R7FA4 PLUS B Development Board (UNO R4 WiFi Compatible)

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he R7FA4 PLUS B development board is based on the same RA4M1 32-bit microprocessor as the Arduino UNO R4 WiFi and uses a similar board style and layout.

The RA4M1 provides increased processing power, expanded memory, and additional peripherals. It is based on the Arm® Cortex®-M4 processor, with a main operating frequency of 48MHz. The board also features 256 kB of Flash and 32 kB of RAM.

Also onboard is an ESP32-S3 module, providing dual-mode 2.4GHz Wi-Fi and Bluetooth LE capabilities. This provides wireless communication and compatibility with Arduino IoT Cloud for remote monitoring and control.

For display and interactive projects, the board includes an onboard 12 x 8 red LED matrix, which is ideal for animations or displaying sensor data without the need for additional hardware. Additional features include a 12-bit DAC, CAN bus and operational amplifiers.

5V/3.3V headers make the integration of various expansion modules a lot easier. It also supports multiple power sources, including a USB-C connection or an external power supply ranging from 6V to 24V. For development purposes, the board comes with several LEDs including a power indicator, a user LED, and serial communication indicators (RX/TX).

Lastly, the inclusion of an ICSP interface, usable as an SPI interface, makes this board a flexible choice for developing advanced projects with enhanced connectivity and functionality. A USB-C cable is included.

We also stock the PLUS A version!


  • Based on R7FA4M1AB3CFM - compatible with Arduino UNO R4 Minima
  • Utilises Renesas Electronics' RA4M1 (Arm® Cortex®-M4) microcontroller
  • ESP32-S3 module, integrates 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication
    • Combined with Arduino IoT Cloud, you can remotely monitor and control your project
  • 12x8 Red LED matrix
  • 256 kB Flash and 32 kB RAM
  • 12-bit DAC
  • CAN bus
  • Operational amplifiers
  • 5V/3.3V headers for easy voltage switching
  • Flexible power options, supporting USB-C power supply or external input power VIN (6V<=VIN<=21V).
  • Onboard power indicator LED (PWR), USER LED, serial port receive indicator LED (RX) and transmit indicator LED (TX)
  • ICSP interface

What's on Board

  1. R7FA4M1AB3CFM
  2. ESP32-S3-MINI-1 module
  3. MP8759
    5V voltage regulator
  4. TXB0108DQSR
    Voltage translator, for communication between R7FA4 and ESP32-S3
  5. AMS1117-3.3
    3.3V voltage regulator
  6. DC input
    6V ~ 24V
  7. Qwiic connector
    For connecting I2C device of Qwiic Eco
  8. USB Type-C connector
    For uploading program OR serial port debugging
  9. Power output header
    3.3V OR 5V, voltage level configured by the onboard power configuration switch, used as power output and common-grounding with other boards
  10. ESP32-S3 pin-header
    for ESP32-S3-MINI-1 firmware downloading
  11. USB communication selection
  12. ICSP interface
  13. Power Configuration
    For configuring R7FA4 PLUS B operating voltage
  14. Reset button
  15. Arduino interface
    compatible with standard Arduino interface, adapting 2.54 pitch solder pad, can be directly connected to the experimental board
  16. User LED
  17. Serial port RX/TX indicators
  18. Power indicator
  19. 12 x 8 LED matrix


Microcontroller R7FA4 (32-bit ARM Cortex-M4)
ESP32-S3FN8 (Dual-core 32-bit Xtensa LX7)
Clock Frequency R7FA4: 48MHz
ESP32-S3FN8: 240MHz
Storage R7FA4: 256kB Flash, 32KB RAM
ESP32-S3FN8: 384kB ROM, 512kB RAM, 8MB Flash
Wireless Communication 2.4GHz WiFi + Bluetooth LE
Operating Voltage Options for 5V/3.3V, support more shields
Power Input 6~24V
Reset Button Lateral, easier to use when connecting with a shield
IO Pin Output Current 8mA
Digital Pins 14
Analogue Pins 6
I2C 1
DC Jack Low profile, shields won't be blocked anymore while connecting
Power Output Header Provides 5V OR 3.3V power output and common-grounding with other boards
5V Power Output Up to 2000mA Max, features higher driving capability
Experimental Board Support, the solder pad is provided for DIY interfaces to connect with the experimental board



Package Contents

  • 1x R7FA4 PLUS B 
  • 1x USB Type-A to Type-C cable

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