JavaScript - Thermocouple Bricklet¶

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 Thermocouple Bricklet

var ipcon = new Tinkerforge.IPConnection(); // Create IP connection
var t = new Tinkerforge.BrickletThermocouple(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 temperature
        t.getTemperature(
            function (temperature) {
                console.log('Temperature: ' + temperature/100.0 + ' °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 Thermocouple Bricklet

var ipcon = new Tinkerforge.IPConnection(); // Create IP connection
var t = new Tinkerforge.BrickletThermocouple(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 temperature callback to 1s (1000ms)
        // Note: The temperature callback is only called every second
        //       if the temperature has changed since the last call!
        t.setTemperatureCallbackPeriod(1000);
    }
);

// Register temperature callback
t.on(Tinkerforge.BrickletThermocouple.CALLBACK_TEMPERATURE,
    // Callback function for temperature callback
    function (temperature) {
        console.log('Temperature: ' + temperature/100.0 + ' °C');
    }
);

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 Thermocouple Bricklet

var ipcon = new Tinkerforge.IPConnection(); // Create IP connection
var t = new Tinkerforge.BrickletThermocouple(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)
        t.setDebouncePeriod(10000);

        // Configure threshold for temperature "greater than 30 °C"
        t.setTemperatureCallbackThreshold('>', 30*100, 0);
    }
);

// Register temperature reached callback
t.on(Tinkerforge.BrickletThermocouple.CALLBACK_TEMPERATURE_REACHED,
    // Callback function for temperature reached callback
    function (temperature) {
        console.log('Temperature: ' + temperature/100.0 + ' °C');
    }
);

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>Thermocouple 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 t = new Tinkerforge.BrickletThermocouple(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 temperature
                        t.getTemperature(
                            function (temperature) {
                                textArea.value += 'Temperature: ' + temperature/100.0 + ' °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>Thermocouple 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 t = new Tinkerforge.BrickletThermocouple(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 temperature callback to 1s (1000ms)
                        // Note: The temperature callback is only called every second
                        //       if the temperature has changed since the last call!
                        t.setTemperatureCallbackPeriod(1000);
                    }
                );

                // Register temperature callback
                t.on(Tinkerforge.BrickletThermocouple.CALLBACK_TEMPERATURE,
                    // Callback function for temperature callback
                    function (temperature) {
                        textArea.value += 'Temperature: ' + temperature/100.0 + ' °C\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>Thermocouple 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 t = new Tinkerforge.BrickletThermocouple(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)
                        t.setDebouncePeriod(10000);

                        // Configure threshold for temperature "greater than 30 °C"
                        t.setTemperatureCallbackThreshold('>', 30*100, 0);
                    }
                );

                // Register temperature reached callback
                t.on(Tinkerforge.BrickletThermocouple.CALLBACK_TEMPERATURE_REACHED,
                    // Callback function for temperature reached callback
                    function (temperature) {
                        textArea.value += 'Temperature: ' + temperature/100.0 + ' °C\n';
                        textArea.scrollTop = textArea.scrollHeight;
                    }
                );
            }
        </script>
    </body>
</html>

Basic Functions¶

new BrickletThermocouple(uid, ipcon)¶

Parameters:	uid – Type: string ipcon – Type: IPConnection
Returns:	thermocouple – Type: BrickletThermocouple

Creates an object with the unique device ID uid:

var thermocouple = new BrickletThermocouple("YOUR_DEVICE_UID", ipcon);

This object can then be used after the IP Connection is connected.

BrickletThermocouple.getTemperature([returnCallback][, errorCallback])¶

Callback Parameters:	temperature – Type: int, Unit: 1/100 °C, Range: [-21000 to 180000]
Returns:	undefined

Returns the temperature of the thermocouple.

If you want to get the temperature periodically, it is recommended to use the CALLBACK_TEMPERATURE callback and set the period with setTemperatureCallbackPeriod().

Advanced Functions¶

BrickletThermocouple.setConfiguration(averaging, thermocoupleType, filter[, returnCallback][, errorCallback])¶

Parameters:	averaging – Type: int, Range: See constants, Default: 16 thermocoupleType – Type: int, Range: See constants, Default: 3 filter – Type: int, Range: See constants, Default: 0
Callback Parameters:	undefined
Returns:	undefined

You can configure averaging size, thermocouple type and frequency filtering.

