Arduino® UNO R4 WiFi

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Arduino® UNO R4 WiFi

Modified: 29/08/2023

Product Reference Manual

SKU: ABX00087

Description

The Arduino® UNO R4 WiFi is the first UNO board to feature a 32-bit microcontroller and an ESP32-S3 Wi-Fi®

module (ESP32-S3-MINI-1-N8). It features a RA4M1 series microcontroller from Renesas (R7FA4M1AB3CFM#AA0),

based on a 48 MHz Arm® Cortex®-M4 microprocessor. The UNO R4 WiFi's memory is larger than its predecessors,

with 256 kB flash, 32 kB SRAM and 8 kB of EEPROM.

The RA4M1's operating voltage is fixed at 5 V, whereas the ESP32-S3 module is 3.3 V. Communication between

these two MCUs is performed via a logic-level translator (TXB0108DQSR).

Target areas:

Maker, beginner, education