使用Arduino的串行监视器写入缓冲区上的输出

Question

我想向Arduino的串行监视器发送一些数据，并将其设置为使用它，但是我无法获取它但是我的代码中存在什么问题查收这里是Arduino的代码

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); 
} 
} 

这里是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); 
} 
} 

Answer 1

我只需更改output.println（ “Y”）sovled问题; to output.write（“y”）; 和它的工作像一个chorm 感谢您的回应