Abstract
The field server which gathers information of the water quality in coastal areas in wireless sensor network was designed and fabricated. Water pollution data is transmitted between field servers, and finally to the base station in self-organizing wireless sensor network. The collected data includes dissolved oxygen (DO), hydrogen ion exponent (pH), conductivity, turbidity, depth of water and temperature, by a water quality sensor module. The information provides real-time monitoring of water quality at the coastal marine area. And wireless sensor network-based flooding routing protocol is designed and used to transfer the measured water quality information efficiently. In addition, field servers can be energy efficiently controlled by connected PC to conserve the energy of field servers through query process, depending on the situation. A query system is implemented using Java program to run on a server PC, connected serially via RS-232 protocol to the base station. The Telosb series sensor node is programmed by nesC language in TinyOS platform for small scale wireless sensor network monitoring at a server PC.
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