- Rxtx Example
- Java Rxtx Library Download
- Java Rxtx Download Software
- Java Rxtx Download Windows 10
- Rxtx Java Library
Download this project as a.zip file Download this project as a tar.gz file Download this library as a.jar file. It is meant as an alternative to RxTx and the (deprecated) Java Communications API, with increased ease-of-use, an enhanced support for timeouts, and the ability to open multiple ports simultaneously. Installation Instructions for RXTX. The JControl/IDE needs a JAVA Communication API to communicate with a JControl device via the serial line (RS232). We recommend Trent Jarvi's RXTX package or the JAVA Communication API from Sun Microsystems.
jRxTx is a Java serial communication library licensed under theLGPLv2.1 or later + linking exception. It can be used to communicateusing well known UART-based serial protocols such as RS-232, RS-422and RS-485. The goal of jRxTx is to provide a lightweight, intuitiveand well documented API.
jRxTx wraps the popular RXTX library for whichdevelopment has been discontinued. jRxTx provides two kinds of APIs:1) the original RXTX API and 2) a new improved API.
Original RXTX API
jRxTx can be used as a drop-in replacement for RXTX. The wrapped RXTXhas some advantages compared to the last RXTX release (version2.2pre2):
It includes several bug fixes that do NOT change its API though
The jar file is an OSGi Bundle
The jar file is published onmavencentral.
The Java build system is based on Gradle. This way it is easy to addthe native libs to the jar.
Find the Javadoc of the most current release here:https://openmuc.github.io/jrxtx/javadoc/index.html.
New jRxTx API
In addition to the original RXTX API jRxTx provides a new API with thefollowing advantages:
The InputStream implementation provided by the original RXTX violatesthe contract of the general java.io.InputStream interface. It has thefollowing two problems:
A timeout does not throw an exception but instead returns -1. Butaccording to the InputStream interface -1 should only be returned ifthe stream is closed (i.e. the end of stream is reached).
A thread blocking in InputStream.read() cannot be interrupted byclosing the associated serial port. Trying to close the serial portwhile another thread is blocking in read() causes the close()function to block as well.
jRxTx provides an InputStream implementation that conforms to thejava.io.InputStream interface and behaves very similarly to the streamprovided by java.net.Socket used for IP communication.
The event listener available in RXTX was removed in jRxTx because itis not needed for data stream reading.
Java and Native Parts
jRxTx consists of a Java library and a native library written inC. The Java library calls the native library through JNI. The Javalibrary (jrxtx-<version>.jar) is published onmavencentral. As published on maven central the Java jar file does notinclude the native library.
While the Java library is platform independent, the native part ofjRxTx needs to be compiled separately for different processorarchitectures and operating systems. Because of the large variety ofplatforms jRxTx does not ship with any precompiled native libs.
The jRxTx java library is compatible with the original RXTX nativelibrary. Thus you can also use the old RXTX native library or thenative library of other RXTX compatible projects such as NRJavaSerial.
You can install the native library so that the Java virtual machinecan find it.
You can rebuild the jrxtx jar file to include the native library ofyour choice.
The Java library first searches a native library inside the jarfile. If no compatible lib can be found it tries to load the libaryfrom the java.library.path (e.g. /usr/lib/jni).
Installation
Rxtx Example
Linux
The jRxTx native library is compatible to the RXTX nativelibrary. Therefore on Debian based distributions all you have to do isinstall the package ‘librxtx-java’:
This will install the correct native library in/usr/lib/jni. Sometimes you might have to add a system property sothat the JVM finds it: -Djava.library.path=/usr/lib/jni .
The serial ports /dev/tty* are only accessible to members belonging togroups dialout and tty. You therefore have to add your user to thosegroups. E.g. using:
Afterwards you have to log out and log back in in order for the groupchanges to become active.
Windows
Java Rxtx Library Download
On Windows you need to copy the native library of RXTX for yourspecific system to the folder that is in the java.libary.path. Tofigure out the actual Java library path in your system, you can writea Java program that prints System.getProperty(‘java.library.path’).
You can get the native library either from the last official RXTXdistributionrxtx-2.2pre2-bins.zipor you can compile it on your own from the source code.
Compile jRxTx
Linux
Java Rxtx Download Software
To compile the jRxTx Java library run the following command:
The resulting jar can be found in build/libs.
Java Rxtx Download Windows 10
To rebuild the native library on Linux enter the folder native. Then run:
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The compiled library (librxtxSerial.so) can be found in the .libs/ folder.
Once you have compiled the native library you install it so that theJVM can find and load it. Alternatively you can compile the jar withthe native lib included:
Rxtx Java Library
This will create the jar file and include any librxtxSerial.so/.dllfile found in the native folder. A jar file created this way canload the native library from the jar.