It uses the latest version of the FooGadget protocol where it can lose hundreds of the transmissions from the sensor and still get the total consumption right. This is useful when you upgrade the server for example, even if the OpenNetHome is down for a while, the measurements of the energy consumption will still be correct for that period. The old protocol is also supported by the Item FooGadgetLegacy.
The FooGadgetPulse-Item can show a graph of the consumption over time. The graph shows the consumption in kW sampled and averaged over 15 minute periods:
Both FooGadgetPulse and ValueLogger are available in the nightly build.