This is the description of the Java API bindings for the Color Bricklet 2.0. General information and technical specifications for the Color Bricklet 2.0 are summarized in its hardware description.
An installation guide for the Java API bindings is part of their general description.
The example code below is Public Domain (CC0 1.0).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | import com.tinkerforge.IPConnection;
import com.tinkerforge.BrickletColorV2;
import com.tinkerforge.BrickletColorV2.Color;
public class ExampleSimple {
private static final String HOST = "localhost";
private static final int PORT = 4223;
// Change XYZ to the UID of your Color Bricklet 2.0
private static final String UID = "XYZ";
// Note: To make the example code cleaner we do not handle exceptions. Exceptions
// you might normally want to catch are described in the documentation
public static void main(String args[]) throws Exception {
IPConnection ipcon = new IPConnection(); // Create IP connection
BrickletColorV2 c = new BrickletColorV2(UID, ipcon); // Create device object
ipcon.connect(HOST, PORT); // Connect to brickd
// Don't use device before ipcon is connected
// Get current color
Color color = c.getColor(); // Can throw com.tinkerforge.TimeoutException
System.out.println("Color [R]: " + color.r);
System.out.println("Color [G]: " + color.g);
System.out.println("Color [B]: " + color.b);
System.out.println("Color [C]: " + color.c);
System.out.println("Press key to exit"); System.in.read();
ipcon.disconnect();
}
}
|
Download (ExampleCallback.java)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | import com.tinkerforge.IPConnection;
import com.tinkerforge.BrickletColorV2;
public class ExampleCallback {
private static final String HOST = "localhost";
private static final int PORT = 4223;
// Change XYZ to the UID of your Color Bricklet 2.0
private static final String UID = "XYZ";
// Note: To make the example code cleaner we do not handle exceptions. Exceptions
// you might normally want to catch are described in the documentation
public static void main(String args[]) throws Exception {
IPConnection ipcon = new IPConnection(); // Create IP connection
BrickletColorV2 c = new BrickletColorV2(UID, ipcon); // Create device object
ipcon.connect(HOST, PORT); // Connect to brickd
// Don't use device before ipcon is connected
// Add color listener
c.addColorListener(new BrickletColorV2.ColorListener() {
public void color(int r, int g, int b, int c) {
System.out.println("Color [R]: " + r);
System.out.println("Color [G]: " + g);
System.out.println("Color [B]: " + b);
System.out.println("Color [C]: " + c);
System.out.println("");
}
});
// Set period for color callback to 0.1s (100ms)
c.setColorCallbackConfiguration(100, false);
System.out.println("Press key to exit"); System.in.read();
ipcon.disconnect();
}
}
|
Generally, every method of the Java bindings that returns a value can
throw a TimeoutException
. This exception gets thrown if the
device did not respond. If a cable based connection is used, it is
unlikely that this exception gets thrown (assuming nobody unplugs the
device). However, if a wireless connection is used, timeouts will occur
if the distance to the device gets too big.
Beside the TimeoutException
there is also a NotConnectedException
that
is thrown if a method needs to communicate with the device while the
IP Connection is not connected.
Since Java does not support multiple return values and return by reference is not possible for primitive types, we use small classes that only consist of member variables. The member variables of the returned objects are described in the corresponding method descriptions.
The package for all Brick/Bricklet bindings and the IP Connection is
com.tinkerforge.*
All methods listed below are thread-safe.
BrickletColorV2
(String uid, IPConnection ipcon)¶Parameters: |
|
---|---|
Returns: |
|
Creates an object with the unique device ID uid
:
BrickletColorV2 colorV2 = new BrickletColorV2("YOUR_DEVICE_UID", ipcon);
This object can then be used after the IP Connection is connected.
BrickletColorV2.
getColor
()¶Return Object: |
|
---|
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:
If you want to get the color periodically, it is recommended
to use the ColorListener
listener and set the period with
setColorCallbackConfiguration()
.
BrickletColorV2.
getIlluminance
()¶Returns: |
|
---|
Returns the illuminance affected by the gain and integration time as
set by setConfiguration()
. 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 setConfiguration()
.
