Overview

Pi4J Version 0.0.5 is now released and it has been a stable build for quite some time.  Users of previous versions are encouraged to upgrade to this latest build.  This release includes a number of bug fixes (see below), new features, and added support for add-on accessory boards and GPIO expander chips.  This version also introduces a component abstraction layer where interfaces are defined for components such as Relays, Lights, Switches, and LCD displays.     

Documentation and examples can be found at the Pi4J Website:
http://pi4j.com/

Pi4J downloads are available here:
http://pi4j.com/download.html

This version is also available at Maven Central:  

Fixed/resolved issues are included via the link below:

Release notes are included in the readme:

• Added support for PCF8574 GpioProvider
• Added sample code for using PCF8574 GpioProvider
• Fixed issue where hard-float ABI was not detected properly when using Oracle JDK 8 early access edition.https://github.com/Pi4J/pi4j/issues/26
• Added support for Motor and Stepper motor component interfaces.
• Added GPIO based stepper motor implementation and sample program.
• Added support for Motion sensor component interface.
• Added GPIO based motion sensor implementation.
• Added LCD component interface
• Added GPIO based 4/8 bit LCD display component implementation and sample program.
• Added GPIO based 4/8 bit LCD WiringPi example program
• Added support for a GpioController.shutdown() method to cleanup terminate all Pi4J threads and executors.https://github.com/Pi4J/pi4j/issues/9
• Added support for a user-definable ExecutorServiceFactory to allow user program to provide the implementation for executor service instances and managed thread pools.
  https://github.com/Pi4J/pi4j/issues/10
• Fixed 'java.util.concurrent.RejectedExecutionException' issue where there were not enough default thread in the pool for concurrent tasks. https://github.com/Pi4J/pi4j/issues/31
• Fixed issue where SerialDataMonitorThread was not shutting down on program exit. https://github.com/Pi4J/pi4j/issues/33
• Fixed issue where hard-float ABI was not detected properly when using Oracle JDK 8 early access edition.https://github.com/Pi4J/pi4j/issues/26
• Added support for exceptions on serial port access methods. https://github.com/Pi4J/pi4j/issues/8
• Fixed issue where process streams were not being closed properly https://github.com/Pi4J/pi4j/issues/35
• Fixed issue where serial.write(byte[]) was throwing java.lang.StringIndexOutOfBoundsExceptionhttps://github.com/Pi4J/pi4j/issues/37
• Added additional system information API methods to access memory, frequency, CPU temperature, voltage, and board model data.https://github.com/Pi4J/pi4j/issues/30
• Fixed MCP23008 and MCP23017 getState() return values
  
• Added support for MCP23S17 GpioProvider
• Added support for Pi-Face GpioProvider
• Added support for Pi-Face Device Interface
• Added MCP23S17GpioExample sample code
  
• Added PiFaceExample sample code
• Added WiringPiSPIExample sample code
  
• Added LED component interface and GpioLEDCompoment impl
  
• Added GpioSwitchCompoment impl

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