UNO R4 WiFi compatible development board
UNO R4 WiFi compatible development board with a Renesas RA4M1 MCU, ESP32-S3, USB-C and WiFi/Bluetooth connectivity for IoT projects.
SKU 1606-UNOR4WEAN 5410329711245Item type: BoardArduino compatible
Description
The UNO R4 WiFi development board is a modern electronics platform designed for building high-performance control, automation and wireless connectivity applications. Built around a powerful 32-bit Renesas RA4M1 microcontroller with an ARM Cortex-M4 core and backed by a dedicated ESP32-S3 module for WiFi and Bluetooth Low Energy communication, it makes it easy to develop IoT devices, monitoring systems, home automation, robotics and data acquisition. The standard board format guarantees compatibility with a wide range of shields and expansion modules already on the market, so plenty of accessories you already own can be reused. The USB Type-C port simplifies both power and programming, while the many hardware interfaces – including SPI, I²C, UART, CAN, analogue inputs and PWM outputs – offer great design flexibility. It is the ideal solution both for learning electronics and programming and for developing professional prototypes and industrial applications with built-in networking.
A 90 cm USB-C / USB-A cable is supplied with the board, usable both for power and for programming from a computer, so it can be put to work straight away with no need to buy extra accessories.

Technical specifications
- UNO R4 WiFi compatible board
- Renesas RA4M1 ARM Cortex-M4 microcontroller
- ESP32-S3 co-processor dedicated to wireless connectivity
- Built-in 2.4 GHz WiFi
- Bluetooth Low Energy (BLE)
- 14 digital I/O pins
- 6 analogue inputs
- 6 PWM outputs
- Built-in DAC converter
- Built-in 12×8 LED matrix (96 LEDs)
- RTC (Real Time Clock)
- Built-in CAN bus
- UART, SPI and I²C interfaces
- Qwiic connector (I²C) for plug-and-play connection
- USB Type-C port for power and programming
- Compatible with the Arduino IDE
- Compatible with most Arduino UNO R3 shields
- Ideal for IoT, automation, robotics, teaching and electronics prototyping.
Technical details
| Clock frequency | 48 MHz |
|---|---|
| MCU Flash memory | 256 KB |
| MCU SRAM | 32 KB |
| EEPROM | 8 KB |
| ADC resolution | 12 bit (up to 14 bit in software) |
| Logic voltage | 5 V |
| Supply voltage | 6-24 V (DC jack / VIN pin) |











