The Arduino UNO R4 WiFi is a next-generation evolution of the classic Arduino UNO, designed to combine full shield compatibility with modern 32-bit performance, wireless connectivity, and enhanced I/O features. Ideal for students, makers, and IoT prototypes, this board merges a Renesas RA4M1 MCU with an ESP32-S3 co-processor for Wi-Fi and Bluetooth® 5, while adding a 12×8 LED matrix, Qwiic/STEMMA QT port, USB-C, and a true 12-bit DAC, offering powerful, versatile, and connected development in a familiar UNO form factor.

Features:

• 5V Logic Compatible: Works with most classic Arduino UNO shields and tutorials.

• Wireless Connectivity: ESP32-S3 co-processor provides Wi-Fi (802.11 b/g/n) and Bluetooth® LE 5.

• Built-in LED Matrix: 12×8 LED matrix for visual feedback, debugging, or custom icons and text.

• Plug-and-Play I2C: Qwiic/STEMMA QT port allows easy sensor and peripheral connection without soldering.

• Advanced I/O: True 12-bit DAC, on-chip op-amp, and CAN controller (via external transceiver) for creative projects.

• USB-C Connectivity: Power and program the board via USB-C; supports HID emulation for keyboard/mouse projects.

• High-Quality Components: Retains classic UNO footprint with enhanced reliability and functionality.

• Extended Power Range: VIN supports 6–24V, while the logic voltage remains 5V.

Key Specifications:

• Main MCU: Renesas RA4M1 (Arm® Cortex®-M4, 48 MHz)

• Wireless Co-Processor: ESP32-S3 for Wi-Fi and Bluetooth LE 5

• Memory: 256 kB Flash, 32 kB SRAM, 8 kB data flash

• GPIO: 14 digital pins, 6 analog inputs, 1× 12-bit DAC, PWM on designated pins

• Communication Buses: UART, I2C, SPI, CAN (external transceiver required)

• USB Interface: USB-C for programming and power

• Extras: 12×8 LED matrix, Qwiic/STEMMA QT connector, VRTC and OFF pins

• Logic Voltage: 5V (ESP32-S3 domain 3.3V)

• Power Input (VIN): 6–24V

• Form Factor: 68.6 × 53.4 mm (UNO standard)

Applications:

• IoT Prototyping: Connect devices via Wi-Fi or BLE for remote control and data collection.

• STEM Education: Learn programming, electronics, and embedded systems with classic UNO shield support.

• Visual Feedback Projects: LED matrix for debugging, display, and interactive outputs.

• Sensor Integration: Qwiic/STEMMA QT allows quick I2C sensor additions for rapid prototyping.

• Creative Interfaces: Use USB-C HID functionality for custom keyboards, mice, and interactive controls.

• Automation and Robotics: CAN bus and DAC for advanced control of motors, actuators, and analog devices.

Package Includes:

• 1 × Arduino UNO R4 WiFi Board

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