Fredrik sterlind

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Using and extending COOJA for sensor network
simulations

• Fredrik Österlind
• Swedish Institute of Computer Science

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TODO

• Create plugin for counting radio packets
• Create and import project directory
• Create simple plugin
• Observer radio medium
• Counting packet intelligence
• Tip 1 Use existing example project_new_plugin
• Tip 2 Use save functionality in COOJA

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Different solutions

• Listen to all radio interfaces
• Listen to the radio medium
• Last tick connection
• Extending connection logger

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Step 1 Create new project

• Configuration file (cooja.config)
• Must tell COOJA about the new pluginse.sics.cooj
  a.GUI.PLUGINS MyNewPlugin
• Create Java sources
• Should be in subfolder java
• Compile with cooja.jar in classpath
• gt javac -cp ../../../dist/cooja.jar .java

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Step 2 Plugin GUI

• A simple Java label will do!
• myLabel new JLabel("No packets discovered
  yet!")
• add(myLabel)

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Step 3 Observe radio medium

• Get notified at radio activity
• // Register as radio medium observer
• Observer radioMediumObserver new Observer()
• public void update(Observable obs, Object obj)
• / TODO Check if new packet /
• mySimulation.getRadioMedium().addRadioMediumObserv
  er(radioMediumObserver)

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Step 4 Detect new packets

• Not all notifications are new transmissions!
• / Increase packet counter /
• RadioConnection newConns myRadioMedium.getLast
  TickConnections()
• if (newConns ! null)
• myCounter newConns.length
• myLabel.setText("Packet count "
  myCounter)

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Done?We just added a new plugin to COOJA!

• To make the new plugin standard in COOJA, update
  external tools paths
• DEFAULT_PROJECTDIRS gt../apps/mrm../examples/pro
  ject_packet_counter