JavaScript - Color Bricklet

This is the description of the JavaScript API bindings for the Color Bricklet. General information and technical specifications for the Color Bricklet are summarized in its hardware description.

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

Examples

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

Simple (Node.js)

Download (ExampleSimple.js)

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var Tinkerforge = require('tinkerforge');

var HOST = 'localhost';
var PORT = 4223;
var UID = 'XYZ'; // Change XYZ to the UID of your Color Bricklet

var ipcon = new Tinkerforge.IPConnection(); // Create IP connection
var c = new Tinkerforge.BrickletColor(UID, ipcon); // Create device object

ipcon.connect(HOST, PORT,
    function (error) {
        console.log('Error: ' + error);
    }
); // Connect to brickd
// Don't use device before ipcon is connected

ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
    function (connectReason) {
        // Get current color
        c.getColor(
            function (r, g, b, c) {
                console.log('Color [R]: ' + r);
                console.log('Color [G]: ' + g);
                console.log('Color [B]: ' + b);
                console.log('Color [C]: ' + c);
            },
            function (error) {
                console.log('Error: ' + error);
            }
        );
    }
);

console.log('Press key to exit');
process.stdin.on('data',
    function (data) {
        ipcon.disconnect();
        process.exit(0);
    }
);

Callback (Node.js)

Download (ExampleCallback.js)

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var Tinkerforge = require('tinkerforge');

var HOST = 'localhost';
var PORT = 4223;
var UID = 'XYZ'; // Change XYZ to the UID of your Color Bricklet

var ipcon = new Tinkerforge.IPConnection(); // Create IP connection
var c = new Tinkerforge.BrickletColor(UID, ipcon); // Create device object

ipcon.connect(HOST, PORT,
    function (error) {
        console.log('Error: ' + error);
    }
); // Connect to brickd
// Don't use device before ipcon is connected

ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
    function (connectReason) {
        // Set period for color callback to 1s (1000ms)
        // Note: The color callback is only called every second
        //       if the color has changed since the last call!
        c.setColorCallbackPeriod(1000);
    }
);

// Register color callback
c.on(Tinkerforge.BrickletColor.CALLBACK_COLOR,
    // Callback function for color callback
    function (r, g, b, c) {
        console.log('Color [R]: ' + r);
        console.log('Color [G]: ' + g);
        console.log('Color [B]: ' + b);
        console.log('Color [C]: ' + c);
        console.log();
    }
);

console.log('Press key to exit');
process.stdin.on('data',
    function (data) {
        ipcon.disconnect();
        process.exit(0);
    }
);

Threshold (Node.js)

Download (ExampleThreshold.js)

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var Tinkerforge = require('tinkerforge');

var HOST = 'localhost';
var PORT = 4223;
var UID = 'XYZ'; // Change XYZ to the UID of your Color Bricklet

var ipcon = new Tinkerforge.IPConnection(); // Create IP connection
var c = new Tinkerforge.BrickletColor(UID, ipcon); // Create device object

ipcon.connect(HOST, PORT,
    function (error) {
        console.log('Error: ' + error);
    }
); // Connect to brickd
// Don't use device before ipcon is connected

ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
    function (connectReason) {
        // Get threshold callbacks with a debounce time of 10 seconds (10000ms)
        c.setDebouncePeriod(10000);

        // Configure threshold for color "greater than 100, 200, 300, 400"
        c.setColorCallbackThreshold('>', 100, 0, 200, 0, 300, 0, 400, 0);
    }
);

// Register color reached callback
c.on(Tinkerforge.BrickletColor.CALLBACK_COLOR_REACHED,
    // Callback function for color reached callback
    function (r, g, b, c) {
        console.log('Color [R]: ' + r);
        console.log('Color [G]: ' + g);
        console.log('Color [B]: ' + b);
        console.log('Color [C]: ' + c);
        console.log();
    }
);

console.log('Press key to exit');
process.stdin.on('data',
    function (data) {
        ipcon.disconnect();
        process.exit(0);
    }
);

