设置串口波特率(有些串口是需要设置才能输出读取)

stty -F /dev/ttyUSB0 raw speed 9600

读取串口信息

cat /dev/ttyUSB0

java代码读取

import gnu.io.*;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;public class SerialCommunicationExample {public static void main(String[] args) {try {// 设置串口波特率String portName = "/dev/ttyUSB0"; // 串口设备名称int baudRate = 9600; // 波特率CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);if (portIdentifier.isCurrentlyOwned()) {System.out.println("Error: Port is currently in use");} else {CommPort commPort = portIdentifier.open(SerialCommunicationExample.class.getName(), 2000);if (commPort instanceof SerialPort) {SerialPort serialPort = (SerialPort) commPort;serialPort.setSerialPortParams(baudRate, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);// 读取串口信息BufferedReader reader = new BufferedReader(new InputStreamReader(serialPort.getInputStream()));String line;while ((line = reader.readLine()) != null) {System.out.println("Received: " + line);}reader.close();serialPort.close();} else {System.out.println("Error: Only serial ports are handled by this example.");}}} catch (NoSuchPortException | PortInUseException | UnsupportedCommOperationException | IOException e) {e.printStackTrace();}}
}