Arduino UNO R4 WiFi – Built for Speed, Memory, and Wireless Communication.
The Arduino UNO R4 WiFi Board sets a new standard for versatility and power in the world of microcontrollers. Designed in India, this board combines the trusted UNO form factor with modern wireless capabilities, making it a favorite among developers working on next-generation IoT and embedded systems.
At the heart of the UNO R4 WiFi is a 48MHz RA4M1 microcontroller from Renesas, built on Arm® Cortex®-M4 architecture with a floating point unit (FPU), ensuring superior processing power and multitasking capabilities. Accompanying this is the ESP32-S3 Wi-Fi® module (ESP32-S3-MINI-1-N8), offering dual-core performance with Wi-Fi and Bluetooth Low Energy (BLE) capabilities.
Key hardware features include a Real-Time Clock (RTC) for time-sensitive applications, a Memory Protection Unit (MPU) for added system security, and advanced analog interfaces like a 14-bit ADC and a 12-bit DAC for high-precision sensor readings and analog signal output. The board also boasts 256KB of flash memory and 32KB of SRAM, providing ample storage for complex applications.
Whether you're developing a smart home project, an industrial automation system, or experimenting with wireless communication in robotics, the Arduino UNO R4 WiFi offers unmatched flexibility and reliability.
Perfect for beginners, students, and professional engineers alike, this board ensures that your creative potential is never limited.
Key Features: Arduino UNO R4 WiFi Board
- Renesas RA4M1 Arm® Cortex®-M4 microprocessor @ 48MHz with FPU (Floating Point Unit)
- Real-Time Clock (RTC) for accurate time tracking
- Memory Protection Unit (MPU) for enhanced security
- Digital-to-Analog Converter (DAC) for analog signal generation
- 256 KB Flash and 32 KB SRAM for expanded program memory
- 14-bit ADC (Analog-to-Digital Converter) for high-precision input
- 12-bit DAC (Digital-to-Analog Converter) for precise analog output
- Operates at standard 5V voltage — easy compatibility
Specifications: Arduino UNO R4 WiFi Board
- Microcontroller: RA4M1 (48 MHz, 32-bit Arm® Cortex®-M4)
- Wireless Module: ESP32-S3-MINI-1-N8
- Flash Memory: 256 KB
- SRAM: 32 KB
- EEPROM: 8 KB
- 14-bit ADC, 12-bit DAC
- RTC, MPU included
- Operating Voltage: 5V
- ESP32-S3 Voltage: 3.3V
- Communication: Logic Level Translator (TXB0108DQSR)
- Made In: India
Package Includes:
- 1x Arduino UNO R4 WiFi Board (Original)
- 1x USB Cable
- 1x User Manual / Quick Start Guide
Use Cases: Arduino UNO R4 WiFi Board
Best for:
• Smart Home Automation Systems
• IoT Prototyping and Development
• Wireless Robotics Projects
• Educational STEM Kits
• Industrial Wireless Control Applications
5 FAQs: Arduino UNO R4 WiFi Board
1. What processor does the Arduino UNO R4 WiFi use?
It features the RA4M1 32-bit Arm® Cortex®-M4 processor from Renesas, clocked at 48MHz.
2. Does the UNO R4 WiFi support both Wi-Fi and Bluetooth?
Yes, thanks to the integrated ESP32-S3 module, it supports both Wi-Fi and BLE 5.0 connectivity.
3. Can I use old Arduino UNO shields with this board?
Most standard Arduino UNO shields are compatible, but always check for voltage compatibility.
4. How is communication managed between the RA4M1 and ESP32-S3?
It uses a logic level translator (TXB0108DQSR) to manage voltage differences.
5. Is this board good for professional IoT projects?
Absolutely! With powerful processing, Wi-Fi/BLE support, and rich memory, it’s ideal for professional applications.
