public static void main(String args[]) throws InterruptedException {
// !! ATTENTION !!
// By default, the serial port is configured as a console port
// for interacting with the Linux OS shell. If you want to use
// the serial port in a software program, you must disable the
// OS from using this port. Please see this blog article by
// Clayton Smith for step-by-step instructions on how to disable
// the OS console for this port:
// http://www.irrational.net/2012/04/19/using-the-raspberry-pis-serial-port/
System.out.println("<--Pi4J--> Serial Communication Example ... started.");
System.out.println(" ... connect using settings: 38400, N, 8, 1.");
System.out.println(" ... data received on serial port should be displayed below.");
// create an instance of the serial communications class
final Serial serial = SerialFactory.createInstance();
// create and register the serial data listener
serial.addListener(
new SerialDataListener() {
@Override
public void dataReceived(SerialDataEvent event) {
// print out the data received to the console
System.out.print(event.getData());
}
});
try {
// open the default serial port provided on the GPIO header
serial.open(Serial.DEFAULT_COM_PORT, 38400);
// continuous loop to keep the program running until the user terminates the program
for (; ; ) {
try {
// write a formatted string to the serial transmit buffer
serial.write("CURRENT TIME: %s", new Date().toString());
// write a individual bytes to the serial transmit buffer
serial.write((byte) 13);
serial.write((byte) 10);
// write a simple string to the serial transmit buffer
serial.write("Second Line");
// write a individual characters to the serial transmit buffer
serial.write('\r');
serial.write('\n');
// write a string terminating with CR+LF to the serial transmit buffer
serial.writeln("Third Line");
} catch (IllegalStateException ex) {
ex.printStackTrace();
}
// wait 1 second before continuing
Thread.sleep(1000);
}
} catch (SerialPortException ex) {
System.out.println(" ==>> SERIAL SETUP FAILED : " + ex.getMessage());
return;
}
}
public Serial getSerialConnection(String port, int baudRate) {
serial = SerialFactory.createInstance();
serial.open(port, baudRate);
return serial;
}