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Arduino

*NEW!* Compatible with Arduino UNO R4 WiFi [ABX00087] - Renesas RA4M1 / ESP32-S3

*NEW!* Compatible with Arduino UNO R4 WiFi [ABX00087] - Renesas RA4M1 / ESP32-S3

$24.99 USD
$24.99 USD
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The R4 WiFi is designed around the 32-bit microcontroller RA4M1 from Renesas while also featuring a ESP32 module for Wi-Fi® and Bluetooth® connectivity. Its distinctive 12x8 LED matrix makes it possible to prototype visuals directly on the board, and with a Qwiic connector, you can create projects plug-and-play style.

The MCU on the board is the high performance Renesas RA4M1 (Arm® Cortex®-M4) with a 48 MHz clock speed, 32 kB SRAM and 256 kB flash memory. This MCU features an RTC, a DAC and a CAN bus and has support for HID via USB.

The UNO R4 WiFi also features an ESP32-S3 for Wi-Fi®/Bluetooth® connectivity, which can also be separately programmed via a specific header.


Note on ESP header: the ESP32-S3 module on this board operates on 3.3 V. The ESP header located close to the USB-C® connector is 3.3V only and should not be connected to 5 V. This may damage your board.

Note on Qwiic connector: the Qwiic connector on this board is connected to a secondary I2C bus on this board, IIC0. This connector is 3.3 V only, connecting higher voltages may damage your board. To initialize this bus, use Wire1.begin() instead.

Maximum current draw per pin: the UNO R4 series' maximum current draw per GPIO is 8 mA, which is significantly lower than previous versions. Exceeding this limit may damage your pin / board.

Microcontroller
Renesas RA4M1 (Arm® Cortex®-M4)
Radio Module
ESP32-S3-MINI-1-N8
USB
USB-C® Programming Port
Pins
Digital I/O Pins 14
Analog input pins 6
DAC 1
PWM pins 6
External interrupts 2,3
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
RA4M1 48 MHz
ESP32-S3-MINI-1-N8 up to 240 MHz
Memory
RA4M1 256 kB Flash, 32 kB RAM
ESP32-S3-MINI-1-N8 384 kB ROM, 512 kB SRAM
Dimensions
Width 68.85 mm
Length 53.34 mm




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