The figure above gives a technical overview of the setup in a home. The information cycle starts with a current transformer that is clipped on a mains wire (1). This generates a current that is proportional to the current flowing through the wire. The Sensor Station (2) measures this and calculates the real power consumption. The result is wirelessly sent to the Hub (3). This hub uploads the data to the internet through a router where it is stored in a database (4). The data of all the competitors gets processed ‘in the cloud’ and is sent back to each hub. It calculates for instance the average energy usage of every user over the last 15 minutes. The hub forwards this information wirelessly to the display (5) where it gets interpreted. Depending on the situation, the user sees a different visualization.
If there are three competitors, this would give the following scheme:
Notice that the ‘Sensor Station’ and ‘Hub’ are respectively an ‘emonTx’ and a ‘NanodeRf’ / ‘emonBase’. The internet database could be Pachube or Thingspeak.