(Discontinued) Official Arduino UNO R4 WiFi
Review: 5 - "A masterpiece of literature" by John Doe, written onMay 4, 20020
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(Discontinued) Official Arduino UNO R4 WiFi
(Discontinued) Official Arduino UNO R4 WiFi_1
(Discontinued) Official Arduino UNO R4 WiFi_font
(Discontinued) Official Arduino UNO R4 WiFi
(Discontinued) Official Arduino UNO R4 WiFi_1
(Discontinued) Official Arduino UNO R4 WiFi_font

(Discontinued) Official Arduino UNO R4 WiFi

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  • Product SKU: ABX00087
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Highlights
  • Original, High Quality
  • KitsGuru Warranty
  • 32-bit Cortex-M4
  • WiFi + BLE
  • ESP32-S3 Module
  • LED Matrix
  • UNO R3 Compatible
  • USB Type-C
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  • Video Support to be purchased separately
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Specification

Description

Official Arduino UNO R4 WiFi – 32-bit Arm Cortex-M4 with ESP32-S3 & LED Matrix (ABX00087)

The Official Arduino UNO R4 WiFi is the next-generation evolution of the world’s most popular Arduino board. For the first time in the UNO family, this board transitions from an 8-bit AVR architecture to a powerful 32-bit Arm® Cortex®-M4 microcontroller, delivering significantly higher performance, expanded memory, and modern connectivity.

Powered by the Renesas RA4M1 (R7FA4M1AB3CFM) running at 48 MHz, the UNO R4 WiFi features built-in Wi-Fi and Bluetooth® 5 through an onboard ESP32-S3-MINI-1 module. A dedicated logic level translator (TXB0108) ensures seamless communication between the 5 V RA4M1 MCU and the 3.3 V ESP32-S3 module.

Maintaining the same UNO R3 form factor, the UNO R4 WiFi is backward-compatible with most existing shields, while introducing exciting new features such as a fully programmable 12×8 LED matrix, CAN bus support, DAC output, RTC, and capacitive touch sensing—making it one of the most feature-rich UNO boards ever released.

Technical Details

  • Item Type: Development Board
  • Model: UNO
  • Model Name: Arduino UNO R4 WiFi
  • Model Number: ABX00087
  • Main Microcontroller: Renesas RA4M1 (R7FA4M1AB3CFM)
  • CPU Architecture: 32-bit Arm® Cortex®-M4 with FPU
  • Clock Speed: 48 MHz
  • Operating Voltage: 5 V
  • Form Factor: Arduino UNO R3 Compatible

Memory

  • Flash Memory: 256 kB
  • SRAM: 32 kB
  • EEPROM (Data Memory): 8 kB

Connectivity

  • Wi-Fi: ESP32-S3-MINI-1-N8, IEEE 802.11 b/g/n (2.4 GHz)
  • Bluetooth: Bluetooth® 5
  • USB: USB-C® (USB 2.0 Full-Speed)
  • CAN Bus: Supported (External transceiver required)

Communication Interfaces

  • UART: 1 × UART (D0, D1)
  • SPI: 1 × SPI (D10–D13, ICSP Header)
  • I²C: 1 × I²C (A4, A5, SDA, SCL)
  • CAN: D4, D5 (with external transceiver)

Input / Output

  • Digital I/O Pins: 14
  • Analog Input Channels: 6 (14-bit ADC)
  • DAC Output: Yes (Up to 12-bit)
  • PWM: Supported on multiple digital pins
  • LED Matrix: 12 × 8 onboard, fully programmable

Onboard Peripherals

  • 12×8 LED Matrix (96 LEDs)
  • Real-Time Clock (RTC)
  • Memory Protection Unit (MPU)
  • Capacitive Touch Sensing Unit (CTSU)
  • Operational Amplifier (OPAMP)
  • Logic Level Translator (TXB0108)
  • Inbuilt HID Support

Power Specifications

  • Operating Voltage: 5 V
  • Recommended VIN Input: 6 – 24 V
  • Power via Barrel Jack: 6 – 24 V (connected to VIN)
  • Power via USB-C: 5 V

Features

  • First 32-bit UNO board in the Arduino lineup
  • 3× faster than classic UNO boards
  • Built-in Wi-Fi and Bluetooth® 5
  • Fully programmable 12×8 LED matrix
  • Expanded memory compared to UNO R3
  • Same UNO R3 form factor and shield compatibility
  • Advanced peripherals including CAN, DAC, RTC, and CTSU
  • Ideal for modern IoT, HMI, and connected projects

Applications

  • IoT and connected devices
  • Smart home and automation projects
  • Human-machine interfaces (HMI)
  • Educational and STEM learning
  • Wireless sensor networks
  • Rapid prototyping with LED displays and animations

Physical Attributes

  • Board Form Factor: Arduino UNO
  • Dimensions (L × W): Approx. 68.6 × 53.4 mm
  • USB Connector Type: USB-C
  • LED Matrix Size: 12 × 8 LEDs
  • Net Weight: Approx. 45 g

Package Includes

  • 1 × Official Arduino UNO R4 WiFi Development Board (ABX00087)

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