Start and Stop

To start a simulation ise the following command:

1> nifty_cooja:start_simulation(Handler).
ok

This will run the simulation with the set speed limit. To change the speed limit, you can use the nifty_cooja:set_speed_limit/2 function:

2> nifty_cooja:set_speed_limit(Handler, 1.0).
ok

A value of 1.0 corresponds to a speed limit of 100%.

A simulation can be stopped with:

3> nifty_cooja:start_simulation(Handler).
ok

It is also possible to progress the simulation by fixed time slices:

4> nifty_cooja:simulation_step(Handler, 1000).
ok
5> nifty_cooja:simulation_step_ms(Handler).
ok

Time

You can get the current simulation time using the following commands:

6> nifty_cooja:simulation_time().
10726000
7> nifty_cooja:simulation_time_ms().
10726

Radio

Nifty Contiki offers the possibility to change the radio setup during the simulation. To get the current setup you can call:

8> nifty_cooja:radio_get_config(H).
{"class org.contikios.cooja.radiomediums.UDGM",
 [{"COUNTER_INTERFERED",31},
  {"COUNTER_RX",70},
  {"COUNTER_TX",101},
  {"INTERFERENCE_RANGE",100.0},
  {"SUCCESS_RATIO_RX",1.0},
  {"SUCCESS_RATIO_TX",1.0},
  {"TRANSMITTING_RANGE",50.0}]}

The return value contains the type of the radio and a list of options that are available. The type is fixed and cannot be changed, but the options can be altered. To change the radio setup, you need to construct a tuple {radio_type, Options} containing the options you want to set. You can then set the options with the following command:

9> nifty_cooja:radio_set_config(H,
      {"class org.contikios.cooja.radiomediums.UDGM",
       [{"TRANSMITTING_RANGE",25.0}]}).
ok

Currently only the UDGM radio offers these kind of option.