In the context of the HOBNET test-beds, the following experimental systems have been developed:

CTI SenseWall test-bed at Patras. SenseWall is an experimental sensor network test-bed we have created for the implementation and engineering of distributed sensor network algorithms.  It consists of 28 TelosB motes connected to a control Base Station PC via a USB tree formed by USB cables and USB hubs. It allows us to control the network and collect experimental measurements from the motes without interfering with the wireless communications, thus leaving the wireless medium free for the routing algorithms.  The motes are deployed in a sector-shaped topology in order to approach the bottle-neck effect of the sensors lying close to the sink.  The SenseWall testbed also includes a desktop PC that runs the MySQL server and the MoteProgrammer Java application, that allows us to massively program and control the motes.  We have already implemented and experimentally evaluated several routing algorithms on SenseWall.

UNIGE IRIDA test-bed. A new testebed has been established in the UniGe. It is a testbed comprised of 49 Libelium Waspmotes. The Waspmotes have an ATmega1281 microcontroller, running at 8MHz, 8KB SRAM, 4KB EEPROM, 128KB FLASH and are equipped with a 2GB SD Card each. The SD Card can be used to store extra programs for the firmware to run, which can be uploaded, updated, executed and deleted using an Over The Air protocol (OTAP) as well. Each Waspmote is connected with a USB cable which is used mainly to provide the power necessary for operation, but it could, theoretically be used to control the Waspmote as well. The current configuration forms a 49 Waspmote 7 x 7 grid. All the Waspmotes are vertically attached to a wooden construction which leans on the wall (see picture below).

The SPECKSIM simulator. The diagram highlights the hybrid simulation capabilities by presenting the flow of communication from real-­‐world devices to SpeckSim and then further to the external 3D Visualisation provided by Unity. A 3D visualisation of the floor plan of the Informatics Forum building of the University of Edinburgh was created for a demonstrator application. It was created using both ready-made materials such as desks, computers, chairs, doors and windows with blinds, and modelled objects such as planes, cubes for the walls and lights. The camera for the scene is placed above the floor plan to offer a birds-eye view. Sensors are placed in every room by utilizing cubes with lights shining on them. When the sensors are dormant they are red and when they receive packets at the CoAP layer, the colour turns to green. The hybrid capabilities of the simulator along with the external 3D visualisation were validated using a remote CoAP-enabled node. The node is located in an office in Geneva and captures and transmits the temperature of the room. The floor plan of the room was used to create a new game scene within the visualisation platform, Unity, in order to display accurately the environment in which the node is currently placed.

SpeckSim manual.


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