Description The Arduino UNO R4 WiFi from Arduino combines the familiar UNO form factor with enhanced performance and built-in wireless connectivity. This board uses the Renesas RA4M1 32-bit microcontroller and includes an ESP32-S3 module for WiFi and Bluetooth connectivity. The board maintains compatibility with the UNO R3 shield ecosystem while offering increased memory, higher clock speed, and expanded peripherals. It also includes a 12×8 LED matrix, USB-C connectivity, and improved power options, making it suitable for IoT, automation, robotics, and embedded system development. Specifications Specification Details Model Arduino UNO R4 WiFi Microcontroller Renesas RA4M1 (Arm Cortex‑M4) WiFi / Bluetooth Module ESP32‑S3‑MINI‑1‑N8 (WiFi & Bluetooth) Operating Voltage 5 V (RA4M1) / 3.3 V (ESP32‑S3) Input Voltage (VIN) 6–24 V Digital I/O Pins 14 Analog Input Pins 6 PWM Pins 6 DAC 1 (12‑bit) ADC 6 Communication Interfaces UART, SPI, I2C, CAN Bus USB USB‑C Programming Port Clock Speed RA4M1: 48 MHz / ESP32‑S3: up to 240 MHz Memory (RA4M1) 256 kB Flash, 32 kB SRAM Memory (ESP32‑S3) 384 kB ROM, 512 kB SRAM Other Features Built‑in 12×8 LED Matrix, Qwiic Connector, OFF & VRTC Pins DC Current per I/O Pin 8 mA Dimensions 68.85 × 53.34 mm