advanced metering reader software (electricity)

Do any of you know of a simple (FLOSS) advanced metering software? I am particularly interested on one that can "catch" the wifi signal that is already being sent with my electricity consumption (kwh) to a stand alone device that sits at home. I would like to pick it up on my laptop. I tried searching online and I only found that there seems to be some set of international standards [1], a crowd sourcing project that caught my eye [2] and a science paper [3]. The project [2] caught my eye because it makes your home into a smart home. I was very interested by it because the central computer seemed to be gnu/linux. The rest of it is not open source: at the most they said that they might publish some API. This lost my interest because it seems to need acess to your home router and I felt a bit uneasy on this bit. Regards, Andres [1] https://en.wikipedia.org/wiki/Open_Met ering_System [2] http://www.ulule.com/wattio/[3] http://www.academicjournals.org/JEEER/PDF/Pdf2011/Aug/Ananthapadmanabha%20et %20al.pdf