Arduino UNO R4 Wifi (Original Chip)

The Arduino UNO R4 WiFi brings next-generation performance and wireless connectivity to the iconic UNO platform. Powered by the Renesas RA4M1 32-bit microcontroller and paired with an ESP32-S3 module, this board delivers higher processing power, more memory, and seamless Wi-Fi® and Bluetooth® connectivity. Designed with full hardware compatibility with the UNO R3, the UNO R4 WiFi supports existing shields, operates at 5V logic, and fits perfectly into current projects. New onboard features such as a 12×8 LED matrix, Qwiic I2C connector, CAN bus, operational amplifier, and 12-bit DAC greatly expand design possibilities without additional hardware. With support for Arduino IoT Cloud, HID functionality, extended input voltage tolerance up to 24V, and built-in runtime error diagnostics, the UNO R4 WiFi is an excellent choice for beginners and advanced makers alike. Tech specs Board Name Arduino® UNO R4 WiFi SKU ABX00087 Microcontroller Renesas RA4M1 (Arm® Cortex®-M4) USB USB-C® Programming Port Pins Digital I/O Pins 14 Pins Analog input pins 6 DAC 1 PWM pins 6 Communication UART Yes, 1x I2C Yes, 1x SPI Yes, 1x CAN Yes 1 CAN Bus Power Circuit operating voltage 5 V (ESP32-S3 is 3.3 V) Input voltage (VIN) 6-24 V DC Current per I/O Pin 8 mA Clock speed Main core 48 MHz ESP32-S3 up to 240 MHz Memory RA4M1 256 kB Flash, 32 kB RAM ESP32-S3 384 kB ROM, 512 kB SRAM Dimensions Width 68.85 mm Length 53.34 mm Applications IoT and cloud-connected projects Smart home automation Robotics and motor control Educational and learning platforms Prototyping and product development Sensor networks using Qwiic modules USB HID devices (keyboard/mouse emulation)