java - 使用java将数据从PC发送到蓝牙芯片BlueSMiRF

Question

我想将笔记本电脑中蓝牙设备的数据发送到 BlueSMiRF 蓝牙芯片。我以前从未处理过蓝牙编程，所以我需要有关如何开始和使用什么的指导。我正在研究 java，但如果有更好的选择，我会研究它。

Answer 1

这是一篇旧文章，但我最近在 arduino 上设置蓝牙模块并将其与在 Ubuntu 上运行的 Java 程序连接。所以让我分享一些我觉得有帮助的链接。

默认情况下，BlueSMiRF 蓝牙模块工作在 SPP（串行端口协议）模式。您可以使用新的 SoftwareSerial 库来编写用于蓝牙通信的 arduino 代码。该库允许您通过蓝牙通过串行端口发送和接收数据。http://arduino.cc/en/Reference/SoftwareSerial有很多示例可以帮助您入门。

对于在计算机上运行的 Java 程序，您可以使用 RXTX 库或 java.comm 库。这是一个包含使用 RXTX 库的各种示例的链接：http ://rxtx.qbang.org/wiki/index.php/Examples 。使用 RXTX 库，您可以通过串行端口发送和接收数据。

使用RXTX库通过串口发送数据的java代码：（我没有测试过）

import gnu.io.CommPort;
import gnu.io.CommPortIdentifier;
import gnu.io.SerialPort;

import java.io.FileDescriptor;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class TwoWaySerialComm
{
    public TwoWaySerialComm()
    {
    super();
    }

    void connect ( String portName ) throws Exception
    {
    CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
    if ( portIdentifier.isCurrentlyOwned() )
    {
        System.out.println("Error: Port is currently in use");
    }
    else
    {
        CommPort commPort = portIdentifier.open(this.getClass().getName(),2000);

        if ( commPort instanceof SerialPort )
        {
            SerialPort serialPort = (SerialPort) commPort;
            serialPort.setSerialPortParams(57600,SerialPort.DATABITS_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);

            //InputStream in = serialPort.getInputStream();
            OutputStream out = serialPort.getOutputStream();

            //(new Thread(new SerialReader(in))).start();
            (new Thread(new SerialWriter(out))).start();

        }
        else
        {
            System.out.println("Error: Only serial ports are handled by this example.");
        }
    }     
    }

    /** */
    /*public static class SerialReader implements Runnable 
    {
    InputStream in;

    public SerialReader ( InputStream in )
    {
        this.in = in;
    }

    public void run ()
    {
        byte[] buffer = new byte[1024];
        int len = -1;
        try
        {
            while ( ( len = this.in.read(buffer)) > -1 )
            {
                System.out.print(new String(buffer,0,len));
            }
        }
        catch ( IOException e )
        {
            e.printStackTrace();
        }            
    }
    }*/

    /** */
    public static class SerialWriter implements Runnable 
    {
    OutputStream out;

    public SerialWriter ( OutputStream out )
    {
        this.out = out;
    }

    public void run ()
    {
        try
        {                
            int c = 0;
            while ( ( c = System.in.read()) > -1 )
            {
                this.out.write(c);
            }                
        }
        catch ( IOException e )
        {
            e.printStackTrace();
        }            
    }
    }

    public static void main ( String[] args )
    {
    try
    {
        (new TwoWaySerialComm()).connect("COM3");
    }
    catch ( Exception e )
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    }
}

用于接收数据的相应arduino代码（再次未经测试）：

#include <SoftwareSerial.h>  

int bluetoothTx = 2;  // TX-O pin of bluetooth mate, Arduino D2
int bluetoothRx = 3;  // RX-I pin of bluetooth mate, Arduino D3

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup()
{
  Serial.begin(9600);  // Begin the serial monitor at 9600bps
  bluetooth.begin(115200);  // The Bluetooth Mate defaults to 115200bps
  bluetooth.print("$$$");  // Enter command mode
  delay(100);  // Short delay, wait for the Mate to send back CMD
  bluetooth.println("U,9600,N");  // Temporarily Change the baudrate to 9600, no parity
  // 115200 can be too fast at times for NewSoftSerial to relay the data reliably
  bluetooth.begin(9600);  // Start bluetooth serial at 9600
}

void loop()
{
  if(bluetooth.available())  // If the bluetooth sent any characters
  {
    // Send any characters the bluetooth prints to the serial monitor
    Serial.print((char)bluetooth.read());  
  }
  /*if(Serial.available())  // If stuff was typed in the serial monitor
  {
    // Send any characters the Serial monitor prints to the bluetooth
    bluetooth.print((char)Serial.read());
  }*/

}