Cooja

Learning outcomes

Java-based Contiki network simulation
Allows simulation of small and large networks
Two types of motes can be simulated:
- cooja motes run native code
- sky motes emulate the hardware but simulation may be slower as a result
You shouldn’t need to adjust your code to run in simulation

While compiling Contiki doesn’t require a windowing display, Cooja does
Two options for this:
- use VNC
- install a desktop environment
Try the instructions at https://github.com/contiki-ng/contiki-ng/wiki/Vagrant#provision-a-vm-with-a-desktop-environment

Adjust the Vagrantfile to uncomment vb.gui = true

config.vm.provider "virtualbox" do |vb|
  # Display the VirtualBox GUI when booting the machine
  vb.gui = true
end

$ ./contiki-ng/tools/vagrant/bootstrap-vbox-with-x.sh

Reboot after the install
I found that this added some virtualbox-guest packages which were then removed by vagrant’s vbguest plugin
If you don’t end up with a graphical login prompt, don’t worry—you can just run startx on the command line after logging in on the gui window.

You may need to download the cooja submodules if you haven’t already

$ cd ~/contiki-ng
$ git submodule update --init --recursive

If you encounter errors, try the fix suggested here: https://github.com/contiki-os/contiki/issues/2324

RPL is the Routing Protocol for Low power and Lossy Networks

Try the other simulation tutorials out until you feel you have a good understanding about what’s going on.
Review the code for the client and server and identify where messages are being sent and received.

We’ve covered getting the simulation gui up and running and running a basic simulation
This tool should come in handy when you write your own code