Arduino UNO Rev4 WiFi

Name: Arduino UNO Rev4 WiFi
Brand: Arduino
SKU: ARD018
Price: 34.9 EUR
Availability: InStock

Arduino Official Boards (Genuine)

Reference: ARD018

Part.No: ABX00087

€34.90

Last items in stock

The Arduino UNO R4 WiFi is the most powerful UNO board with built-in Wi-Fi — combining the Renesas RA4M1 (Cortex-M4 @ 48MHz) with an ESP32-S3 (up to 240MHz) for Wi-Fi & Bluetooth, plus a stunning 12×8 LED matrix. Full UNO shield compatibility, USB-C, CAN bus, and DAC included.

📡 Wi-Fi + Bluetooth LE built-in via ESP32-S3
⚡ RA4M1 @ 48MHz + ESP32-S3 @ 240MHz — dual-chip architecture
🔲 12×8 LED Matrix for animations, graphics & visual feedback
🇨🇾 Fast shipping within Cyprus

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Description
Product Details

Arduino UNO R4 WiFi — The Flagship UNO with Wi-Fi, Bluetooth and LED Matrix

The Arduino UNO R4 WiFi (SKU: ABX00087) is the most complete UNO board ever made. It is built on a dual-chip architecture: the Renesas RA4M1 (Arm Cortex-M4 @ 48MHz) handles primary hardware control, while the co-processor ESP32-S3 (up to 240MHz) delivers Wi-Fi, Bluetooth LE, and additional computing power. The impressive 12×8 LED matrix opens new possibilities for visual feedback, animations, and educational applications — all in the UNO form factor with full shield compatibility.

Technical Specifications

Feature	Specification
Main MCU	Renesas RA4M1 (Arm Cortex-M4 @ 48MHz)
Co-processor	ESP32-S3 (up to 240MHz) — Wi-Fi + BLE
Connectivity	Wi-Fi (802.11 b/g/n) + Bluetooth LE 5
RA4M1 Memory	256 kB Flash / 32 kB RAM
ESP32-S3 Memory	384 kB ROM / 512 kB SRAM
LED Matrix	12×8 (96 LEDs), fully programmable
Digital I/O Pins	14 (6 PWM)
Analog Inputs / DAC	6 / 1 (12-bit)
Communication	UART ×1, I2C ×1, SPI ×1, CAN ×1
USB / Voltage	USB-C · 5V (VIN: 6–24V)
DC Current per I/O Pin	8 mA
Dimensions	68.85mm × 53.34mm (UNO form factor)

R4 WiFi vs R4 Minima — Which one should I choose?

	UNO R4 WiFi	UNO R4 Minima
Main MCU	RA4M1 @ 48MHz	RA4M1 @ 48MHz
Wi-Fi / BLE	✓ (ESP32-S3)	✗
LED Matrix	✓ 12×8	✗
CAN bus / DAC	✓ / ✓	✓ / ✓
Shield compatibility	✓ UNO pinout	✓ UNO pinout
Best for	IoT, connected projects, education	Standalone projects, industrial use

Who is it for?

Students: The 12×8 LED matrix makes learning instantly visual — see results, animations, and counters directly on the board without an external display. Ideal for IoT, smart home, and connected robotics projects with built-in Wi-Fi.
Educational institutions: The R4 WiFi is the reference board for modern IoT and networking courses. One board replaces a UNO + Wi-Fi module + LED display — simpler setup, fewer components, cleaner educational experience.
Makers & hobbyists: Build connected projects without shields: weather dashboards, IoT sensors, smart displays, Bluetooth-controlled robots, and home automation — all on one board with full UNO shield compatibility for expansion with sensors and modules.

Frequently Asked Questions

How does the dual-chip RA4M1 + ESP32-S3 architecture work?
The RA4M1 is the main microcontroller that runs your Arduino sketches and controls the I/O pins. The ESP32-S3 acts as a co-processor exclusively for Wi-Fi and Bluetooth — it communicates with the RA4M1 via UART. Programming is done normally through the Arduino IDE without needing to interact directly with the ESP32-S3.

Do the I/O pins operate at 5V or 3.3V?
The RA4M1 I/O pins operate at 5V — full compatibility with classic UNO shields and sensors. The ESP32-S3 internally operates at 3.3V, but this does not affect the external I/O pins.

Can I use the LED matrix for custom animations?
Yes. The 12×8 LED matrix (96 LEDs) is controlled via an Arduino library and supports scrolling text, custom animations, and real-time data display. It is one of the most popular features of the R4 WiFi for educational applications and interactive projects.

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