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How to read utility meters

Nowadays everything is smart. Everything is connected to the Internet. Everything can be controlled remotely. But what about utility meters? I wanted to know how to gather data from electricity-, water- and gas meters as frequently as possible. First, I decided to study electricity meters as they seem the easiest. At the time of writing this article, I live in Hungary. I will try to emphesize all the time when I am writing about country specific things.