我正在尝试将一些数据发送到arduino的串行监视器，然后使用它开启led但是我无法得到它我的代码中有什么问题请检查它是arduino代码
int led = 12; // LED connected to digital pin 13
int pts = 2; // Powertail Switch 2 connected to digital pin 2
int recv = 0; // byte received on the serial port
void setup() {
// initialize onboard LED (led), Powertail (pts) and serial port
pinMode(led, OUTPUT);
pinMode(pts, OUTPUT);
digitalWrite(led,LOW);
Serial.begin(9600);
}
void loop()
{
// if serial port is available, read incoming bytes
if (Serial.available() > 0) {
recv = Serial.read();
// if 'y' (decimal 121) is received, turn LED/Powertail on
// anything other than 121 is received, turn LED/Powertail off
if (recv == 121){
digitalWrite(led, HIGH);
digitalWrite(pts,LOW);
} else {
digitalWrite(led, LOW);
digitalWrite(pts,HIGH);
}
// confirm values received in serial monitor window
Serial.print("--Arduino received: ");
Serial.println(recv);
}
}
这是java代码
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import com.fazecast.jSerialComm.SerialPort;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import javax.swing.SwingConstants;
public class Connection {
static SerialPort chosenPort;
public static void main(String[] args) throws FileNotFoundException {
// create and configure the window
JFrame window = new JFrame();
window.setTitle("Automatic Car Wash");
window.setSize(1000, 600);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.getContentPane().setLayout(null);
Date DateAndTime = Calendar.getInstance().getTime();
PrintWriter out = new PrintWriter("Incom Record Save.txt");
// create a drop-down box and connect button, then place them at the top of the window
JComboBox<String> portList = new JComboBox<String>();
JButton connectButton = new JButton("Connect");
JPanel topPanel = new JPanel();
topPanel.setBounds(0, 0, 584, 33);
topPanel.add(portList);
topPanel.add(connectButton);
window.getContentPane().add(topPanel);
JLabel stageone = new JLabel("Stage One gif");
stageone.setIcon(new ImageIcon("E:\\thesis\\first stage gif.gif"));
stageone.setBounds(76, 95, 160, 120);
stageone.setVisible(false);
window.getContentPane().add(stageone);
JLabel stageoneimage = new JLabel("Stage One image ");
stageoneimage.setIcon(new ImageIcon("C:\\Users\\DELL\\Desktop\\stagoneimage.jpg"));
stageoneimage.setBounds(76, 95, 160, 120);
window.getContentPane().add(stageoneimage);
JLabel TotalCars = new JLabel("Number of Cars");
TotalCars.setHorizontalAlignment(SwingConstants.CENTER);
TotalCars.setBounds(156, 270, 138, 14);
window.getContentPane().add(TotalCars);
JLabel lblTotalCars = new JLabel("Total Cars=");
lblTotalCars.setHorizontalAlignment(SwingConstants.CENTER);
lblTotalCars.setBounds(104, 270, 81, 14);
window.getContentPane().add(lblTotalCars);
JLabel TotalIncome = new JLabel("0");
TotalIncome.setHorizontalAlignment(SwingConstants.CENTER);
TotalIncome.setBounds(365, 270, 92, 14);
window.getContentPane().add(TotalIncome);
JLabel RS = new JLabel("RS");
RS.setHorizontalAlignment(SwingConstants.CENTER);
RS.setBounds(416, 270, 46, 14);
window.getContentPane().add(RS);
JLabel DateTime = new JLabel("Todays Date And Time");
DateTime.setHorizontalAlignment(SwingConstants.CENTER);
DateTime.setBounds(184, 294, 173, 25);
DateTime.setText(DateAndTime.toString());
window.getContentPane().add(DateTime);
JButton btnSave = new JButton(" Save");
btnSave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
out.close();
}
});
btnSave.setBounds(26, 295, 89, 23);
window.getContentPane().add(btnSave);
JLabel lblTotalIncome = new JLabel("Total Income=");
lblTotalIncome.setHorizontalAlignment(SwingConstants.CENTER);
lblTotalIncome.setBounds(304, 270, 92, 14);
window.getContentPane().add(lblTotalIncome);
JLabel thanks = new JLabel("thanks");
thanks.setHorizontalAlignment(SwingConstants.CENTER);
