Arduino UNO R4 WiFi Development Board

Arduino UNO R4 WiFi Development Board is a 32-bit UNO-series board with a 48 MHz Arm Cortex-M4 microprocessor and integrated wireless connectivity.

Overview

The board is built around a Renesas RA4M1 series microcontroller, which provides the main processing. A dedicated ESP32-S3 Wi-Fi module, featuring a built-in antenna, handles wireless communication, supporting both Wi-Fi and Bluetooth. A logic-level translator manages communication between the main and wireless microcontrollers, ensuring seamless integration. This marks the first time integrated wireless connectivity has been introduced to the UNO series.

Memory and Power

The board offers 256 KB of flash memory, 32 KB of SRAM and 8 KB of EEPROM, providing space for more complex sketches and data storage. The RA4M1 operates at a 5 V logic level, while the ESP32-S3 module runs at 3.3 V. Power can be supplied through a 6-24 V barrel jack connected to the VIN pin, or directly through the USB-C port at 5 V.

Key Features

• Wi-Fi 4 (802.11 b/g/n) support on the 2.4 GHz band with data rates up to 150 Mbps, plus Bluetooth
• 1x UART, 1x SPI, 1x I2C and 1x CAN bus for interfacing with sensors, actuators and other peripherals
• Capacitive touch sensing unit, USB 2.0 full-speed module and up to 14-bit ADC and DAC
• Operational amplifier for precision signal conditioning
• Classic UNO footprint measuring 68.6 mm x 53.4 mm, compatible with most existing shields and accessories

Applications

Ideal for hobbyists, educators and professional developers, the board suits projects where wireless connectivity, expanded memory and extensive I/O are required. Its UNO footprint supports use with compatible shields and accessories.

Choose the Arduino UNO R4 WiFi Development Board when you need a UNO-format board with integrated wireless connectivity, expanded memory and extensive I/O for prototyping and development.