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The process of great transformation of the global energy system according to the concept of “smart grid” involves the direct collaboration of household appliances, in particular white goods, which, to this purpose, are becoming "smart" and are able to exchange information with digital power meters through suitable communication infrastructures. But, unfortunately, there still are objective problems relating to connectivity that hinder the rapid spread of these products. Wr@p technology, which Indesit has decided to liberalize through a new family of microcontrollers (RX200 family, 32 bit dedicated to smart appliances) of Renesas (Japan), has the aim to completely solve these problems. After signing a free licence agreement between Indesit Company and Renesas (29 March 2010), Wr@p technology (also known as "power modulation") can be freely used by manufacturers of household appliances without paying any royalties to Indesit.