June 26, 2023

The UNO R4 is the latest update of Arduino’s next-generation UNO board, a significant revision of its 8-bit technology.


Powered by a 32-bit microcontroller, the new UNO R4 comes in two versions: the basic UNO R4 Minima and comprehensive UNO R4 WiFi, meeting the budgetary and creative needs of the maker community.

Preserving the standard form factor, shield compatibility and 5 V power supply of the popular UNO R3, the UNO R4 adds a 32-bit microcontroller with up to 16x the clock speed, memory and flash storage with the integration of the RA4M1 processor from Renesas. Based on an Arm® Cortex®-M4 core, the RA4M1 microcontroller on the Arduino UNO R4 features a clock speed of 48 MHz for higher processing power. To accommodate more complex projects, the UNO R4 is fitted with 32 kB of SRAM and 256 kB of flash memory. Plus, the Arm® Cortex®-M4 core features a Floating Point Unit (FPU), bringing a huge performance boost for certain applications. Software scalability is also supported on the new board, allowing easy upgrades for projects made with UNO R3 or Leonardo.

The UNO R4 WiFi version comes with an Espressif ESP32-S3 module for Wi-Fi® and Bluetooth® Low Energy connectivity. The bright 12×8 red LED matrix is ideal for creative projects using animations or for plotting sensor data without the need for additional display hardware.

For more information on this product visit New Products For Engineers.