Reducing their energy consumption has become an important concern for many
people lately. A necessary step to save energy is
to raise consumption awareness, that is: to realize how much electricity is
consumed by household appliances. In this Web of Things project, we
propose a system that uses and extends intelligent power outlets called
Ploggs, which contain sensor nodes to wirelessly measure the energy consumption of various devices.
We further describe the implementation of a web based API that exposes the
energy consumption of appliances through a lightweight RESTful interface.
Finally, a Web user interface enables users to monitor and control the
consumption of their appliances simply using their favorite web browser.
The Web-oriented architecture we have implemented using
the Ploggs is based on four main layers as shown in Figure 2.
The first layer is composed of appliances we want to monitor