Part comparison

Arduino Uno Rev3 vs Arduino UNO R4 WiFi

A side-by-side comparison of source-backed specifications within the same subcategory.

12 shared specs3 scored

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ArduinoArduino Uno Rev3A000066

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ArduinoArduino UNO R4 WiFiABX00087

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Directional spec summary

Counts across 3 numeric specifications with a clear higher-or-lower direction.

Part A leads

Tied

Part B leads

These are metric-by-metric differences, not an overall performance score. Check the values below.

Specifications

12 specifications compared side by side.

Arduino Uno Rev3 / Arduino UNO R4 WiFi
Compare bySpecification	AArduinoArduino Uno Rev3	BArduinoArduino UNO R4 WiFi
Electrical1
Logic voltage	5 V	5 V
Control & communication11
Board kind	Main controller	Main controller
Board architecture	Microcontroller board	Microcontroller board
Primary applicationUse-dependent	education;robotics;embedded_control	education;robotics;wireless_embedded_control
Processor vendorUse-dependent	Microchip	Renesas;Espressif
ProcessorUse-dependent	ATmega328P	RA4M1;ESP32-S3
Processor clock	16 MHz	240 MHz224 MHz higher
USB interfaces	1	1
GPIO	14	14
Communication interfacesUse-dependent	USB;GPIO	Wi-Fi;Bluetooth;UART;I2C;SPI;USB
Compute board kind	microcontroller	microcontroller
MicrocontrollerUse-dependent	ATmega328P	RA4M1;ESP32-S3

AArduinoArduino Uno Rev3

BArduinoArduino UNO R4 WiFi

Electrical1

Logic voltage

Part A5 V

Part B5 V

Control & communication11

Board kind

Part AMain controller

Part BMain controller

Board architecture

Part AMicrocontroller board

Part BMicrocontroller board

Primary applicationUse-dependent

Part Aeducation;robotics;embedded_control

Part Beducation;robotics;wireless_embedded_control

Processor vendorUse-dependent

Part AMicrochip

Part BRenesas;Espressif

ProcessorUse-dependent

Part AATmega328P

Part BRA4M1;ESP32-S3

Processor clock

Part A16 MHz

Part B240 MHz224 MHz higher

USB interfaces

Part A1

Part B1

GPIO

Part A14

Part B14

Communication interfacesUse-dependent

Part AUSB;GPIO

Part BWi-Fi;Bluetooth;UART;I2C;SPI;USB

Compute board kind

Part Amicrocontroller

Part Bmicrocontroller

MicrocontrollerUse-dependent

Part AATmega328P

Part BRA4M1;ESP32-S3

Product sources

Product sources used by this comparison

Arduino Uno Rev3Open source ↗

Arduino UNO R4 WiFiOpen source ↗