This widespread popularity is pretty much justified, though. After all, the Arduino boards come with ... That said, we'll be focusing on the Uno R3 in this discussion instead.

Software scalability is also supported on the new board, allowing easy upgrades for projects made with UNO R3 or Leonardo. Requests from the Arduino community see the USB port upgraded to USB-C ...

Arduino will continue to make available the Arduino UNO R3 and provide support to all those Arduino enthusiasts that have and would like to create projects using its 8-bit AVR microcontroller.

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