The Arduino Uno R4 WiFi is a versatile board featuring a Renesas RA4M1 (Arm Cortex-M4) microcontroller, an ESP32-S3 module for Wi-Fi and Bluetooth, and a 12x8 LED matrix. It has
256 KB flash, 32 KB SRAM, 14 digital I/O pins, and 6 analog inputs. Key features include a USB-C connector, a real-time clock (RTC), a DAC, and support for communication protocols like I2C, SPI, and CAN.