Arduino UNO Original R4 WiFi Development Board

The Arduino UNO R4 WiFi is a powerful evolution of the classic UNO line, merging dual microcontrollers to offer robust processing and wireless capabilities—all while maintaining full UNO R3 compatibility.

KEY FEATURES:

• Dual-core architecture: Renesas RA4M1 (ARM Cortex-M4) + Espressif ESP32-S3 WiFi/BT

• UNO form factor: Same pinout and 5V logic as UNO R3

• Extended I/O: 12×8 LED matrix, Qwiic I²C connector, DAC, CAN bus, OP-AMP, RTC

• Wi-Fi: 802.11 b/g/n (Wi-Fi 4), up to 150 Mbps

• Bluetooth: Bluetooth 5 LE

SPECIFICATIONS:

Microcontrollers:

• Renesas RA4M1 (Cortex-M4F, 48 MHz)

• ESP32-S3-MINI-1-N8 (dual-core Xtensa LX7, up to 240 MHz)

Memory:

• RA4M1: 256 kB Flash, 32 kB SRAM, 8 kB EEPROM

• ESP32-S3: 384 kB ROM, 512 kB SRAM

I/O Capabilities:

• 14 Digital I/O pins

• 6 Analog Inputs

• 6 PWM pins

• 1 DAC (12-bit)

• UART, SPI, I²C, CAN (external transceiver)

Power & Voltage:

• Operating voltage: 5V (RA4M1), 3.3V (ESP32-S3)

• Input (VIN or barrel jack): 6–24V

Dimensions: 68.85 mm × 53.34 mm

PACKAGE INCLUDES:

• 1 x Arduino UNO R4 WiFi Board