com.phidgets
Class WeightSensorPhidget

java.lang.Object
  com.phidgets.Phidget
      com.phidgets.WeightSensorPhidget

public final class WeightSensorPhidget
extends Phidget

This class represents a Phidget Weight Sensor. All methods to read weight data from the weight sensor are implemented in this class.

The Phidget Weight Sensor is simply an electronic scale with a USB interface. It provides one weight value, in kg.

Constructor Summary

WeightSensorPhidget()

Method Summary

void	addWeightChangeListener(WeightChangeListener l) Adds a weight change listener.
double	getWeight() Returns the sensed weight in kg.
double	getWeightChangeTrigger() Returns the weight change trigger.
void	removeWeightChangeListener(WeightChangeListener l)
void	setWeightChangeTrigger(double newVal) Sets the weight change trigger.

Methods inherited from class com.phidgets.Phidget

addAttachListener, addDetachListener, addErrorListener, close, equals, getDeviceName, getDeviceType, getDeviceVersion, getLibraryVersion, getSerialNumber, getTag, isAttached, open, openAny, removeAttachListener, removeDetachListener, removeErrorListener, setTag, toString, waitForAttachment

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

WeightSensorPhidget

public WeightSensorPhidget()
                    throws PhidgetException

Throws:

PhidgetException

Method Detail

getWeight

public double getWeight()
                 throws PhidgetException

Returns the sensed weight in kg. This weight is in kg (kilograms), but can easily be converted into other units. The accuracy, sesitivity and range depends on the scale and version.

Returns:

The sensed weight

Throws:

PhidgetException - If this Phidget is not opened and attached. See open for information on determining if a device is attached.

setWeightChangeTrigger

public void setWeightChangeTrigger(double newVal)
                            throws PhidgetException

Sets the weight change trigger. This is the ammount by which the sensed weight must change between WeightChangeEvents. By default this is set to 5.

Parameters:

newVal - The new trigger value

Throws:

PhidgetException - If this Phidget is not opened and attached. See open for information on determining if a device is attached.

getWeightChangeTrigger

public double getWeightChangeTrigger()
                              throws PhidgetException

Returns the weight change trigger. This is the ammount by which the sensed weight must change between WeightChangeEvents. By default this is set to 5.

Returns:

The trigger value

Throws:

PhidgetException - If this Phidget is not opened and attached. See open for information on determining if a device is attached.

addWeightChangeListener

public final void addWeightChangeListener(WeightChangeListener l)

Adds a weight change listener. The weight change handler is a method that will be called when the weight has changed by at least the Trigger that has been set.

There is no limit on the number of weight change handlers that can be registered for a particular Phidget.

Parameters:

l - An implemetation of the WeightChangeListener interface

removeWeightChangeListener

public final void removeWeightChangeListener(WeightChangeListener l)