Simple (HTML)

Download (ExampleSimple.html), Test (ExampleSimple.html)

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<!DOCTYPE html>
<html>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <head>
        <title>Tinkerforge | JavaScript Example</title>
    </head>
    <body>
        <div style="text-align:center;">
            <h1>Color Bricklet Simple Example</h1>
            <p>
                <input value="localhost" id="host" type="text" size="20">:
                <input value="4280" id="port" type="text" size="5">,
                <input value="uid" id="uid" type="text" size="5">
                <input value="Start Example" id="start" type="button" onclick="startExample();">
            </p>
            <p>
                <textarea readonly id="text" cols="80" rows="24" style="resize:none;"
                          >Press "Start Example" to begin ...</textarea>
            </p>
        </div>
        <script src="./Tinkerforge.js" type='text/javascript'></script>
        <script type='text/javascript'>
            var ipcon;
            var textArea = document.getElementById("text");
            function startExample() {
                textArea.value = "";
                var HOST = document.getElementById("host").value;
                var PORT = parseInt(document.getElementById("port").value);
                var UID = document.getElementById("uid").value;
                if(ipcon !== undefined) {
                    ipcon.disconnect();
                }
                ipcon = new Tinkerforge.IPConnection(); // Create IP connection
                var c = new Tinkerforge.BrickletColor(UID, ipcon); // Create device object
                ipcon.connect(HOST, PORT,
                    function(error) {
                        textArea.value += 'Error: ' + error + '\n';
                    }
                ); // Connect to brickd
                // Don't use device before ipcon is connected

                ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
                    function (connectReason) {
                        // Get current color
                        c.getColor(
                            function (r, g, b, c) {
                                textArea.value += 'Color [R]: ' + r + '\n';
                                textArea.value += 'Color [G]: ' + g + '\n';
                                textArea.value += 'Color [B]: ' + b + '\n';
                                textArea.value += 'Color [C]: ' + c + '\n';
                            },
                            function (error) {
                                textArea.value += 'Error: ' + error + '\n';
                            }
                        );
                    }
                );
            }
        </script>
    </body>
</html>

Callback (HTML)

Download (ExampleCallback.html), Test (ExampleCallback.html)

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<!DOCTYPE html>
<html>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <head>
        <title>Tinkerforge | JavaScript Example</title>
    </head>
    <body>
        <div style="text-align:center;">
            <h1>Color Bricklet Callback Example</h1>
            <p>
                <input value="localhost" id="host" type="text" size="20">:
                <input value="4280" id="port" type="text" size="5">,
                <input value="uid" id="uid" type="text" size="5">
                <input value="Start Example" id="start" type="button" onclick="startExample();">
            </p>
            <p>
                <textarea readonly id="text" cols="80" rows="24" style="resize:none;"
                          >Press "Start Example" to begin ...</textarea>
            </p>
        </div>
        <script src="./Tinkerforge.js" type='text/javascript'></script>
        <script type='text/javascript'>
            var ipcon;
            var textArea = document.getElementById("text");
            function startExample() {
                textArea.value = "";
                var HOST = document.getElementById("host").value;
                var PORT = parseInt(document.getElementById("port").value);
                var UID = document.getElementById("uid").value;
                if(ipcon !== undefined) {
                    ipcon.disconnect();
                }
                ipcon = new Tinkerforge.IPConnection(); // Create IP connection
                var c = new Tinkerforge.BrickletColor(UID, ipcon); // Create device object
                ipcon.connect(HOST, PORT,
                    function(error) {
                        textArea.value += 'Error: ' + error + '\n';
                    }
                ); // Connect to brickd
                // Don't use device before ipcon is connected

                ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
                    function (connectReason) {
                        // Set period for color callback to 1s (1000ms)
                        // Note: The color callback is only called every second
                        //       if the color has changed since the last call!
                        c.setColorCallbackPeriod(1000);
                    }
                );

                // Register color callback
                c.on(Tinkerforge.BrickletColor.CALLBACK_COLOR,
                    // Callback function for color callback
                    function (r, g, b, c) {
                        textArea.value += 'Color [R]: ' + r + '\n';
                        textArea.value += 'Color [G]: ' + g + '\n';
                        textArea.value += 'Color [B]: ' + b + '\n';
                        textArea.value += 'Color [C]: ' + c + '\n';
                        textArea.value += '\n';
                        textArea.scrollTop = textArea.scrollHeight;
                    }
                );
            }
        </script>
    </body>
</html>

Threshold (HTML)

Download (ExampleThreshold.html), Test (ExampleThreshold.html)

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<!DOCTYPE html>
<html>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <head>
        <title>Tinkerforge | JavaScript Example</title>
    </head>
    <body>
        <div style="text-align:center;">
            <h1>Color Bricklet Threshold Example</h1>
            <p>
                <input value="localhost" id="host" type="text" size="20">:
                <input value="4280" id="port" type="text" size="5">,
                <input value="uid" id="uid" type="text" size="5">
                <input value="Start Example" id="start" type="button" onclick="startExample();">
            </p>
            <p>
                <textarea readonly id="text" cols="80" rows="24" style="resize:none;"
                          >Press "Start Example" to begin ...</textarea>
            </p>
        </div>
        <script src="./Tinkerforge.js" type='text/javascript'></script>
        <script type='text/javascript'>
            var ipcon;
            var textArea = document.getElementById("text");
            function startExample() {
                textArea.value = "";
                var HOST = document.getElementById("host").value;
                var PORT = parseInt(document.getElementById("port").value);
                var UID = document.getElementById("uid").value;
                if(ipcon !== undefined) {
                    ipcon.disconnect();
                }
                ipcon = new Tinkerforge.IPConnection(); // Create IP connection
                var c = new Tinkerforge.BrickletColor(UID, ipcon); // Create device object
                ipcon.connect(HOST, PORT,
                    function(error) {
                        textArea.value += 'Error: ' + error + '\n';
                    }
                ); // Connect to brickd
                // Don't use device before ipcon is connected

                ipcon.on(Tinkerforge.IPConnection.CALLBACK_CONNECTED,
                    function (connectReason) {
                        // Get threshold callbacks with a debounce time of 10 seconds (10000ms)
                        c.setDebouncePeriod(10000);

                        // Configure threshold for color "greater than 100, 200, 300, 400"
                        c.setColorCallbackThreshold('>', 100, 0, 200, 0, 300, 0, 400, 0);
                    }
                );

                // Register color reached callback
                c.on(Tinkerforge.BrickletColor.CALLBACK_COLOR_REACHED,
                    // Callback function for color reached callback
                    function (r, g, b, c) {
                        textArea.value += 'Color [R]: ' + r + '\n';
                        textArea.value += 'Color [G]: ' + g + '\n';
                        textArea.value += 'Color [B]: ' + b + '\n';
                        textArea.value += 'Color [C]: ' + c + '\n';
                        textArea.value += '\n';
                        textArea.scrollTop = textArea.scrollHeight;
                    }
                );
            }
        </script>
    </body>
</html>

API

Generally, every function of the JavaScript bindings can take two optional parameters, returnCallback and errorCallback. These are two user defined callback functions. The returnCallback function is called with the results as arguments, if the function returns its results asynchronously. The errorCallback is called with an error code in case of an error. The error code can be one of the following values:

  • IPConnection.ERROR_ALREADY_CONNECTED = 11
  • IPConnection.ERROR_NOT_CONNECTED = 12
  • IPConnection.ERROR_CONNECT_FAILED = 13
  • IPConnection.ERROR_INVALID_FUNCTION_ID = 21
  • IPConnection.ERROR_TIMEOUT = 31
  • IPConnection.ERROR_INVALID_PARAMETER = 41
  • IPConnection.ERROR_FUNCTION_NOT_SUPPORTED = 42
  • IPConnection.ERROR_UNKNOWN_ERROR = 43
  • IPConnection.ERROR_STREAM_OUT_OF_SYNC = 51
  • IPConnection.ERROR_NON_ASCII_CHAR_IN_SECRET = 71

The namespace for the JavaScript bindings is Tinkerforge.*.

