Fredrik sterlind

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Using COOJA for Contiki development

• Fredrik Österlind
• Swedish Institute of Computer Science

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Contiki OS Java Simulator

• Simulator for the Contiki OS
• Java-based, but simulates Contiki applications
• Support cross-level simulation
• Todays focus using COOJA
• Questions/interruptions/feedback appreciated

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CoOJa
Cooya Look at me! (Jamaican broken english)

• Included with Contiki
• Active development for 1½ years
• Compared to Contiki Netsim
• Heavier
• More powerful
• (More installation problems)
• Uses external programs such as make, gcc, grep...

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Cross-level simulation

• Simulating motes at different abstraction
  levels.
• Application (Java)
• Effective
• Easier to implement
• OS
• Deployable code
• Emulated
• Enables low-level driver development

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Workshop COOJA objectives

• Monday
• Using COOJA
• Tuesday
• Extending COOJA

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TODO (before lunch)

• Installation/Startup
• Compiling code from within COOJA
• Create simulations
• Basic concepts in COOJA
• Using plugins to interact with motes
• Adding project directories

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Getting started...

• Need Java and Ant
• contiki-2.x/tools/coojagt ant run
• Start COOJA
• Compilation problems
• Use JNI tests to configure COOJA

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Design

• Mote type represents the simulated software(and
  hardware)

Mote
Mote
Mote type
GUI
Mote
Mote type
Simulation
Mote
Mote type
Mote
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Contiki applications

• Scans for applications to simulate
• A few test applications available
  in contiki-2.x/platform/cooja
• Applications are compiled the usual way gt make
  testcooja TARGETcooja .....
• Create a Contiki mote type

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Simulating what?

• COOJA uses glue drivers to communicate with
  Contik
• Corresponding parts in Java and Contiki COOJA
  platform

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Plugins and project directories

• Main way to interact with simulations and motes
• Plugin argument is
• Simulator
• Simulation
• Mote
• COOJA needs more plugins )

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A few plugins
Mote Interface Viewer
Event Breaker
Log Listener
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Interacting with the motes

• Test simulated applications
• Via plugins (and interfaces)
• Click the button
• Reload simulation
• Break on (radio) events

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Project directories

• Previously called user platforms
• Adds functionality to COOJA
• A directory with a configuration file
• Import a simple project directory

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More on project directories

• Can be used for much more than adding
  applications to simulate!
• Interfaces, plugins, applications, mote types,
  radio mediums...
• Examples available incontiki-2.x/tools/cooja/exa
  mples
• Preview of emulated mote

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COOJAs Radio Mediums

• Currently two different alternatives ( one
  silent)
• Unit Disk Graph Medium (UDGM)
• Multi-path Ray-tracer Medium (MRM)
• Using MRM

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Quick-starting COOJA

• The usual way is via
• contiki-2.x/tools/cooja/gt ant run
• Shortcut that fits nicely into Contiki
  development
• yourapp/gt make myapp TARGETcooja
• Creates a typical simulation and starts a few
  plugins
• Hello-World

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Questions?
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Cross-Level simulations