Arduino® UNO R4 WiFi
🔵📡 Arduino UNO R4 WiFi
The Arduino UNO R4 WiFi is the next-generation upgrade of the legendary UNO, combining a powerful 32-bit microcontroller, built-in WiFi + Bluetooth, and an onboard LED matrix — while keeping the classic UNO form factor and shield compatibility.
📊 INFOGRAPHIC OVERVIEW
🧠 Main MCU : Renesas RA4M1 (32-bit ARM Cortex-M4) ⚡ Clock Speed : 48 MHz 💾 Flash Memory : 256 KB 🧮 SRAM : 32 KB 📡 Connectivity : WiFi + Bluetooth LE (ESP32-S3 module) 🔢 Digital I/O Pins : 14 📊 Analog Inputs : 6 📺 Onboard Display : 12x8 LED Matrix (96 LEDs) 🔌 Operating Voltage : 5V 📏 Form Factor : Classic UNO Layout
🚀 KEY FEATURES (Point-by-Point)
🧠 1️⃣ 32-bit ARM Cortex-M4 Processor
Renesas RA4M1 MCU
48 MHz clock speed
Faster & more powerful than UNO R3 (16 MHz AVR)
Suitable for more complex applications
📡 2️⃣ Built-in WiFi + Bluetooth
Powered by ESP32-S3 module
WiFi connectivity for IoT projects
Bluetooth LE for wireless control
Arduino IoT Cloud compatible
👉 No external WiFi shield required.
📺 3️⃣ 12×8 LED Matrix Built-In
96 programmable LEDs
Display text, animations, sensor data
Great for interactive projects & education
🔌 4️⃣ I/O & Interfaces
| Feature | Details |
|---|---|
| Digital I/O Pins | 14 |
| PWM Pins | 6 |
| Analog Inputs | 6 (14-bit ADC) |
| DAC | 1 (12-bit) |
| UART | Yes |
| I²C | Yes |
| SPI | Yes |
| CAN Bus | Yes |
✔ UNO shield compatible
✔ Supports 5V logic
⚡ POWER & VOLTAGE
Operating Voltage: 5V
USB-C powered
VIN input supported
Backward compatible with many UNO shields
🤖 IDEAL APPLICATIONS
✅ IoT Devices
✅ Smart Home Projects
✅ Robotics Control
✅ Real-time Data Monitoring
✅ Educational STEM Labs
✅ Wireless Sensor Networks
🆚 UNO R4 WiFi vs UNO R3
| Feature | UNO R4 WiFi | UNO R3 |
|---|---|---|
| Architecture | 32-bit ARM | 8-bit AVR |
| Clock Speed | 48 MHz | 16 MHz |
| WiFi | ✔ Yes | ❌ No |
| Bluetooth | ✔ Yes | ❌ No |
| LED Matrix | ✔ Built-in | ❌ No |
| CAN Bus | ✔ Yes | ❌ No |
👉 UNO R4 WiFi is a major upgrade over R3.
🎯 Why Choose Arduino UNO R4 WiFi?
✔ Modern 32-bit performance
✔ Built-in wireless connectivity
✔ Onboard LED matrix for creative projects
✔ 5V compatible
✔ Shield backward compatibility
✔ Ideal for IoT + robotics development
Since you work with robotics and Arduino boards, UNO R4 WiFi is perfect for offering modern IoT-ready UNO boards while keeping familiarity for beginners and students.
