Java command line application for manipulating with Wireless Sensor Network (WSN), collecting data and controlling running experiment on testbed.

Technical documentation for this project is in early stages, this is only short description. There can be some inaccuracies in this text.

Application has been made for specific needs of our laboratory at Masaryk University, thus it contains some very specific features/settings. But it also contains some universal classes which can be useful for others.

Requires modified version of TinyOS Java SDK, see TinyOSJava-2.1.ph4edit repo. In order to build this application you need to install aforementioned package to maven repository so as this application can use it. This can be done by following command:

mvn install:install-file -Dfile=./WSNTinyOS.jar -DgroupId=net -DartifactId=tinyos -Dversion=2.1ph4 -Dpackaging=jar

assuming that built TinyOSJava-2.1.ph4edit is called WSNTinyOS.jar. For this purpose you can also use provided shell script - reinstallMvnTinyos.sh. It takes path to mentioned JAR file as a first argument.

Next you will need new jython. You can obtain it from: http://sourceforge.net/projects/jython/files/jython-dev/2.5.3b1/jython_installer-2.5.3b1.jar/download

mvn install:install-file -Dfile=./jython-2.5.3b1.jar -DgroupId=org.python -DartifactId=jython -Dversion=2.5.3b1 -Dpackaging=jar

Building this application is done by:

mvn package

Also I recommend to clean previous build before another:

mvn clean package

• Spring as dependency injection container.
• Hibernate for DB connection, ORM, JPA 2.0 annotations/logic.
• c3p0 database connection pool.
• Jython for interactive python shell.
• SLF4J for logging.
• RMI for remote forwarder control.

This application provides framework for WSN for server side application. One can easy send messages synchronously or asynchronously, register as packet listener. Level of abstraction is added compared to original TinyOS Java SDK to support connecting/disconnecting to/from nodes without any need to re-register in high level, this maintenance is handled in low layer code.

When application starts from command line it provides Jython shell - python implementation in pure java. One can write python scripts in it and use java classes. Thus one can control application behavior from this shell by starting/stopping experiment, monitor application state, initialize new TinyOS message and send it to node and so on. In short one can interact with WSN testbed interactively.

Message listeners has its own queues which buffers incoming messages not to loose any because of high load. Message sender has queue of messages to send.

With application one can analyze incoming messages from testbed and store results to database easily with defined ORM mapping or to CSV/XML files.

Application contains simple statistical tools to compute statistics such as mean, median, standard deviation, 1st, 3rd quartile, min, max. This is useful for analysis of collected data.

Application can be used as serial forwarder for multiple connected nodes. One can start serial forwarders for example for 200 nodes. This way is easy to communicate with whole testbed via IP network. Packets received on this application uses timestamping features added to TinyOSJava-2.1.ph4edit so client connected to application's serial forwarder has accurate time of message reception directly on serial interface.

One can test throughput of database system with prepared benchmark modules.

Application is compatible with classical PrintF messages, it is possible to log them to the log file and to the database.

Author: Dusan Klinec (ph4r05)