Arduino Uno R4 WiFi
Arduino Uno R4 WiFi
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Arduino Uno R4 WiFi

Part Number: ABX00087


The Arduino Uno R4 WiFi is the same awesome board like the Arduino Uno R4 Minima, taken to the max, with added WiFi and an LED matrix display.

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11 years after the launch of the Arduino Uno R3 (in 2012) comes the enhanced and improved Arduino UNO R4 WiFi which is armed with a powerful 32-bit ARM microcontroller courtesy of Renesas and a separate ESP32-S3 module for Bluetooth and WiFi wireless connectivity and a bonus 12×8 LED matrix display. 

The Arduino UNO R4 WiFi combines the processing power and exciting new peripherals of the RA4M1 microcontroller from Renesas with the wireless connectivity power of the ESP32-S3 from Espressif. On top of this, the UNO R4 WiFi offers an on-board 12×8 LED matrix, QWIIC connector, VRTC pin for backup battery and OFF pin, covering all potential needs makers will have for their next project. With the UNO R4 WiFi, you can easily upgrade your project and add wireless connectivity to expand the reach of your current setup. If this is your first project, this board has everything you need to spark your creativity.

Let’s explore what the UNO R4 WiFi has to offer:

Hardware compatibility with UNO form factor: The UNO R4 WiFi maintains the same form factor, pinout, and 5 V operating voltage as its predecessor, the UNO R3, ensuring a seamless transition for existing shields and projects. 

Expanded memory and faster clock: The UNO R4 WiFi boasts increased memory and a faster clock speed, enabling more precise calculations and effortless handling of complex projects.

Extra on-board peripherals: The UNO R4 WiFi introduces a range of on-board peripherals, including a 12-bit DAC, CAN BUS, and OP AMP, providing expanded capabilities and design flexibility.

Extended 24 V tolerance: The UNO R4 WiFi supports a wider input voltage range, allowing seamless integration with motors, LED strips, and other actuators using a single power source.

HID support: With built-in HID support, the UNO R4 WiFi can simulate a mouse or keyboard when connected to a computer via USB, making it easy to send keystrokes and mouse movements.

Wi-Fi® and Bluetooth®: The UNO R4 WiFi hosts an ESP32-S3 module, enabling makers to add wireless connectivity to their projects. Combined with the Arduino IoT Cloud, makers can monitor and control their projects remotely.

QWIIC connector: The UNO R4 WiFi features a Qwiic I2C connector, allowing easy connection to nodes from the extensive QWIIC ecosystem. Adapter cables also enable compatibility with sensors and actuators based on other connectors.

Support for battery-powered RTC: The UNO R4 WiFi includes additional pins, including an “OFF” pin to turn off the board and a “VRTC” pin to keep the internal Real-Time Clock powered and running.

LED matrix: The UNO R4 WiFi incorporates a bright 12×8 red LED matrix, ideal for creative projects with animations or plotting sensor data, eliminating the need for additional hardware.

Diagnostics for runtime errors: The UNO R4 WiFi includes an error-catching mechanism that detects runtime crashes and provides detailed explanations and hints about the code line causing the crash.

With all these features packed into the well-known UNO form factor, now is the perfect time to upgrade your project or embark on your maker journey. The UNO R4 WiFi offers unparalleled versatility and possibilities for makers of all levels.

Technical Specifications

  • Microcontroller: Renesas RA4M1 (Arm® Cortex®-M4 with Floating Point Unit)
  • Wireless controller: Espressif ESP32-S3
  • Clock Speed: 48 MHz (RA4M1) / upto 240 MHz (ESP32)
  • Memory: 256 KB Flash / 32 KB RAM (RA4M1) and 384 KB ROM/512 KB RAM (ESP32-S3)
  • USB: USB-C® Programming Port / HID
  • Digital I/O Pins: 14
  • Analog Inputs: 6
  • DAC: 1
  • PWM Pins: 6
  • Communication: UART, I2C (SDA, SCL and QWIIC), SPI, CAN (transceiver required), WiFi, BLE
  • Dimensions: 68.85 x 53.34 mm


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