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Distributed network of sensors form a deployable key to information with self organizing capabilities from smart environments (building, home, utilities, industrial, transportation etc). In this paper we present the vision of wireless sensor network (WSN) which enables the interconnectivity that extends the reach of cyberspace out into the physical world with the low cost, high sensing fidelity, flexibility, fault tolerance, and rapid deployment. Its highlights are remote controlling and monitoring of physical environment with small-scale energy supply, miniaturization, low-power circuit design in vast application domain. We emphasize on the issues and challenges for designing most suitable WSN.