I bought this ELEGOO UNO R3 board to upgrade my 3D printers. I updated it from factory firmware to the latest Marlin firmware and this little board worked great! As an original Arduino Uno board, I think this board might be exactly the same as Arduino Uno, at least I don't see any difference in compatibility and performance. So if you're looking for Arduino Uno and you find this one, buy it. with confidence because it will be basically the same, it comes with a cable, the cable is a little short, but be aware that this cable is sometimes a little difficult to find when you need it, it is rarely at home , if you don't need it. You don't have a printer because it's the same type of cable as your printer. Oh! and it's tiny too, you can place this board anywhere, it doesn't take up much space, please refer to the dimensions provided by the manufacturer, but in general it seems to be the same size as the Arduino Uno.
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