• Arduino UNO R4 WiFi board featuring RA4M1 microcontroller and ESP32-S3 wireless connectivity.
  • Arduino UNO R4 WiFi board featuring RA4M1 microcontroller and ESP32-S3 wireless connectivity, designed and assembled in Italy.
  • Arduino UNO R4 WiFi board showcasing LED matrix and connectivity features.
  • Arduino UNO R4 WiFi board with box, showcasing onboard features and wireless connectivity.
  • Arduino UNO R4 WiFi board packaging with technical specifications and connectivity features.
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Arduino UNO R4 WiFi: High-Performance IoT Microcontroller Board

Arduino UNO R4 WiFi: High-Performance IoT Microcontroller Board

🔥 4 sold•✓ In stock
HK$360.00
HK$360.00
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Short Product Description

Unlock the next level of innovation with the Arduino UNO R4 WiFi. Blending the legendary reliability of the UNO form factor with the high-performance Renesas RA4M1 processor and integrated ESP32-S3 wireless connectivity, this board is a powerhouse for modern electronics. Whether you are a beginner taking your first steps into coding or a seasoned engineer building complex IoT solutions, the UNO R4 WiFi provides the processing speed, memory, and native Bluetooth®/Wi-Fi® capabilities you need to bring your ideas to life instantly.

Key Features

  • Integrated Wireless: ESP32-S3 module enables seamless Wi-Fi and Bluetooth connectivity for cloud-based IoT projects.
  • 12x8 LED Matrix: Onboard display allows for immediate, hardware-free visual feedback and animation.
  • Enhanced Performance: Upgraded Renesas RA4M1 MCU provides faster clock speeds and more memory for complex software.
  • Full UNO Compatibility: Standard form factor and 5V operation ensure your existing shields and sketches work seamlessly.
  • HID Support: Emulate PC peripherals (keyboard/mouse) via USB for custom controller development.
  • Plug-and-Play Qwiic Connector: Rapidly prototype with a wide ecosystem of I2C sensors and accessories.
  • Flexible Power: Wide 6-24V input range allows for diverse power sourcing, from battery packs to mains adapters.

Full Product Description

The Evolution of the Maker Standard

The Arduino UNO R4 WiFi isn’t just an upgrade; it’s a revolution for your workbench. While it retains the iconic UNO shape and 5V compatibility that made its predecessors famous, it introduces a significant leap in computing power and connectivity. If you have been waiting for a board that bridges the gap between simple prototyping and advanced IoT functionality, this is the solution.

 

Seamless IoT Connectivity & Processing

At the heart of the R4 WiFi lies the Renesas RA4M1 (ARM® Cortex®-M4). This chip brings significantly more flash memory and RAM to the table, allowing you to run complex code and handle demanding tasks without the lag. Coupled with the Espressif ESP32-S3 module, you gain native Wi-Fi and Bluetooth connectivity, enabling you to connect your projects to the cloud, monitor sensor data remotely, or interface with mobile devices without needing extra shields.

 

Interactive Visuals Out-of-the-Box

Forget the hassle of wiring up external displays for debugging or UI. The UNO R4 WiFi features a built-in 12x8 LED matrix, providing a creative canvas to display animations, sensor readings, or simple text right on the board. It’s perfect for educational purposes, quick data visualization, or adding a "wow" factor to your custom gadgets.

 

Engineered for Advanced Projects

This board is designed to handle more than just blinking LEDs. With a built-in 12-bit DAC, CAN BUS, and an operational amplifier, it is ready for high-end industrial and hobbyist applications. Plus, with HID (Human Interface Device) support, your board can act as a keyboard or mouse, making it an incredible tool for custom macro pads and assistive technology projects.

Technical Specifications

  • Microcontroller: Renesas RA4M1 (ARM® Cortex®-M4)
  • Connectivity: ESP32-S3 (Wi-Fi + Bluetooth®)
  • USB: USB-C® Connector
  • Digital I/O Pins: 14
  • Analog Inputs: 6
  • PWM Pins: 6
  • DAC: 1 (12-bit)
  • Communication: CAN BUS, I2C (Qwiic), SPI, UART
  • Clock Speed: 48 MHz
  • Memory: 256 KB Flash, 32 KB RAM
  • Input Voltage (VIN): 6-24 V
  • Dimensions: 68.85 mm x 53.34 mm

Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

FAQ Section

Q: Can I use my old Arduino UNO shields with the R4 WiFi?A: Yes, the R4 WiFi maintains the exact same form factor and 5V pinout, ensuring high compatibility with most existing shields.

Q: How do I power the board?A: You can power the board via the USB-C port or through the VIN pin with a 6-24V DC power source.

Q: Is the ESP32-S3 module difficult to program?A: Not at all! The Arduino IDE handles the programming for both the main MCU and the ESP32 module, keeping the experience simple and unified.

Target Users / Applications

  • IoT Students & Educators: Ideal for learning connected electronics.
  • Hardware Engineers: Perfect for rapid prototyping and industrial proof-of-concept.
  • Creative Makers: Great for wearable tech, home automation, and custom input devices.
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