Basic Setup

The testbed setup is comprised of the following parts:

  • Wireless Sensor Network: This comprises of multiple Crossbow Imote2 nodes forming an adhoc wireless sensor network. They communicate with each other using the unlicensed 2.4 GHz frequency band.
  • Base Node: This is also an Imote2 node but is connected to a computer and acts as the interface between the control station (the computer) and the network of nodes.
  • Control station GUI: This is the software component, run on a PC, and is responsible for interaction between the human user and the network.
The interaction between these components is shown below:

The link between the base node and the PC is through the serial port or an USB cable, while the communication between the base node and the remaining network is wireless. The information from the network is relayed to the base node by multi-hop routing and the base node transfers this data to the control station. On the other hand, controls issued by the user are written onto the base node through the serial port. The base node, in turn uses unicast or broadcast communication to relay these commands to individual nodes or the entire network respectively.