User guide

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UZL-Testbed User Guide

Foundations of Adaptive Networked Societies of Tiny Artefacts

offers scripting functionality and the use of local variables we use JShawn to configure the simulation.

Refer to [7] for detailed information.

The testbed topology is described by /scenario_fronts.xml. The xml-file defines the real positions of

the nodes as well as the link properties between nodes.

As the simulator uses increasing numbers from 0 to n as ids for n+1 nodes for an efficient algorithmic

processing we added functionality in iSense enabling the usage of arbitrary ids. Setting the global

variable use_tag_ids to “true” in your configuration file like

shawn.setGlobalVariable("use_tag_ids", "true");

causes that iSense ids are read from a node tag called “isense_id” which is also defined in the xml-file.

Note, that os().id() has not necessarily the same value as os().proc().owner().id() in this case!!

To find a Shawn::Node by its iSense MAC address (os().id()) use the method

class ShawnGlueProcessor

{

static shawn::Node* find_node_by_id_w(shawn::World& w_,uint16 i)throw();

}

instead of owner().world().find_node_by_id( 1234 ).

Example: ShawnGlueProcessor::find_node_by_id_w((ShawnOs* &os_)->proc().

owner_w().world_w(), 0x060d);

The above mentioned xml-file contains these ids additionally to the positions:

…

</node>

…

</snapshot>

</scenario>

You can load this snapshot by using the shawn command load_world:

shawn.runCommand("load_world", "world_in_file=scenario_fronts.xml

snapshot=0 processors=isense");