Wr@p the last meter technology for energy aware networked smart appliances
by Valerio Aisa, Scientific Advisor at Indesit Company Spa (white goods, connected appliances, smart appliances, energy management) on Jul 10, 2011
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This paper presents a detailed analysis of Wr@p technology (Web Ready Appliances Protocol, also known as Power Modulation), an ultra-low-cost powerline communication solution devoted to the electrical ...
This paper presents a detailed analysis of Wr@p technology (Web Ready Appliances Protocol, also known as Power Modulation), an ultra-low-cost powerline communication solution devoted to the electrical appliance market. Wr@p technology is aimed at adding communication capability to a household appliance without affecting its industrial cost, thus speeding up the diffusion of “smart” appliances interacting with the power distribution grid and contributing to the smart grid paradigm.
A Wr@p transceiver establishes a narrow-band powerline communication exploiting the “last meter”, i.e. the power supply cord between the appliance and the outlet, where a proxy device, the smart adapter (SA), flexibly deals with standard home networking solutions. At the appliance side, such an approach allows for (i) connectivity at negligible cost and, (ii) keeps hardware and software virtually independent from the actual home networking protocol (since different configurations of the smart adapter take care of it). In this work, after recalling the basics of Wr@p point-to-point communication, an extension to the multipoint-to-point scenario is introduced. Design of silicon implementations integrated into commercial microcontroller architectures are presented and the results of extensive test of fabricated devices under actual operating conditions are detailed. Moreover, we present a complete Wr@p development solution, featuring wireless networks integration.
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