我找到了一个代码,用Java通过串口与Arduino进行通信,并希望尝试使其工作,以便为项目构思扩展它,但我不断收到此错误

Stable Library

=========================================

Native lib Version = RXTX-2.2-20081207 Cloudhopper Build rxtx.cloudhopper.net

Java lib Version = RXTX-2.1-7

WARNING: RXTX Version mismatch

Jar version = RXTX-2.1-7

native lib Version = RXTX-2.2-20081207 Cloudhopper Build rxtx.cloudhopper.net

Could not find COM port.

Started

我认为这意味着RXTX库存在jar不匹配,但是在本机lib中构建的链接是一个网站不再存在.我不确定如何解决这个问题.如果您认为这是问题,我的代码如下.任何帮助,将不胜感激.

import java.io.OutputStream;

import gnu.io.CommPortIdentifier;

import gnu.io.SerialPort;

import gnu.io.SerialPortEvent;

import gnu.io.SerialPortEventListener;

import java.io.InputStream;

import java.util.Enumeration;

public class AraInterface {

SerialPort serialPort;

/** The port we're normally going to use. */

private static final String PORT_NAMES[] = {

"/dev/tty.usbserial-A9007UX1", // Mac OS X

"/dev/ttyUSB0", // Linux

"COM35", // Windows //shin: ardu com port here

};

private InputStream input;

private OutputStream output;

private static final int TIME_OUT = 2000;

private static final int DATA_RATE = 9600;

public void initialize() {

CommPortIdentifier portId = null;

Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();

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 {

serialPort = (SerialPort) portId.open(this.getClass().getName(),

TIME_OUT);

serialPort.setSerialPortParams(DATA_RATE,

SerialPort.DATABITS_8,

SerialPort.STOPBITS_1,

SerialPort.PARITY_NONE);

input = serialPort.getInputStream();

output = serialPort.getOutputStream();

serialPort.addEventListener((SerialPortEventListener) this);

serialPort.notifyOnDataAvailable(true);

} catch (Exception e) {

System.err.println(e.toString());

}

}

public synchronized void close() {

if (serialPort != null) {

serialPort.removeEventListener();

serialPort.close();

}

}

public synchronized void serialEvent(SerialPortEvent oEvent) {

if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {

try {

int available = input.available();

byte chunk[] = new byte[available];

input.read(chunk, 0, available);

String temp = new String (chunk);

String ref = "Hel";

if(temp.compareTo(ref)==0){

System.out.println("Hello World request received");

}

else{

System.out.println("lala" + temp);

}

} catch (Exception e) {

System.err.println(e.toString());

}

}

}

public static void main(String[] args) throws Exception {

AraInterface main = new AraInterface();

main.initialize();

System.out.println("Started");

}

}

解决方法:

>检查是否已安装库.如果没有,在Ubuntu的情况下,

sudo apt-get install librxtx-java

>如果已安装,

转到安装的路径—在我的案例中是/usr/share/java/RXTXcomm.jar

>如果您使用的是Ubuntu或任何Linux发行版,请从Eclipse构建路径中删除任何下载的rxtx库,并在步骤2中添加已安装的rxtx库的路径.您也可以将其复制到项目中.

>检查您的java库属性(System.getProperty(“java.library.path”))以了解该文件夹.

>将librxtxSerial.so复制到Java库路径 – 在我的例子中

sudo cp -r /usr/lib/jni/librxtxSerial.so /usr/lib / x86_64-linux-gnu

之后再次尝试您的代码.

标签：java,arduino,rxtx

来源： https://codeday.me/bug/20190624/1279509.html