Arduino Uno R3 vs R4

What are the similarities, differences, and compatibilities between Arduino Uno R3 and Arduino Uno R4?



The Arduino UNO R4 is the new version of the Arduino UNO R3. The Arduino UNO R4 has a number of improvements over the previous UNO R3, including a faster processor, more memory, and a number of new peripherals. The Arduino UNO R4 is not fully compatible with Arduino UNO R3 because it uses the diffrent microcontroller.

For details, In the next parts, we will explore the following in order:

Hardware Features

Arduino IDE Compatibility

Arduino Shield Compatibility

The Arduino UNO R4 boards maintain both mechanical and electrical compatibility with previous versions, allowing for a seamless transition and utilization of existing shields and hardware. Most shields that are stackable on Arduino UNO R3 will also work with the Arduino UNO R4. However, it's important to note that not all shields compatible with Arduino UNO R3 will be compatible with the UNO R4. Here are a few scenarios to consider: