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The purpose of this article is to share with you about the function of Java in controlling the Pi4J of raspberry pie GPIO. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Pi4J (http://pi4j.com/) is a Java library specially used to control raspberry pie GPIO port and communication. It has the following functions:

Export & unexport GPIO pins

Configure GPIO pin direction

Configure GPIO pin edge detection

Control/write GPIO pin states

Pulse GPIO pin state

Read GPIO pin states

Listen for GPIO pin state changes (interrupt-based; not polling)

Automatically set GPIO states on program termination (GPIO shutdown)

Triggers for automation based on pin state changes

Send & receive data via RS232 serial communication

I2C Communication

SPI Communication

Extensible GPIO Provider interface to add GPIO capacity via expansion boards

Access system information and network information from the Raspberry Pi

Wrapper classes for direct access to WiringPi Library from Java

Downloads, novice help, and API documents can all be found on the official website.

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