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
  • Connect to Wi-Fi
  • WiFi-Controlled LED (Access Point)
• Bluetooth
  • Basic Concepts of BLE
  • Example: Bluetooth-Controlled LED
• Real-Time Clock
  • Scheduled Repetitive Tasks
• 12x8 LED Matrix
  • How to store LED matrix data in Arduino
  • Display pattern on LED matrix
  • Arduino LED Matrix Editor
  • Display Animations
• Digital-to-Analog Converter (DAC)
  • Play Music with DAC
• USB HID
  • Mouse Control
  • Keyboard Control
  • Caveats and Tips

• 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.