The Arduino UNO R4 WiFi is the latest iteration in the UNO series, featuring significant upgrades over its predecessors. This development board combines the processing power of the Renesas RA4M1 microcontroller with the wireless capabilities of the ESP32-S3 module, offering both Wi-Fi and Bluetooth connectivity.

Key Features of the UNO R4 WiFi

• Microcontroller: Renesas RA4M1 (Arm Cortex-M4) running at 48 MHz

• Wireless Connectivity: ESP32-S3 module with Wi-Fi and Bluetooth 5 LE

• USB Interface: USB-C port for programming and power

• Memory: 256 KB Flash, 32 KB SRAM

• Analog Capabilities: 12-bit DAC and operational amplifier (Op-Amp)

• Digital I/O: 14 digital pins, 6 PWM pins, 6 analog inputs

• Power Input: Supports 6–24V via VIN pin, with extended 24V tolerance

• Additional Features: CAN bus support, Qwiic I2C connector, onboard 12x8 LED matrix, and HID support for emulating keyboard/mouse

• RTC Support: Includes VRTC and OFF pins for real-time clock and power management