Basic Functions

new BrickletColor(uid, ipcon)
Parameters:
  • uid – Type: string
  • ipcon – Type: IPConnection
Returns:
  • color – Type: BrickletColor

Creates an object with the unique device ID uid:

var color = new BrickletColor("YOUR_DEVICE_UID", ipcon);

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

BrickletColor.getColor([returnCallback][, errorCallback])
Callback Parameters:
  • r – Type: int, Range: [0 to 216 - 1]
  • g – Type: int, Range: [0 to 216 - 1]
  • b – Type: int, Range: [0 to 216 - 1]
  • c – Type: int, Range: [0 to 216 - 1]
Returns:
  • undefined

Returns the measured color of the sensor.

The red (r), green (g), blue (b) and clear (c) colors are measured with four different photodiodes that are responsive at different wavelengths:

Chart Responsivity / Wavelength

If you want to get the color periodically, it is recommended to use the CALLBACK_COLOR callback and set the period with setColorCallbackPeriod().

BrickletColor.lightOn([returnCallback][, errorCallback])
Callback Parameters:
  • undefined
Returns:
  • undefined

Turns the LED on.

BrickletColor.lightOff([returnCallback][, errorCallback])
Callback Parameters:
  • undefined
Returns:
  • undefined

Turns the LED off.

BrickletColor.isLightOn([returnCallback][, errorCallback])
Callback Parameters:
  • light – Type: int, Range: See constants, Default: 1
Returns:
  • undefined

Returns the state of the LED. Possible values are:

  • 0: On
  • 1: Off

The following constants are available for this function:

For light:

  • BrickletColor.LIGHT_ON = 0
  • BrickletColor.LIGHT_OFF = 1
BrickletColor.setConfig(gain, integrationTime[, returnCallback][, errorCallback])
Parameters:
  • gain – Type: int, Range: See constants, Default: 3
  • integrationTime – Type: int, Range: See constants, Default: 3
Callback Parameters:
  • undefined
Returns:
  • undefined

Sets the configuration of the sensor. Gain and integration time can be configured in this way.

For configuring the gain:

  • 0: 1x Gain
  • 1: 4x Gain
  • 2: 16x Gain
  • 3: 60x Gain

For configuring the integration time:

  • 0: 2.4ms
  • 1: 24ms
  • 2: 101ms
  • 3: 154ms
  • 4: 700ms

Increasing the gain enables the sensor to detect a color from a higher distance.

The integration time provides a trade-off between conversion time and accuracy. With a longer integration time the values read will be more accurate but it will take longer time to get the conversion results.

The following constants are available for this function:

For gain:

  • BrickletColor.GAIN_1X = 0
  • BrickletColor.GAIN_4X = 1
  • BrickletColor.GAIN_16X = 2
  • BrickletColor.GAIN_60X = 3

For integration_time:

  • BrickletColor.INTEGRATION_TIME_2MS = 0
  • BrickletColor.INTEGRATION_TIME_24MS = 1
  • BrickletColor.INTEGRATION_TIME_101MS = 2
  • BrickletColor.INTEGRATION_TIME_154MS = 3
  • BrickletColor.INTEGRATION_TIME_700MS = 4
BrickletColor.getConfig([returnCallback][, errorCallback])
Callback Parameters:
  • gain – Type: int, Range: See constants, Default: 3
  • integrationTime – Type: int, Range: See constants, Default: 3
Returns:
  • undefined

Returns the configuration as set by setConfig().