Available averaging sizes are 1, 2, 4, 8 and 16 samples.

As thermocouple type you can use B, E, J, K, N, R, S and T. If you have a different thermocouple or a custom thermocouple you can also use G8 and G32. With these types the returned value will not be in °C/100, it will be calculated by the following formulas:

• G8: value = 8 * 1.6 * 2^17 * Vin
• G32: value = 32 * 1.6 * 2^17 * Vin

where Vin is the thermocouple input voltage.

The frequency filter can be either configured to 50Hz or to 60Hz. You should configure it according to your utility frequency.

The conversion time depends on the averaging and filter configuration, it can be calculated as follows:

• 60Hz: time = 82 + (samples - 1) * 16.67
• 50Hz: time = 98 + (samples - 1) * 20

The following constants are available for this function:

For averaging:

• BrickletThermocouple.AVERAGING_1 = 1
• BrickletThermocouple.AVERAGING_2 = 2
• BrickletThermocouple.AVERAGING_4 = 4
• BrickletThermocouple.AVERAGING_8 = 8
• BrickletThermocouple.AVERAGING_16 = 16

For thermocouple_type:

• BrickletThermocouple.TYPE_B = 0
• BrickletThermocouple.TYPE_E = 1
• BrickletThermocouple.TYPE_J = 2
• BrickletThermocouple.TYPE_K = 3
• BrickletThermocouple.TYPE_N = 4
• BrickletThermocouple.TYPE_R = 5
• BrickletThermocouple.TYPE_S = 6
• BrickletThermocouple.TYPE_T = 7
• BrickletThermocouple.TYPE_G8 = 8
• BrickletThermocouple.TYPE_G32 = 9

For filter:

• BrickletThermocouple.FILTER_OPTION_50HZ = 0
• BrickletThermocouple.FILTER_OPTION_60HZ = 1

BrickletThermocouple.getConfiguration([returnCallback][, errorCallback])¶

Callback Parameters:	averaging – Type: int, Range: See constants, Default: 16 thermocoupleType – Type: int, Range: See constants, Default: 3 filter – Type: int, Range: See constants, Default: 0
Returns:	undefined

Returns the configuration as set by setConfiguration().

The following constants are available for this function:

For averaging:

• BrickletThermocouple.AVERAGING_1 = 1
• BrickletThermocouple.AVERAGING_2 = 2
• BrickletThermocouple.AVERAGING_4 = 4
• BrickletThermocouple.AVERAGING_8 = 8
• BrickletThermocouple.AVERAGING_16 = 16

For thermocouple_type:

• BrickletThermocouple.TYPE_B = 0
• BrickletThermocouple.TYPE_E = 1
• BrickletThermocouple.TYPE_J = 2
• BrickletThermocouple.TYPE_K = 3
• BrickletThermocouple.TYPE_N = 4
• BrickletThermocouple.TYPE_R = 5
• BrickletThermocouple.TYPE_S = 6
• BrickletThermocouple.TYPE_T = 7
• BrickletThermocouple.TYPE_G8 = 8
• BrickletThermocouple.TYPE_G32 = 9

For filter:

• BrickletThermocouple.FILTER_OPTION_50HZ = 0
• BrickletThermocouple.FILTER_OPTION_60HZ = 1

BrickletThermocouple.getErrorState([returnCallback][, errorCallback])¶

Callback Parameters:	overUnder – Type: boolean openCircuit – Type: boolean
Returns:	undefined

Returns the current error state. There are two possible errors:

• Over/Under Voltage and
• Open Circuit.

Over/Under Voltage happens for voltages below 0V or above 3.3V. In this case it is very likely that your thermocouple is defective. An Open Circuit error indicates that there is no thermocouple connected.

You can use the CALLBACK_ERROR_STATE callback to automatically get triggered when the error state changes.

BrickletThermocouple.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', '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). A Bricklet connected to an Isolator Bricklet is always at 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¶

BrickletThermocouple.on(callback_id, function[, errorCallback])¶

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.

BrickletThermocouple.setTemperatureCallbackPeriod(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_TEMPERATURE callback is triggered periodically. A value of 0 turns the callback off.

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

BrickletThermocouple.getTemperatureCallbackPeriod([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 setTemperatureCallbackPeriod().

