Sensor networks contribute to the interconnection of a large variety of devices (i.e. transducers, sensors, actuators) thus, enable monitoring and control processes. While new wireless technologies are emerging, a major issue of interoperability has to be addressed in terms of data communications, controlling and interfacing in order to confront the heterogeneity of networks and connected devices and enable end-to-end communication, as well as efficient resource management. A proposed solution to this problem is the provision of a unified service access architecture, which will support common interfaces for data communications, as well as device management and control that will be based on open standards. The concept of object virtualization and IP based networking is introduced for resolving interoperability issues. In this context, the architecture can serve applications that are in line with Machine-to-Machine (M2M) and Internet-of-Things (IoT) concepts.