter is the voltage of the channel.

If the threshold keeps being reached, the callback is triggered periodically with the period as set by setDebouncePeriod().

Constants

int BrickletIndustrialDualAnalogIn::DEVICE_IDENTIFIER

This constant is used to identify a Industrial Dual Analog In Bricklet.

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

string BrickletIndustrialDualAnalogIn::DEVICE_DISPLAY_NAME

This constant represents the human readable name of a Industrial Dual Analog In Bricklet.