Open file menu on cooja and create new simulation with random seeding.

It will auto-generate the seeds for every time reload the simulation.

File -new simulation (or) (ctrl+ n).

click -New random seed on reload option.

click -Create .

After click the create option number of tabs will appear in terminal it is basic necessary to simulate applications.

Open motes menu >> add motes >> create new motes type >> sky

Three files are necessary to run CoAP applications. In order to create the motes,

i. border- router.

ii. Coaps-server.c

iii.Coaps-client.c

To create border router motes

home/user/contiki/examples/ipv6/rpl-border-router/border-router.c

Choose the file in location >> compile >> create >> Add motes.

To create server motes.

  /home/user/contiki/examples/ipv6/CoAP-IDs/IPv6_Hc06_CoAP_tinydtls/coaps-server.c

Choose a file location >> compile>> create >> choose sever

count(optional)>> Add motes.

To create client motes .

  /home/user/contiki/examples/ipv6/CoAP-IDs/IPv6_Hc06_CoAP_tinydtls/coaps-client.c

Choose a file in location >> compile >> create >> choose client

count(optional) >> Add motes

Now connect the serial socket server in border router.

In cooja, network terminal .. View menu -choose the options you want,

For example: mote Type, mote ID’s, radio traffic, ...

Left click on border router motes >> choose: mote tools for sky1 >> serial socket(SERVER).

New tab will appear click : start -> now the default port will listen.

open one more command terminal and set directories to this location:

Cd contiki/ examples/ ipv6/ rpl-border-router/

Make connect-router-cooja the server will be connected to router.