However, because the R4 WiFi still comes in the same form factor as the Uno Rev3, it remains compatible with existing hardware (e.g., shields, sensors) originally designed for the Rev3.

The Uno Rev3, is a great beginner board as it's included in many starter kits. It's also complemented with a host of online resources that even without the official Projects Book from Arduino, you ...

This second version – Rev2 – of the Arduino Uno WiFi board is functionally the same as the Arduino Uno Rev3, but also comes with built-in WiFi, enabling easy connection to the Internet, plus the ...