Arduino UNO R4 WiFi

The Arduino UNO R4 WiFi is an advanced development board designed for embedded and connected applications. It is powered by the Renesas RA4M1 Arm Cortex-M4 microcontroller running at 48 MHz, with expanded memory resources including 32 kB SRAM and 256 kB flash. The board features a USB-C interface, supports input voltages up to 24 V, and includes CAN bus and a 12-bit DAC for extended system control. It integrates an Espressif ESP32-S3 module to provide built-in WiFi connectivity. Fully compatible with Arduino UNO R3 shields and 5 V logic, it is suitable for engineering education, IoT prototyping, and professional development projects.

Featuers

- Renesas RA4M1 32-bit Arm Cortex-M4 microcontroller

- ESP32-S3 module with integrated WiFi connectivity

- 48 MHz operating clock frequency

- 32 kB SRAM and 256 kB flash memory

- USB-C interface with up to 24 V input support

- CAN bus interface for multi-board communication

- Compatible with Arduino IDE and UNO R3 shields

- 5 V logic level for direct sensor and actuator compatibility

- Standard UNO form factor for mechanical shield compatibility

- 14 digital GPIO pins with PWM support

- 6 analog input channels with 12-bit ADC

- 12-bit digital-to-analog converter output

- 12 × 8 onboard LED matrix for visual feedback

- Integrated real-time clock with battery backup support

- USB HID support for keyboard and mouse emulation

- SWD interface for advanced debugging and programming

- Onboard power management with multiple voltage regulation

Specifications

- Microcontroller: Renesas RA4M1 Arm Cortex-M4

- Operating Voltage: 5 V DC

- Input Voltage: 6–24 V DC

- Clock Frequency: 48 MHz

- SRAM: 32 kB

- Flash Memory: 256 kB

- Analog Input Resolution: 12-bit ADC

- Digital-to-Analog Output: 12-bit DAC

- Wireless Connectivity: WiFi 2.4 GHz, Bluetooth LE

- USB Interface: USB-C

- CAN Interface: Supported

- Dimensions: 68.6 × 53.4 mm

- Compatibility: Arduino IDE, Arduino UNO R3 shields

Links

- Arduino UNO R4 WiFi - 3D Model

- Arduino UNO R4 WiFi - 3D Case

- Renesas RA4M1 Group Datasheet

- How to use Arduino UNO R4 WiFi Development Board for IoT & Edge AI

Arduino Uno R4 Wifi LESSON 1: Getting Started for Absolute Beginners

Build Your Own IoT-Based Weather Monitoring Station | Arduino UNO R4 WiFi Project

Toutrials

- Arduino Uno R4 Wi-Fi projects

- Build Your Own IoT-Based Weather Monitoring Station