Arduino UNO R4 WiFi Development Board
Arduino UNO R4 WiFi Development Board
Product Overview
The Arduino UNO R4 WiFi combines the familiar UNO form factor with the powerful Renesas RA4M1 ARM Cortex-M4 processor and built-in ESP32-S3 WiFi/Bluetooth connectivity. Featuring a 12×8 LED matrix, Qwiic connector, CAN Bus, DAC, and USB-C interface, it is ideal for IoT, robotics, automation, and embedded development projects.
Description
The Arduino UNO R4 WiFi is the next-generation evolution of the classic Arduino UNO platform, offering significantly enhanced performance while maintaining compatibility with existing UNO shields and accessories.
Powered by the Renesas RA4M1 32-bit ARM Cortex-M4 processor running at 48MHz, the board delivers improved processing capability, expanded memory, and advanced peripheral support.
An onboard ESP32-S3 module provides WiFi and Bluetooth Low Energy (BLE) connectivity, enabling seamless IoT integration, cloud connectivity, wireless monitoring, and remote control applications.
The UNO R4 WiFi also introduces a built-in 12×8 LED matrix, allowing developers to display text, animations, notifications, and sensor data without requiring an external display.
Additional enhancements such as a 12-bit DAC, CAN Bus interface, Qwiic connector, and USB Type-C connectivity make this board suitable for industrial automation, robotics, smart home systems, educational projects, and advanced embedded development.
Whether you're building IoT devices, automation systems, robotic platforms, or cloud-connected sensors, the Arduino UNO R4 WiFi provides a powerful and versatile development platform.
Applications
- Arduino IoT projects
- Smart home automation
- Wireless sensor networks
- Robotics development
- Industrial automation
- CAN Bus applications
- Cloud-connected devices
- Environmental monitoring
- STEM education
- Embedded systems development
Key Features
- Renesas RA4M1 32-bit ARM Cortex-M4 MCU
- Built-in ESP32-S3 WiFi & BLE module
- Integrated 12×8 LED Matrix
- USB Type-C connectivity
- Qwiic I2C connector
- 12-bit DAC output
- CAN Bus support
- 5V operating voltage
- Backward compatible with Arduino UNO shields
- Arduino Cloud support
Technical Specifications
| Specification | Details |
|---|---|
| Main MCU | Renesas RA4M1 |
| CPU Architecture | ARM Cortex-M4 |
| Clock Speed | 48 MHz |
| Wireless Module | ESP32-S3 |
| WiFi | 2.4GHz WiFi |
| Bluetooth | Bluetooth Low Energy (BLE) |
| Operating Voltage | 5V |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| ESP32-S3 SRAM | 512 KB |
| USB Interface | USB Type-C |
| DAC | 12-bit DAC |
| LED Matrix | 12 × 8 (96 LEDs) |
| CAN Bus | Supported |
| Qwiic Connector | Supported |
| Shield Compatibility | Arduino UNO R3 Compatible |
Package Includes
- 1 × Arduino UNO R4 WiFi Development Board
Processing Unit
- Renesas RA4M1
- ARM Cortex-M4
- 48MHz Clock Speed
Wireless Connectivity
- ESP32-S3 Coprocessor
- WiFi 2.4GHz
- Bluetooth Low Energy (BLE)
Memory
- 256KB Flash
- 32KB SRAM
- 512KB ESP32-S3 SRAM
Built-in Features
- 12×8 LED Matrix
- 12-bit DAC
- CAN Bus
- Qwiic Connector
- USB Type-C
Compatibility
- Arduino IDE
- Arduino Cloud
- Arduino UNO R3 Shields
How It Works
The Arduino UNO R4 WiFi uses the Renesas RA4M1 microcontroller as the primary processing unit while the ESP32-S3 module handles wireless communication tasks.
Users can program the board using the Arduino IDE, connect to WiFi networks, communicate through Bluetooth, display information on the built-in LED matrix, and interact with sensors, actuators, and cloud services.
The board can function as a web server, IoT node, wireless controller, or data acquisition system while remaining compatible with most Arduino UNO accessories and shields.