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.

Then, an Arduino board might ... the Rev3 and R4 WiFi is the number of their serial ports and I2C buses. The Rev3 has a single serial connection, shared by the USB port and the RX/TX pins.

A second difference is that Minima has the Renesas MCU debug bought out to connector called ‘SWD’ for connection to an external debugger, while on R4 WiFi the Renesas MCU debug port is taken to the ...