使用RXTX Java库向Arduino发送串行数据
我有一些代码,它不断地从Arduino上读取一行串行数据。我将arduino设置为发送回它读入的任何数据,或者如果没有数据可读取,它将只发送“无数据”。我接收到Java控制台的“无数据”很好,Arduino代码在使用终端时按预期工作。然而,我无法让Java将任何数据发送回arduino,我尝试了各种方法,但没有成功:(理想情况下,另一种用于发送数据的串行事件方法会很好。(接收方法正在工作) 感谢您的帮助,代码如下所示:使用RXTX Java库向Arduino发送串行数据,java,serial-port,arduino,rxtx,Java,Serial Port,Arduino,Rxtx,我有一些代码,它不断地从Arduino上读取一行串行数据。我将arduino设置为发送回它读入的任何数据,或者如果没有数据可读取,它将只发送“无数据”。我接收到Java控制台的“无数据”很好,Arduino代码在使用终端时按预期工作。然而,我无法让Java将任何数据发送回arduino,我尝试了各种方法,但没有成功:(理想情况下,另一种用于发送数据的串行事件方法会很好。(接收方法正在工作) 感谢您的帮助,代码如下所示: public class SerialComm implements Ser
public class SerialComm implements SerialPortEventListener {
SerialPort serialPort;
/** The port we're normally going to use. */
private static final String PORT_NAMES[] = {
"/dev/tty.usbserial-A9007UX1", // Mac OS X
"/dev/ttyACM0", // Raspberry Pi
"/dev/ttyUSB0", // Linux
"COM3", // Windows
};
/**
* A BufferedReader which will be fed by a InputStreamReader
* converting the bytes into characters
* making the displayed results codepage independent
*/
private BufferedReader input;
/** The output stream to the port */
private OutputStream output;
/** Milliseconds to block while waiting for port open */
private static final int TIME_OUT = 2000;
/** Default bits per second for COM port. */
private static final int DATA_RATE = 115200;
public void initialize() {
CommPortIdentifier portId = null;
Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();
//First, Find an instance of serial port as set in PORT_NAMES.
while (portEnum.hasMoreElements()) {
CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
for (String portName : PORT_NAMES) {
if (currPortId.getName().equals(portName)) {
portId = currPortId;
break;
}
}
}
if (portId == null) {
System.out.println("Could not find COM port.");
return;
}
try {
// open serial port, and use class name for the appName.
serialPort = (SerialPort) portId.open(this.getClass().getName(),
TIME_OUT);
// set port parameters
serialPort.setSerialPortParams(DATA_RATE,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
// open the streams
input = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));
output = serialPort.getOutputStream();
// add event listeners
serialPort.addEventListener(this);
serialPort.notifyOnDataAvailable(true);
} catch (Exception e) {
System.err.println(e.toString());
}
}
/**
* This should be called when you stop using the port.
* This will prevent port locking on platforms like Linux.
*/
public synchronized void close() {
if (serialPort != null) {
serialPort.removeEventListener();
serialPort.close();
}
}
/**
* Handle an event on the serial port. Read the data and print it.
*/
public synchronized void serialEvent(SerialPortEvent oEvent) {
if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
try {
String inputLine=input.readLine();
System.out.println(inputLine);
} catch (Exception e) {
System.err.println(e.toString());
}
}
//Trying to implement another serial event for sending data here
}
}将草图上传到Arduino,该草图在序列上打印一些内容,并将其连接到计算机,然后运行java程序。您解决了这个问题吗?