The following constants are available for this function:

For gain:

  • BrickletColor.GAIN_1X = 0
  • BrickletColor.GAIN_4X = 1
  • BrickletColor.GAIN_16X = 2
  • BrickletColor.GAIN_60X = 3

For integration_time:

  • BrickletColor.INTEGRATION_TIME_2MS = 0
  • BrickletColor.INTEGRATION_TIME_24MS = 1
  • BrickletColor.INTEGRATION_TIME_101MS = 2
  • BrickletColor.INTEGRATION_TIME_154MS = 3
  • BrickletColor.INTEGRATION_TIME_700MS = 4
BrickletColor.getIlluminance([returnCallback][, errorCallback])
Callback Parameters:
  • illuminance – Type: int, Unit: ? lx, Range: [0 to 103438]
Returns:
  • undefined

Returns the illuminance affected by the gain and integration time as set by setConfig(). To get the illuminance in Lux apply this formula:

lux = illuminance * 700 / gain / integration_time

To get a correct illuminance measurement make sure that the color values themselves are not saturated. The color value (R, G or B) is saturated if it is equal to the maximum value of 65535. In that case you have to reduce the gain, see setConfig().

BrickletColor.getColorTemperature([returnCallback][, errorCallback])
Callback Parameters:
  • colorTemperature – Type: int, Unit: 1 K, Range: [0 to 216 - 1]
Returns:
  • undefined

Returns the color temperature.

To get a correct color temperature measurement make sure that the color values themselves are not saturated. The color value (R, G or B) is saturated if it is equal to the maximum value of 65535. In that case you have to reduce the gain, see setConfig().

Advanced Functions

BrickletColor.getIdentity([returnCallback][, errorCallback])
Callback Parameters:
  • uid – Type: string, Length: up to 8
  • connectedUid – Type: string, Length: up to 8
  • position – Type: char, Range: ['a' to 'h', 'i', 'z']
  • hardwareVersion – Type: [int, ...], 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]
  • firmwareVersion – Type: [int, ...], 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]
  • deviceIdentifier – Type: int, Range: [0 to 216 - 1]
Returns:
  • undefined

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

BrickletColor.on(callback_id, function)
Parameters:
  • callback_id – Type: int
  • function – Type: function
Returns:
  • undefined

Registers the given function with the given callback_id.

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

BrickletColor.setColorCallbackPeriod(period[, returnCallback][, errorCallback])
Parameters:
  • period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Callback Parameters:
  • undefined
Returns:
  • undefined

Sets the period with which the CALLBACK_COLOR callback is triggered periodically. A value of 0 turns the callback off.

The CALLBACK_COLOR callback is only triggered if the color has changed since the last triggering.

BrickletColor.getColorCallbackPeriod([returnCallback][, errorCallback])
Callback Parameters:
  • period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Returns:
  • undefined

Returns the period as set by setColorCallbackPeriod().

BrickletColor.setColorCallbackThreshold(option, minR, maxR, minG, maxG, minB, maxB, minC, maxC[, returnCallback][, errorCallback])
Parameters:
  • option – Type: char, Range: See constants, Default: 'x'
  • minR – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxR – Type: int, Range: [0 to 216 - 1], Default: 0
  • minG – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxG – Type: int, Range: [0 to 216 - 1], Default: 0
  • minB – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxB – Type: int, Range: [0 to 216 - 1], Default: 0
  • minC – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxC – Type: int, Range: [0 to 216 - 1], Default: 0
Callback Parameters:
  • undefined
Returns:
  • undefined

Sets the thresholds for the CALLBACK_COLOR_REACHED callback.