thanks.setIcon(new ImageIcon("C:\\Users\\DELL\\Desktop\\thanks.gif"));
thanks.setBounds(36, 333, 312, 218);
thanks.setVisible(false);
window.getContentPane().add(thanks);
JLabel lblStageTwoGif = new JLabel("stage two gif");
lblStageTwoGif.setBounds(236, 95, 160, 120);
window.getContentPane().add(lblStageTwoGif);
JLabel stagetwoimage = new JLabel("stage2image");
stagetwoimage.setIcon(new ImageIcon("C:\\Users\\DELL\\Desktop\\stagetwoimage.jpg"));
stagetwoimage.setBounds(236, 95, 160, 120);
window.getContentPane().add(stagetwoimage);
JLabel stage3gif = new JLabel("stage3gif");
stage3gif.setBounds(395, 95, 160, 120);
window.getContentPane().add(stage3gif);
JLabel stage3image = new JLabel("stageimage3");
stage3image.setIcon(new ImageIcon("C:\\Users\\DELL\\Desktop\\stagethree.jpg"));
stage3image.setBounds(395, 95, 160, 120);
window.getContentPane().add(stage3image);
JLabel Stagefourimage = new JLabel("stagefourimage");
Stagefourimage.setIcon(new ImageIcon("C:\\Users\\DELL\\Desktop\\stagefour.jpg"));
Stagefourimage.setBounds(555, 95, 160, 120);
window.getContentPane().add(Stagefourimage);
JLabel Stagefourgif = new JLabel("stagefourgif");
Stagefourgif.setBounds(555, 95, 160, 120);
window.getContentPane().add(Stagefourgif);
JLabel Stagefiveimage = new JLabel("stagefiveimage");
Stagefiveimage.setIcon(new ImageIcon("C:\\Users\\DELL\\Desktop\\stage 5image.jpg"));
Stagefiveimage.setBounds(715, 95, 160, 120);
window.getContentPane().add(Stagefiveimage);
JLabel Stagefivegif = new JLabel("stagefivegif");
Stagefivegif.setBounds(715, 95, 160, 120);
window.getContentPane().add(Stagefivegif);
// populate the drop-down box
SerialPort[] portNames = SerialPort.getCommPorts();
for(int i = 0; i < portNames.length; i++)
portList.addItem(portNames[i].getSystemPortName());
// configure the connect button and use another thread to listen for data
connectButton.addActionListener(new ActionListener(){
@Override public void actionPerformed(ActionEvent arg0) {
if(connectButton.getText().equals("Connect")) {
// attempt to connect to the serial port
chosenPort = SerialPort.getCommPort(portList.getSelectedItem().toString());
chosenPort.setComPortTimeouts(SerialPort.TIMEOUT_SCANNER, 0, 0);
if(chosenPort.openPort()) {
connectButton.setText("Disconnect");
portList.setEnabled(false);
}
Thread thread = new Thread(){
@Override public void run() {
// wait after connecting, so the bootloader can finish
try {Thread.sleep(100); } catch(Exception e) {}
// enter an infinite loop that sends text to the arduino
PrintWriter output = new PrintWriter(chosenPort.getOutputStream());
while(true) {
output.println("y");
output.flush();
try {Thread.sleep(100); } catch(Exception e) {}
}
}
};
thread.start();
// create a new thread that listens for incoming text and populates the graph
Thread thread2 = new Thread(){
@Override public void run() {
int count = 0;
int total_income = 0;
int car_price=300;
Scanner scanner = new Scanner(chosenPort.getInputStream());
while(scanner.hasNextLine()) {
try {
String line = scanner.nextLine();
int number = Integer.parseInt(line);
System.out.println(number);
if(number==1)
{
count++;
stageone.setVisible(true);
stageoneimage.setVisible(false);
total_income=count*car_price;
out.println("Date= "+DateAndTime+" Number of Cars="+count+" Total Income="+total_income);
TotalCars.setText(String.valueOf(count));
TotalIncome.setText(String.valueOf( total_income));
thanks.setVisible(true);
}
} catch(Exception e) {}
}
scanner.close();
}
};
thread2.start();
} else {
// disconnect from the serial port
chosenPort.closePort();
portList.setEnabled(true);
connectButton.setText("Connect");
}
}
});
// show the window
window.setVisible(true);
}
}
答案 0 :(得分：0)
我通过改变output.println（“y”）来解决这个问题; to output.write（“y”）; 它的工作就像一个chorm 谢谢你的回复