Arduino UNO R4 WiFi

  1. Same form factor as UNO R3
  2. Inbuilt Wi-Fi and Bluetooth
  3. Onboard 12×8 LED Matrix
  4. Extra onboard peripherals
  5. Inbuilt HID Support
  6. Expanded Memory and Faster Clock Speed than before
SKU: C08-11-WIFI Categories: , Tag:


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Introducing the latest addition to the Arduino lineup, the Arduino UNO R4 WiFi board. This new version of the UNO board brings significant advancements, making it a powerful tool for your projects. The standout feature of the UNO R4 WiFi is the integration of an ESP32-S3 Wi-Fi module (ESP32-S3-MINI-1-N8) which equip the UNO with Inbuilt Bluetooth and WiFi.   The UNO R4 WiFi is part of the first UNO series of 32-bit development boards, being previously based on 8-bit AVR microcontrollers. There are thousands of guides, tutorials, and books written about the UNO board, where the UNO R4 WiFi continues its legacy.

Pin Configuration:

Powered by a 48 MHz Arm® Cortex®-M4 microprocessor, the board utilizes a RA4M1 series microcontroller from Renesas (R7FA4M1AB3CFM#AA0). With enhanced memory capabilities, the UNO R4 WiFi boasts 256 kB flash, 32 kB SRAM, and 8 kB of EEPROM. Additionally, a logic level translator (TXB0108DQSR) facilitates seamless communication between the RA4M1 and ESP32-S3 modules, ensuring optimal performance. Upgrade to the Arduino UNO R4 WiFi and experience the next level of Arduino innovation.


  1. The UNO R4 is now a 32-bit Microcontroller board, being previously based on 8-bit AVR
  2. The board features 14 digital I/O ports, 6 analog channels
  3. Dedicated pins for I2C, SPI and UART connections.
  4. It has a significantly larger memory:
    1. 8 times more flash memory (256 kB)
    2. 16 times more SRAM (32 kB).
  5. Fastest  48 MHz clock Speed. It is 3x faster than its predecessors.
  6. Onboard ESP32-S3 module for Wi-Fi & Bluetooth connectivity,
  7. Onboard 12×8 LED matrix
    1. Making one of the most visually unique Arduino boards to date.
    2. The LED matrix is fully programmable, where you can load anything from still frames to custom animations.

Note: For Detailed technical specifications go through the Datasheet in the attachment Section

Package Includes:

1 x Arduino UNO R4 WiFi Board


Arduino UNO R3 VS R4 – Differences Explained in Detail

Difference UNO R3 UNO R4
Microcontroller 8-bit ATmega328p 32-bit Renesas RA4M1
Clock frequency 16 MHz 48 MHz
Wireless module NO *ESP32-S3 Mini
Memory 2KB SRAM, 32KB FLASH,
256 kB Flash, 32 kB RAM
*ESP: 384 kB ROM, 512 kB SRAM
Input voltage (VIN) 6-20 V 6-24 V
Digital I/O pins 14
Analog input pins 6(10-bit) 6(14-bit)
PWM pins 6(8-bit) 6(12-bit)
DAC pin NO 1(12-bit)
CAN Bus NO 1
Dimensions 68.58 x 53.44 mm 68.6 x 53.4 mm




Arduino UNO R4 WiFi


48 MHz Arm Cortex-M4 microprocessor with a floating point unit (FPU) 5 V operating voltage Real-time Clock (RTC) Memory Protection Unit (MPU) Digital-to-analog Converter (DAC)


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


Capacitive Touch Sensing Unit (CTSU) USB 2.0 Full-Speed Module (USBFS) 14-bit ADC Up to 12-bit DAC Operational Amplifier (OPAMP)


Operating voltage for RA4M1 is 5 V Recommended input voltage (VIN) is 6-24 V Barrel jack connected to VIN pin (6-24 V) Power via USB-C at 5 V Schottky diodes for overvoltage and reverse polarity protection


1x UART (pin D0 , D1) 1x SPI (pin D10-D13 , ICSP header) 1x I2C (pin A4 , A5 , SDA , SCL) 1x CAN (pin D4 , D5 , external transceiver is required)


Wi-Fi support with 802.11 b/g/n standard (Wi-Fi® 4) Bit rate at up to 150 Mbps 2.4 GHz band


Bluetooth 5

Shipping Info


30.0000 g