Official Arduino UNO EK R4 WiFi is a next-generation development board engineered to bring more power, connectivity, and flexibility to makers, students, and professionals. Designed as the advanced successor to the UNO R3, the UNO R4 WiFi integrates a 32-bit Renesas RA4M1 microcontroller, onboard WiFi and Bluetooth® connectivity, enhanced memory, and expanded features that elevate every project to the next level. Whether you are designing smart IoT systems, experimenting with sensors, or teaching embedded systems, this board delivers unmatched performance with the reliability of the Arduino ecosystem.

At its core, the Arduino UNO EK R4 WiFi is optimized for Internet of Things, automation, robotics, prototyping, and real-time data monitoring. Its increased processing speed, higher memory capacity, and robust wireless communication make it ideal for demanding applications. Backward compatibility with most UNO R3 shields ensures seamless project migration, while the built-in diagnostic tools and Qwiic connector simplify hardware interfacing.

If you’re looking for a high-performance, WiFi-enabled Arduino board for professional or academic use, the UNO EK R4 WiFi stands out as the most future-proof choice.

Key Specifications

• Microcontroller: 32-bit Renesas RA4M1 Cortex®-M4

• Operating Voltage: 5V

• Input Voltage (VIN): 6–24V

• Clock Speed: 48 MHz

• Flash Memory: 256 KB

• SRAM: 32 KB

• Digital I/O Pins: 14 (of which 6 support PWM)

• Analog Input Pins: 6

• Analog Output (DAC): 1 × 12-bit

• Communication: UART, I2C, SPI

• Wireless Connectivity:

  • WiFi (Espressif ESP32-S3 module)

  • Bluetooth® Low Energy

• USB Interface: USB-C

• Onboard Peripherals:

  • Qwiic I2C connector

  • Onboard RTC (Real-Time Clock)

  • Built-in LED matrix (12×8)

• DC Current per I/O Pin: 8 mA

• Dimensions: 68.85 × 53.34 mm

Top Features

1. Advanced 32-bit Performance

With a powerful ARM Cortex-M4 microcontroller, the UNO EK R4 WiFi offers significantly faster processing, smoother multitasking, and enhanced precision for complex applications.

2. Built-In WiFi & Bluetooth®

The ESP32-S3 module enables effortless wireless communication, IoT connectivity, remote monitoring, and high-speed data transmission.

3. Fully Compatible with UNO R3 Shields

Maintains the classic UNO footprint for easy transition while offering modern enhancements.

4. Onboard LED Matrix Display

A unique 12×8 LED matrix allows easy debugging, animations, notifications, and visual feedback without external modules.

5. Enhanced Memory & Flexibility

With larger flash and SRAM, the board supports advanced libraries, bigger sketches, and more complex programs.

6. Real-Time Clock (RTC) Support

Keeps accurate time for scheduling, logging, and automation even during power cycles.

7. USB-C Connectivity

Modern, reversible USB-C port for faster programming and reliable power delivery.

8. Secure IoT Development

Built-in cryptographic support helps protect data, authenticate devices, and enhance overall system security.

Applications

1. Internet of Things (IoT) Projects

Ideal for building connected devices such as smart home systems, security alarms, cloud dashboards, and environmental monitoring units.

2. Robotics and Automation

Perfect for controlling robots, machine actuators, motors, and sensor-based automation systems with real-time responsiveness.

3. Educational and Research Projects

Widely used in engineering labs, coding workshops, STEM education, and embedded system courses due to its user-friendly architecture.

4. Wearables & Portable Devices

Low-power operation, wireless communication, and real-time logging make it suitable for innovative wearable prototypes.

5. Industrial Monitoring

Useful for data acquisition, predictive maintenance tools, smart meters, and industrial IoT nodes.

6. Smart Agriculture

Suitable for soil monitoring, irrigation control, climate sensing, and remote farm management systems.

Why Choose the Arduino UNO EK R4 WiFi?

It offers the perfect blend of high performance, wireless versatility, and classroom-friendly design. Whether you’re a beginner exploring microcontrollers or a developer building market-ready prototypes, this board is engineered to deliver reliability and innovation.