Home Automation Technologies make possible the deployment of home monitoring and control applications. These technologies rely on different networking technologies. Some of them are oriented towards some basic functionalities like switching a device on, off and dimming for lights. Others tend to provide more advanced functionalities like reading of the actual temperature from a thermometer. In this paper, we group them in two categories: low level home automation protocols and high level home automation protocols. We then introduce a universal domotics integrator architecture for a unified home automation system based on the UPnP technology. This architecture could be extended to a large-scale Internet automation groundwork for globally interconnected devices. In this way, inter-device communications and automation procedures could be established via networking automation protocols in conjunction with web automation services. Finally, we study the feasibility, extendibility and inter-o...