How to use the RXTX Serial and Parallel I/O Libraries in the Java Library for data transmission
How to use the RXTX Serial and Parallel I/O Libraries in the Java Library for data transmission
Overview:
RXTX is an open source Java library that provides cross -platform serial and parallel I/O communication functions.This article will introduce how to use the RXTX library for serial data transmission and attach the Java code example.
step:
1. Install the RXTX library:
-The latest version of the RXTX library, the official website is RXTX.QBANG.ORG.
-Colt the downloaded file and copy the RXTXSerial.dll (Windows) or librxtXserial.so (Linux) library file into the path path of Java.
-In the Java project, import rxtxcomm.jar as the library file dependencies.
2. Import in the RXTX library:
import gnu.io.*;
public class SerialCommunication {
public static void main(String[] args) {
// Writing code here
}
}
3. Open the serial port:
-Ad the available serial port list with the `Com forwardIdIDENTIFIFIFIER` class, and select the port you want to use.The following code example will open the com1 port.
String portName = "COM1";
CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
SerialPort serialPort = (SerialPort) portIdentifier.open("SerialCommunication", 2000);
4. Configure serial communication parameters:
-Set the parameters of serial communication with various methods of the Serialport object.The following code example sets the Potter rate of 9600, the data is 8 bits, and the stop bit is 1 digit.
serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
5. Open the input and output flow:
-Apick the input and output stream with the method of using the serverport object's `GetinputStream () and` GetOutputStream () `method.
InputStream inputStream = serialPort.getInputStream();
OutputStream outputStream = serialPort.getOutputStream();
6. Data transmission:
-In the read and write operation of the input flow and output stream.The following code example reads the data from the input stream and writes the data into the output stream.
try {
int data;
while ((data = inputStream.read()) > -1) {
// Read data from the input stream
System.out.println(data);
// Writing the data into the output stream
outputStream.write(data);
}
} catch (IOException e) {
e.printStackTrace();
}
7. Close port:
-After completing the data transmission, you must close the input and output stream in time, and close the serial port to release resources.
inputStream.close();
outputStream.close();
serialPort.close();
Summarize:
This article introduces how to use RXTX Serial and Parallel I/O Libraries for Java serial data transmission.Through this type of library, you can easily communicate with various external devices through serial ports.Key steps include installing RXTX libraries, importing related class libraries, opening serial ports, configuration communication parameters, opening input and output streams, and data transmission operations.With the RXTX library, you can easily implement data transmission between Java and serial devices.
Please note that in order to correctly use the RXTX library, you need to configure and adjust appropriately according to the actual operating system and hardware platform.
