Recent technologies applied or explicitly developed for assisting people with physical disabilities or weaker individuals needing particular attention, are becoming an emerging research topic. In this paper we focus on ambient care systems and we present an overall architecture that aims to provide multiple interfaces between a smart house and its guests. In particular we describe the results applied in the project Casa + , a smart house that is addressed to people with Down syndrome; it offers functionalities for monitoring the environment and its guests, giving indication signals, audio messages or even alarms in case of incorrect actions. Through exploitation of the most recent technologies, keeping in mind the trade off with costs, we developed the following functionalities: security, time management, assistance for daily activities, monitoring and remote control, outdoor tracking.