If you want to get the value periodically, it is recommended to use the
IlluminanceListener
listener. You can set the listener configuration
with setIlluminanceCallbackConfiguration()
.
BrickletColorV2.
getColorTemperature
()¶Returns: |
|
---|
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 setConfiguration()
.
If you want to get the value periodically, it is recommended to use the
ColorTemperatureListener
listener. You can set the listener configuration
with setColorTemperatureCallbackConfiguration()
.
BrickletColorV2.
setLight
(boolean enable)¶Parameters: |
|
---|
Turns the white LED on the Bricklet on/off.
BrickletColorV2.
getLight
()¶Returns: |
|
---|
Returns the value as set by setLight()
.
BrickletColorV2.
setConfiguration
(int gain, int integrationTime)¶Parameters: |
|
---|
Sets the configuration of the sensor. Gain and integration time can be configured this way.
For configuring the gain:
For configuring the integration time:
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 to get the conversion results.
The following constants are available for this function:
For gain:
For integrationTime:
BrickletColorV2.
getConfiguration
()¶Return Object: |
|
---|
Returns the configuration as set by setConfiguration()
.
The following constants are available for this function:
For gain:
For integrationTime:
BrickletColorV2.
getSPITFPErrorCount
()¶Return Object: |
|
---|
Returns the error count for the communication between Brick and Bricklet.
The errors are divided into
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.
BrickletColorV2.
setStatusLEDConfig
(int config)¶Parameters: |
|
---|
Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets.
You can also turn the LED permanently on/off or show a heartbeat.
If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.
The following constants are available for this function:
For config:
BrickletColorV2.
getStatusLEDConfig
()¶Returns: |
|
---|
Returns the configuration as set by setStatusLEDConfig()
The following constants are available for this function:
For config:
BrickletColorV2.
getChipTemperature
()¶Returns: |
|
---|
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.
BrickletColorV2.
reset
()¶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!
BrickletColorV2.
getIdentity
()¶Return Object: |
|
---|
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.
BrickletColorV2.
setColorCallbackConfiguration
(long period, boolean valueHasToChange)¶Parameters: |
|
---|
The period is the period with which the ColorListener
listener is triggered periodically. A value of 0 turns the listener off.
If the value has to change-parameter is set to true, the listener is only triggered after the value has changed. If the value didn't change within the period, the listener is triggered immediately on change.
If it is set to false, the listener is continuously triggered with the period, independent of the value.
BrickletColorV2.
getColorCallbackConfiguration
()¶Return Object: |
|
---|
Returns the listener configuration as set by
setColorCallbackConfiguration()
.
BrickletColorV2.
setIlluminanceCallbackConfiguration
(long period, boolean valueHasToChange, char option, long min, long max)¶Parameters: |
|
---|
The period is the period with which the IlluminanceListener
listener is triggered
periodically. A value of 0 turns the listener off.
If the value has to change-parameter is set to true, the listener is only triggered after the value has changed. If the value didn't change within the period, the listener is triggered immediately on change.
If it is set to false, the listener is continuously triggered with the period, independent of the value.
It is furthermore possible to constrain the listener with thresholds.
The option-parameter together with min/max sets a threshold for the IlluminanceListener
listener.
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 listener is triggered with the fixed period.
The following constants are available for this function:
For option:
BrickletColorV2.
getIlluminanceCallbackConfiguration
()¶Return Object: |
|
---|
Returns the listener configuration as set by setIlluminanceCallbackConfiguration()
.
The following constants are available for this function:
For option:
BrickletColorV2.
setColorTemperatureCallbackConfiguration
(long period, boolean valueHasToChange, char option, int min, int max)¶Parameters: |
|
---|
The period is the period with which the ColorTemperatureListener
listener is triggered
periodically. A value of 0 turns the listener off.
If the value has to change-parameter is set to true, the listener is only triggered after the value has changed. If the value didn't change within the period, the listener is triggered immediately on change.
If it is set to false, the listener is continuously triggered with the period, independent of the value.
It is furthermore possible to constrain the listener with thresholds.
The option-parameter together with min/max sets a threshold for the ColorTemperatureListener
listener.
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 listener is triggered with the fixed period.
