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Arduino Uno R4 WiFi — Arduino Development Guide
Provides comprehensive pinout reference, board specifications, and Arduino C++ development guide for the Arduino Uno R4 WiFi (Renesas RA4M1 + ESP32-S3) microcontroller. Use when writing Arduino firmware for the Arduino Uno R4 WiFi, wiring peripherals, or configuring pins. Keywords: Arduino, Uno, R4, WiFi, RA4M1, ESP32-S3, Renesas, Cortex-M4, C++, pinout, GPIO, I2C, SPI, UART, DAC, CAN, WiFi, BLE, Bluetooth, LED matrix, Qwiic, analog, digital, PWM, 5V, 32-bit, USB-C, arduino-cli.