But even after eliminating the Uno from your selection, you'll still be left with a wide array of Arduino boards to choose ... Micro feature 20 digital pins, labeled as RX, TX, D2 to D13, and ...

[Rafael] just made a little library that allows you to interface these modules to the Atmega328p-based Arduino UNO in order to gain some memory space. His work was actually based on the great ...

This feature isn’t exclusive to the Leonoardo, as [Michael] explains in a build he sent in – the lowly Arduino Uno can also serve as a USB HID keyboard with just a firmware update.