The following constants are available for this function:
For option:
BrickletColorV2.
getColorTemperatureCallbackConfiguration
()¶Return Object: |
|
---|
Returns the listener configuration as set by setColorTemperatureCallbackConfiguration()
.
The following constants are available for this function:
For option:
Listeners can be registered to receive
time critical or recurring data from the device. The registration is done
with add*Listener()
functions of the device object.
The parameter is a listener class object, for example:
device.addExampleListener(new BrickletColorV2.ExampleListener() {
public void property(int value) {
System.out.println("Value: " + value);
}
});
The available listener classes with inherent methods to be overwritten
are described below. It is possible to add several listeners and
to remove them with the corresponding remove*Listener()
function.
Note
Using listeners 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.
BrickletColorV2.
ColorListener
()¶This listener can be added with the addColorListener()
function.
An added listener can be removed with the removeColorListener()
function.
color
(int r, int g, int b, int c)Parameters: |
|
---|
This listener is triggered periodically with the period that is set by
setColorCallbackConfiguration()
. The parameter is the color
of the sensor as RGBC.
The ColorListener
listener is only triggered if the color has changed since the
last triggering.
BrickletColorV2.
IlluminanceListener
()¶This listener can be added with the addIlluminanceListener()
function.
An added listener can be removed with the removeIlluminanceListener()
function.
illuminance
(long illuminance)Parameters: |
|
---|
This listener is triggered periodically according to the configuration set by
setIlluminanceCallbackConfiguration()
.
The parameter is the same as getIlluminance()
.
BrickletColorV2.
ColorTemperatureListener
()¶This listener can be added with the addColorTemperatureListener()
function.
An added listener can be removed with the removeColorTemperatureListener()
function.
colorTemperature
(int colorTemperature)Parameters: |
|
---|
This listener is triggered periodically according to the configuration set by
setColorTemperatureCallbackConfiguration()
.
The parameter is the same as getColorTemperature()
.
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.
BrickletColorV2.
getAPIVersion
()¶Return Object: |
|
---|
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.
BrickletColorV2.
getResponseExpected
(byte functionId)¶Parameters: |
|
---|---|
Returns: |
|
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 listener 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 functionId:
BrickletColorV2.
setResponseExpected
(byte functionId, boolean responseExpected)¶Parameters: |
|
---|
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 listener 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 functionId:
BrickletColorV2.
setResponseExpectedAll
(boolean responseExpected)¶Parameters: |
|
---|
Changes the response expected flag for all setter and listener configuration functions of this device at once.
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.
BrickletColorV2.
setBootloaderMode
(int mode)¶Parameters: |
|
---|---|
Returns: |
|
Sets the bootloader mode and returns the status after the requested mode change was instigated.
You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct.
This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
The following constants are available for this function:
For mode:
For status:
BrickletColorV2.
getBootloaderMode
()¶Returns: |
|
---|
Returns the current bootloader mode, see setBootloaderMode()
.
The following constants are available for this function:
For mode:
BrickletColorV2.
setWriteFirmwarePointer
(long pointer)¶Parameters: |
|
---|
Sets the firmware pointer for writeFirmware()
. The pointer has
to be increased by chunks of size 64. The data is written to flash
every 4 chunks (which equals to one page of size 256).
This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
BrickletColorV2.
writeFirmware
(int[] data)¶Parameters: |
|
---|---|
Returns: |
|
Writes 64 Bytes of firmware at the position as written by
setWriteFirmwarePointer()
before. The firmware is written
to flash every 4 chunks.
You can only write firmware in bootloader mode.
This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
BrickletColorV2.
writeUID
(long uid)¶Parameters: |
|
---|
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.
BrickletColorV2.
readUID
()¶Returns: |
|
---|
Returns the current UID as an integer. Encode as Base58 to get the usual string version.
BrickletColorV2.
DEVICE_IDENTIFIER
¶This constant is used to identify a Color Bricklet 2.0.
The getIdentity()
function and the
IPConnection.EnumerateListener
listener of the IP Connection have a deviceIdentifier
parameter to specify
the Brick's or Bricklet's type.
BrickletColorV2.
DEVICE_DISPLAY_NAME
¶This constant represents the human readable name of a Color Bricklet 2.0.