Name: Arduino UNO R4 WiFi
Brand: Arduino
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Arduino® UNO R4 WiFi

16 / 23 Arduino® UNO R4 WiFi Modiﬁed: 26/06/2023

11.2 Pin Voltage

The general operating voltage for UNO R4 WiFi is 5 V, however the ESP32-S3 module's operating voltage is 3.3 V.

Note: It is very important that ESP32-S3's pins (3.3 V) do not come in contact with any of the RA4M1's pins (5 V), as

this may damage the circuits.

11.3 Pin Current

The GPIOs on the R7FA4M1AB3CFM#AA0 microcontroller can safely handle up to 8 mA of current. Never connect

devices that draw higher current directly to a GPIO as this may damage the circuit.

For powering e.g. servo motors, always use an external power supply.

Mechanical Information

12 Pinout

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Arduino UNO R4 WiFi Specifications

General