Explore Arduino® UNO R4 WiFi


The Arduino Uno R4 WiFi board is the latest addition to the Arduino family, offering a suite of advanced features while maintaining the robustness and versatility you’ve come to expect. This board brings a significant boost in processing power, thanks to its 32-bit Arm® Cortex®-M4 microcontroller, and it preserves compatibility with the standard form factor and shield stackability of the UNO series.

What’s new about Uno R4 compared to R3?

  • Enhanced Processing: Transition from an 8-bit AVR to a 32-bit Arm® Cortex®-M4 microcontroller.

  • Memory Upgrade: Elevate your projects with 32KB of SRAM and 256KB of NAND flash memory.

  • Advanced Connectivity: Experience seamless connectivity with USB-C and Wi-Fi.

  • Improved Performance: Accomplish more with faster processing and greater memory capacity.

  • Flexible Power Supply: Power up your board with up to 24V for broader project possibilities.

In addition to the above upgrades, the R4 WiFi also introduces the following new features:

New Features

  • Wi-Fi®: Provides wireless connectivity ideal for various IoT projects, enabled by the ESP32-S3 module.

  • Bluetooth®: Offers short-range wireless communication between devices, also powered by the ESP32-S3 module.

  • Built-in Real-Time Clock (RTC): Ideal for time-sensitive applications. Includes additional pins for battery-powered operation and an “OFF” pin to turn off the board while keeping the RTC running.

  • 12x8 LED Matrix: A simple way to display data or create animations.

  • DAC Channel: Achieve precise analog outputs, perfect for audio projects.

  • HID Support: Simulate a mouse or keyboard via USB with built-in HID support.

  • CAN Protocol Support: Extend your reach into automotive and industrial applications.