The following options are possible:

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

The following constants are available for this function:

For option:

  • BrickletColor.THRESHOLD_OPTION_OFF = 'x'
  • BrickletColor.THRESHOLD_OPTION_OUTSIDE = 'o'
  • BrickletColor.THRESHOLD_OPTION_INSIDE = 'i'
  • BrickletColor.THRESHOLD_OPTION_SMALLER = '<'
  • BrickletColor.THRESHOLD_OPTION_GREATER = '>'
BrickletColor.getColorCallbackThreshold([returnCallback][, errorCallback])
Callback Parameters:
  • option – Type: char, Range: See constants, Default: 'x'
  • minR – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxR – Type: int, Range: [0 to 216 - 1], Default: 0
  • minG – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxG – Type: int, Range: [0 to 216 - 1], Default: 0
  • minB – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxB – Type: int, Range: [0 to 216 - 1], Default: 0
  • minC – Type: int, Range: [0 to 216 - 1], Default: 0
  • maxC – Type: int, Range: [0 to 216 - 1], Default: 0
Returns:
  • undefined

Returns the threshold as set by setColorCallbackThreshold().

The following constants are available for this function:

For option:

  • BrickletColor.THRESHOLD_OPTION_OFF = 'x'
  • BrickletColor.THRESHOLD_OPTION_OUTSIDE = 'o'
  • BrickletColor.THRESHOLD_OPTION_INSIDE = 'i'
  • BrickletColor.THRESHOLD_OPTION_SMALLER = '<'
  • BrickletColor.THRESHOLD_OPTION_GREATER = '>'
BrickletColor.setDebouncePeriod(debounce[, returnCallback][, errorCallback])
Parameters:
  • debounce – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100
Callback Parameters:
  • undefined
Returns:
  • undefined

Sets the period with which the threshold callback

is triggered, if the threshold

keeps being reached.

BrickletColor.getDebouncePeriod([returnCallback][, errorCallback])
Callback Parameters:
  • debounce – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 100
Returns:
  • undefined

Returns the debounce period as set by setDebouncePeriod().

BrickletColor.setIlluminanceCallbackPeriod(period[, returnCallback][, errorCallback])
Parameters:
  • period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Callback Parameters:
  • undefined
Returns:
  • undefined

Sets the period with which the CALLBACK_ILLUMINANCE callback is triggered periodically. A value of 0 turns the callback off.

The CALLBACK_ILLUMINANCE callback is only triggered if the illuminance has changed since the last triggering.

BrickletColor.getIlluminanceCallbackPeriod([returnCallback][, errorCallback])
Callback Parameters:
  • period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Returns:
  • undefined

Returns the period as set by setIlluminanceCallbackPeriod().

BrickletColor.setColorTemperatureCallbackPeriod(period[, returnCallback][, errorCallback])
Parameters:
  • period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Callback Parameters:
  • undefined
Returns:
  • undefined

Sets the period with which the CALLBACK_COLOR_TEMPERATURE callback is triggered periodically. A value of 0 turns the callback off.

The CALLBACK_COLOR_TEMPERATURE callback is only triggered if the color temperature has changed since the last triggering.

BrickletColor.getColorTemperatureCallbackPeriod([returnCallback][, errorCallback])
Callback Parameters:
  • period – Type: int, Unit: 1 ms, Range: [0 to 232 - 1], Default: 0
Returns:
  • undefined

Returns the period as set by setColorTemperatureCallbackPeriod().

Callbacks

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

color.on(BrickletColor.CALLBACK_EXAMPLE,
    function (param) {
        console.log(param);
    }
);

The available constants with inherent number and 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.

BrickletColor.CALLBACK_COLOR
Callback Parameters:
  • r – Type: int, Range: [0 to 216 - 1]
  • g – Type: int, Range: [0 to 216 - 1]
  • b – Type: int, Range: [0 to 216 - 1]
  • c – Type: int, Range: [0 to 216 - 1]

This callback is triggered periodically with the period that is set by setColorCallbackPeriod(). The parameter is the color of the sensor as RGBC.

