Unleash Your Wireless Prototyping Potential: The UNO R4 WiFi

The UNO R4 WiFi merges the RA4M1 microprocessor from Renesas with the ESP32-S3 from Espressif, creating an all-in-one tool for makers with enhanced processing power and a diverse array of new peripherals. With its built-in Wi-Fi® and Bluetooth® capabilities, the UNO R4 WiFi enables makers to venture into boundless creative possibilities. Furthermore, this versatile board boasts a convenient on-board 12x8 LED matrix and a Qwiic connector, offering ample space for innovation and unleashing creativity. This dynamic combination empowers makers to transform their ideas into reality and elevate their projects to unprecedented heights.

Key Features:

• Microcontroller: Powerful 32-bit Renesas RA4M1 MCU for faster processing and advanced capabilities.


• WiFi Connectivity: Built-in ESP32 module enables seamless WiFi and Bluetooth® integration for your IoT projects.


• Form Factor: Classic Arduino UNO form factor with familiar pin layout ensures compatibility with a vast range of shields and modules.


• Power Input: Wide input range (6-24V) via VIN pin for flexible powering options.


• USB-C® Port: Modern USB-C® connector for easy programming and power supply.


• Software Compatibility: Fully compatible with Arduino IDE for a familiar and user-friendly development environment.

Technical Specifications:

• Microcontroller: Renesas RA4M1 Series (32-bit)


• Operating/logic Voltage: 5V


• DC Input Voltage: 6V to 24V


• Digital I/O Pins: 14 (with PWM capability on multiple pins)


• Analog Input Pins: 6 (12-bit ADC)


• DC Current per I/O Pin: 8mA


• DC Current for 3.3V Pin: Up to 50mA


• Flash Memory: 256kB


• SRAM: 32KB


• Clock Speed: Up to 48MHz


• WiFi module: ESP32-S3 with 240MHz, 384kB ROM, 512kB SRAM

The UNO R4 WiFi Advantages:

• 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 12x8 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.

Arduino UNO R4 WiFi Datasheet (external link)

Need more than we have? Order now, we will ship when back in stock. Lead time about 2-3 weeks. See our backorder policy.