Internet of things (IoT); Wireless sensor network; Home automation system

Home Automation Systems have been continuously evolving in the past few years: some of the systems are focusing their attention on providing remote access and control of the system, while others are more focused on the interconnectivity of the devices and on integrating them into greater systems, like smart cities. In this paper we propose a hierarchical architecture for Home Automation Systems, which aims at integrating both approaches. We propose a modular and scalable system, with multiple layers, each layer having its own distinct structure, functionality and challenges.