The CALLBACK_COLOR callback is only triggered if the color has changed since the last triggering.

BrickletColor.CALLBACK_COLOR_REACHED
Callback Parameters:
  • r – Type: int, Range: [0 to 216 - 1]
  • g – Type: int, Range: [0 to 216 - 1]
  • b – Type: int, Range: [0 to 216 - 1]
  • c – Type: int, Range: [0 to 216 - 1]

This callback is triggered when the threshold as set by setColorCallbackThreshold() is reached. The parameter is the color of the sensor as RGBC.

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

BrickletColor.CALLBACK_ILLUMINANCE
Callback Parameters:
  • illuminance – Type: int, Unit: ? lx, Range: [0 to 103438]

This callback is triggered periodically with the period that is set by setIlluminanceCallbackPeriod(). The parameter is the illuminance. See getIlluminance() for how to interpret this value.

The CALLBACK_ILLUMINANCE callback is only triggered if the illuminance has changed since the last triggering.

BrickletColor.CALLBACK_COLOR_TEMPERATURE
Callback Parameters:
  • colorTemperature – Type: int, Unit: 1 K, Range: [0 to 216 - 1]

This callback is triggered periodically with the period that is set by setColorTemperatureCallbackPeriod(). The parameter is the color temperature.

The CALLBACK_COLOR_TEMPERATURE callback is only triggered if the color temperature has changed since the last triggering.

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.

BrickletColor.getAPIVersion()
Returns:
  • apiVersion – Type: [int, ...], 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]

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.

BrickletColor.getResponseExpected(functionId[, errorCallback])
Parameters:
  • functionId – Type: int, Range: See constants
Returns:
  • responseExpected – Type: 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.

The following constants are available for this function:

For function_id:

  • BrickletColor.FUNCTION_SET_COLOR_CALLBACK_PERIOD = 2
  • BrickletColor.FUNCTION_SET_COLOR_CALLBACK_THRESHOLD = 4
  • BrickletColor.FUNCTION_SET_DEBOUNCE_PERIOD = 6
  • BrickletColor.FUNCTION_LIGHT_ON = 10
  • BrickletColor.FUNCTION_LIGHT_OFF = 11
  • BrickletColor.FUNCTION_SET_CONFIG = 13
  • BrickletColor.FUNCTION_SET_ILLUMINANCE_CALLBACK_PERIOD = 17
  • BrickletColor.FUNCTION_SET_COLOR_TEMPERATURE_CALLBACK_PERIOD = 19
BrickletColor.setResponseExpected(functionId, responseExpected[, errorCallback])
Parameters:
  • functionId – Type: int, Range: See constants
  • responseExpected – Type: boolean
Returns:
  • undefined

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:

  • BrickletColor.FUNCTION_SET_COLOR_CALLBACK_PERIOD = 2
  • BrickletColor.FUNCTION_SET_COLOR_CALLBACK_THRESHOLD = 4
  • BrickletColor.FUNCTION_SET_DEBOUNCE_PERIOD = 6
  • BrickletColor.FUNCTION_LIGHT_ON = 10
  • BrickletColor.FUNCTION_LIGHT_OFF = 11
  • BrickletColor.FUNCTION_SET_CONFIG = 13
  • BrickletColor.FUNCTION_SET_ILLUMINANCE_CALLBACK_PERIOD = 17
  • BrickletColor.FUNCTION_SET_COLOR_TEMPERATURE_CALLBACK_PERIOD = 19
BrickletColor.setResponseExpectedAll(responseExpected)
Parameters:
  • responseExpected – Type: boolean
Returns:
  • undefined

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

Constants

BrickletColor.DEVICE_IDENTIFIER

This constant is used to identify a Color Bricklet.

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

BrickletColor.DEVICE_DISPLAY_NAME

This constant represents the human readable name of a Color Bricklet.