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Wireless sensor networks have become an essential part of home and building automation, especially for energy management and health monitoring. This paper presents a Distributed Operating System (DOS) based on the Service-Oriented Architecture (SOA) to manage all embedded devices in a home network at high level of interoperability. This system can solve many problems related to accessing home network from Internet and future networks like Smart Grids. The proposed system takes into consideration the limited resources of sensors as well as the matters of simultaneous multi-access, eventing, authorization, security and scheduling the on-line time of sensors in order to reduce power consumption. The paper shows the advantages of using some features of our SOA distributed operating system, like using a queue with a dispatcher to dispatch the simultaneous web requests and also using cache and scheduling, in addition to using a requester to enable accessing embedded devices with different networking protocols. These features help in increasing the quality of services and reaching high level of reliability.