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Peacefair pzem-021 energy meter hacked SPI to SERIAL out AVR mega 88

The Peacefair PZEM-021 energy meter is very popular and super cheap at ebay - the unit is very good and usefull for all sorts of projects and to be used when working with mains powered electronics. This energy meter is very well known and very much used by electronic geeks out there, however it comes with NO WAY to connect it to the outside world, with this hack its readings can go anywhere the user wishes, PC ? live online ? webpage ? test system ? what ever”

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