FEEIT WSN Testbed: Effective System for Providing Emergency Situations’ Prevention and Surveillance - Application and Multidisciplinary Aspects of Wireless Sensor Networks - page 241

Legend
Temperature/Humidity Sensor

CO2 Sensor

SunSPOT

Wind Speed Sensor

Basestation

Data Base

SunSPOT

SunSPOT

Fig. 11.11 Early Fire Detection network architecture

11.3.5 Early Fire Detection

Prevention and efficient monitoring of possible fires leading to disastrous conse-
quences has become a global concern. The scenario called Early Fire Detection
presents the idea and the design of a small-scale wireless sensor network testbed
for early detection of fires mainly in outdoor settings (e.g., forest). The demo appli-
cation is developed with WSN nodes, i.e., Sun SPOTs, different sensors (tempera-
ture and humidity [ 5 ], wind speed [ 6 ] and CO2 sensors [ 9 ]), a server and a GSM/
GPRS gateway [ 14 ].
In order to achieve a small setup and to demonstrate the possibilities of the usage
scenario, basic setups and algorithms are designed for three Sun SPOTs. Different
algorithms in the SPOTs and on the server side serve to detect possible fire and its
possibility of spreading and, also, to send notification messages. The network archi-
tecture of the basic demo platform is depicted in Fig. 11.11 . Figure 11.12 shows the
GUI display of the sensors' parameters.

11.4 Lessons Learned

Deployment of a WSN testbed and development of different demos are demanding
tasks that require solving many issues. During the testbed setup, different problems
were encountered mainly in the hardware implementation. The software implementation
was also a challenging issue, but, as expected for Java programming, relatively easily
solvable.