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JavaFX + java-simple-serial-connector + Arduino" implement simple one way communication from PC run JavaFX to Arduino. This example implement bi-direction sending and receiving between PC and Arduino, using java-simple-serial-connector.
To implement receiving, we have to implement SerialPortEventListener, and add it with serialPort.addEventListener().
package javafx_jssc;
import java.io.UnsupportedEncodingException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.TextField;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
import jssc.SerialPort;
import jssc.SerialPortEvent;
import jssc.SerialPortEventListener;
import jssc.SerialPortException;
import jssc.SerialPortList;
public class JavaFX_jSSC extends Application {
SerialPort serialPort;
ObservableList<String> portList;
ComboBox comboBoxPorts;
TextField textFieldOut, textFieldIn;
Button btnOpenSerial, btnCloseSerial, btnSend;
private void detectPort() {
portList = FXCollections.observableArrayList();
String[] serialPortNames = SerialPortList.getPortNames();
for (String name : serialPortNames) {
System.out.println(name);
portList.add(name);
}
}
@Override
public void start(Stage primaryStage) {
detectPort();
comboBoxPorts = new ComboBox(portList);
textFieldOut = new TextField();
textFieldIn = new TextField();
btnOpenSerial = new Button("Open Serial Port");
btnCloseSerial = new Button("Close Serial Port");
btnSend = new Button("Send");
btnSend.setDisable(true); //default disable before serial port open
btnOpenSerial.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent t) {
closeSerialPort(); //close serial port before open
if(openSerialPort()){
btnSend.setDisable(false);
}else{
btnSend.setDisable(true);
}
}
});
btnCloseSerial.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent t) {
closeSerialPort();
btnSend.setDisable(true);
}
});
btnSend.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent t) {
if(serialPort != null && serialPort.isOpened()){
try {
String stringOut = textFieldOut.getText();
serialPort.writeBytes(stringOut.getBytes());
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_jSSC.class.getName()).log(Level.SEVERE, null, ex);
}
}else{
System.out.println("Something wrong!");
}
}
});
VBox vBox = new VBox();
vBox.getChildren().addAll(
comboBoxPorts,
textFieldOut,
textFieldIn,
btnOpenSerial,
btnCloseSerial,
btnSend);
StackPane root = new StackPane();
root.getChildren().add(vBox);
Scene scene = new Scene(root, 300, 250);
primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent t) {
closeSerialPort();
}
});
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
private boolean openSerialPort() {
boolean success = false;
if (comboBoxPorts.getValue() != null
&& !comboBoxPorts.getValue().toString().isEmpty()) {
try {
serialPort = new SerialPort(comboBoxPorts.getValue().toString());
serialPort.openPort();
serialPort.setParams(
SerialPort.BAUDRATE_9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
serialPort.addEventListener(new MySerialPortEventListener());
success = true;
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_jSSC.class.getName()).log(Level.SEVERE, null, ex);
}
}
return success;
}
private void closeSerialPort() {
if (serialPort != null && serialPort.isOpened()) {
try {
serialPort.closePort();
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_jSSC.class.getName()).log(Level.SEVERE, null, ex);
}
}
serialPort = null;
}
class MySerialPortEventListener implements SerialPortEventListener {
@Override
public void serialEvent(SerialPortEvent serialPortEvent) {
if(serialPortEvent.isRXCHAR()){
try {
int byteCount = serialPortEvent.getEventValue();
byte bufferIn[] = serialPort.readBytes(byteCount);
String stringIn = "";
try {
stringIn = new String(bufferIn, "UTF-8");
} catch (UnsupportedEncodingException ex) {
Logger.getLogger(JavaFX_jSSC.class.getName()).log(Level.SEVERE, null, ex);
}
textFieldIn.setText(stringIn);
} catch (SerialPortException ex) {
Logger.getLogger(JavaFX_jSSC.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
}
Arduino Esplora side, refer to
previous post.
