UNO R4 Minima / UNO R4 WiFi Development Board

Take your Arduino projects to the next level with the UNO R4 Development Board, the latest generation of the iconic UNO platform. Powered by the Renesas RA4M1 32-bit Arm® Cortex®-M4 microcontroller running at 48 MHz, the UNO R4 delivers significantly higher performance, increased memory, and advanced peripherals while maintaining the familiar UNO form factor and 5V compatibility with most existing Arduino shields.

Choose between two versions to match your project requirements:

• UNO R4 Minima – A powerful standalone development board featuring enhanced processing, built-in DAC, CAN Bus, HID support, and expanded memory for general embedded applications.

• UNO R4 WiFi – Includes all the features of the Minima plus an ESP32-S3 coprocessor for Wi-Fi® and Bluetooth® connectivity, a built-in 12×8 LED matrix, and a Qwiic® connector, making it ideal for IoT, cloud-connected, and wireless projects.

Whether you're building robotics, automation systems, smart home devices, data loggers, or educational projects, the UNO R4 offers improved performance while preserving the ease of use that has made Arduino the world's most popular development platform.

Features

• Renesas RA4M1 32-bit Arm® Cortex®-M4 microcontroller

• 48 MHz CPU clock

• 256 KB Flash Memory

• 32 KB SRAM

• 8 KB EEPROM (Data Flash)

• Standard Arduino UNO R3-compatible form factor

• 5V operating logic compatible with most UNO shields

• USB Type-C connector

• Built-in 12-bit DAC for true analog output

• CAN Bus interface for industrial and automotive communication

• HID support for keyboard and mouse emulation

• SWD debugging interface

• Multiple PWM, UART, SPI, and I²C communication interfaces

• Wide input voltage support (6–24 V via barrel jack)

UNO R4 WiFi Exclusive Features

• Built-in ESP32-S3 wireless coprocessor

• Wi-Fi® connectivity

• Bluetooth® Low Energy (BLE)

• Integrated 12×8 red LED matrix

• Qwiic® I²C connector for plug-and-play sensor expansion

• Arduino Cloud ready for IoT applications

Technical Specifications

• Microcontroller: Renesas RA4M1 (Arm Cortex®-M4)

• Clock Speed: 48 MHz

• Operating Voltage: 5 V

• Flash Memory: 256 KB

• SRAM: 32 KB

• EEPROM (Data Flash): 8 KB

• Digital I/O Pins: 14

• PWM Outputs: 6

• Analog Inputs: 6

• ADC Resolution: Up to 14-bit

• DAC Resolution: 12-bit

• Communication Interfaces:

  • UART

  • SPI

  • I²C (TWI)

  • CAN Bus

• USB Interface: USB Type-C

• Power Input:

  • USB Type-C

  • DC Barrel Jack (6–24 V)

Applications

• Arduino development and prototyping

• Internet of Things (IoT)

• Robotics

• Home automation

• Industrial monitoring

• Sensor interfacing

• Data logging

• Educational STEM projects

• Motor control

• Smart devices

Package Includes

• 1 × UNO R4 Development Board (Selected Version)

Note: Please select the desired model (UNO R4 Minima or UNO R4 WiFi) before placing your order. The UNO R4 maintains the familiar Arduino UNO layout and is compatible with many existing UNO R3 shields, although some older libraries may require updates for full compatibility.

Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.

Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.

Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.