BrickletThermocouple.setTemperatureCallbackThreshold(option, min, max[, returnCallback][, errorCallback])¶

Parameters:	option – Type: char, Range: See constants, Default: 'x' min – Type: int, Unit: 1/100 °C, Range: [-231 to 231 - 1], Default: 0 max – Type: int, Unit: 1/100 °C, Range: [-231 to 231 - 1], Default: 0
Callback Parameters:	undefined
Returns:	undefined

Sets the thresholds for the CALLBACK_TEMPERATURE_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:

• BrickletThermocouple.THRESHOLD_OPTION_OFF = 'x'
• BrickletThermocouple.THRESHOLD_OPTION_OUTSIDE = 'o'
• BrickletThermocouple.THRESHOLD_OPTION_INSIDE = 'i'
• BrickletThermocouple.THRESHOLD_OPTION_SMALLER = '<'
• BrickletThermocouple.THRESHOLD_OPTION_GREATER = '>'

BrickletThermocouple.getTemperatureCallbackThreshold([returnCallback][, errorCallback])¶

Callback Parameters:	option – Type: char, Range: See constants, Default: 'x' min – Type: int, Unit: 1/100 °C, Range: [-231 to 231 - 1], Default: 0 max – Type: int, Unit: 1/100 °C, Range: [-231 to 231 - 1], Default: 0
Returns:	undefined

Returns the threshold as set by setTemperatureCallbackThreshold().

The following constants are available for this function:

For option:

• BrickletThermocouple.THRESHOLD_OPTION_OFF = 'x'
• BrickletThermocouple.THRESHOLD_OPTION_OUTSIDE = 'o'
• BrickletThermocouple.THRESHOLD_OPTION_INSIDE = 'i'
• BrickletThermocouple.THRESHOLD_OPTION_SMALLER = '<'
• BrickletThermocouple.THRESHOLD_OPTION_GREATER = '>'

BrickletThermocouple.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

• CALLBACK_TEMPERATURE_REACHED

is triggered, if the threshold

• setTemperatureCallbackThreshold()

keeps being reached.

BrickletThermocouple.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().

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:

thermocouple.on(BrickletThermocouple.CALLBACK_EXAMPLE,
    function (param) {
        console.log(param);
    }
);

The available constants with inherent number and type of parameters are described below.

BrickletThermocouple.CALLBACK_TEMPERATURE¶

Callback Parameters:	temperature – Type: int, Unit: 1/100 °C, Range: [-21000 to 180000]

This callback is triggered periodically with the period that is set by setTemperatureCallbackPeriod(). The parameter is the temperature of the thermocouple.

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

BrickletThermocouple.CALLBACK_TEMPERATURE_REACHED¶

Callback Parameters:	temperature – Type: int, Unit: 1/100 °C, Range: [-21000 to 180000]

This callback is triggered when the threshold as set by setTemperatureCallbackThreshold() is reached. The parameter is the temperature of the thermocouple.

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

BrickletThermocouple.CALLBACK_ERROR_STATE¶

Callback Parameters:	overUnder – Type: boolean openCircuit – Type: boolean

This Callback is triggered every time the error state changes (see getErrorState()).

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.

BrickletThermocouple.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.

BrickletThermocouple.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 sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For function_id:

• BrickletThermocouple.FUNCTION_SET_TEMPERATURE_CALLBACK_PERIOD = 2
• BrickletThermocouple.FUNCTION_SET_TEMPERATURE_CALLBACK_THRESHOLD = 4
• BrickletThermocouple.FUNCTION_SET_DEBOUNCE_PERIOD = 6
• BrickletThermocouple.FUNCTION_SET_CONFIGURATION = 10

BrickletThermocouple.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 sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For function_id:

• BrickletThermocouple.FUNCTION_SET_TEMPERATURE_CALLBACK_PERIOD = 2
• BrickletThermocouple.FUNCTION_SET_TEMPERATURE_CALLBACK_THRESHOLD = 4
• BrickletThermocouple.FUNCTION_SET_DEBOUNCE_PERIOD = 6
• BrickletThermocouple.FUNCTION_SET_CONFIGURATION = 10

BrickletThermocouple.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¶

BrickletThermocouple.DEVICE_IDENTIFIER¶

This constant is used to identify a Thermocouple 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.

BrickletThermocouple.DEVICE_DISPLAY_NAME¶

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