The IoT is increasingly being used to support smart spaces and physical analytics and yet much of this smartness is made deliberately invisible to the user - echoing Weiser's vision of calm computing and technology that fades into the background. However, this means that users may not be aware or may not understand how the IoT is being deployed in their area. In other domains we know that a lack of awareness and a lack of understanding can lead to poor user experience and frustration, mistrust, suspicion, inability to capitalise on benefits and security vulnerabilities. In this paper, we present preliminary work that explores the issue of user awareness of IoT-based data collection.