Part comparison

Arduino Mega 2560 Rev3 vs Arduino UNO R4 WiFi

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

25 shared specs8 scored

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ArduinoArduino Mega 2560 Rev3A000067

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ArduinoArduino UNO R4 WiFiABX00087

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Directional spec summary

Counts across 8 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

25 specifications compared side by side.

Arduino Mega 2560 Rev3 / Arduino UNO R4 WiFi
Compare bySpecification	AArduinoArduino Mega 2560 Rev3	BArduinoArduino UNO R4 WiFi
Electrical3
Minimum input voltage	6 V	6 V
Maximum input voltageUse-dependent	20 V	24 V
Logic voltage	5 V	5 V
Control & communication22
Board kind	Main controller	Main controller
Board architecture	Microcontroller board	Microcontroller board
Primary applicationUse-dependent	education;robotics;motion_control	education;robotics;wireless_embedded_control
Processor vendorUse-dependent	Microchip	Renesas;Espressif
ProcessorUse-dependent	ATmega2560	RA4M1;ESP32-S3
Processor architectureUse-dependent	AVR 8-bit	ARM Cortex-M4;Xtensa LX7
Processor clock	16 MHz	240 MHz224 MHz higher
RAM	0.0078 MB	0.5195 MB0.5117 MB higher
Flash	0.25 MB	0.25 MB
Open-source hardware	Yes	Yes
Open-source firmware	Yes	Yes
SDK available	Yes	Yes
Firmware updatable	Yes	Yes
UART interfaces	43 higher	1
I2C interfaces	1	1
SPI interfaces	1	1
USB interfaces	1	1
GPIO	5440 higher	14
Communication interfacesUse-dependent	UART;I2C;SPI;USB	Wi-Fi;Bluetooth;UART;I2C;SPI;USB
CertificationsUse-dependent	CE;RoHS	UKCA;FCC;REACH;CE;RCM;MIC;ISED/IC;KC
Compute board kind	microcontroller	microcontroller
MicrocontrollerUse-dependent	ATmega2560	RA4M1;ESP32-S3

AArduinoArduino Mega 2560 Rev3

BArduinoArduino UNO R4 WiFi

Electrical3

Minimum input voltage

Part A6 V

Part B6 V

Maximum input voltageUse-dependent

Part A20 V

Part B24 V

Logic voltage

Part A5 V

Part B5 V

Control & communication22

Board kind

Part AMain controller

Part BMain controller

Board architecture

Part AMicrocontroller board

Part BMicrocontroller board

Primary applicationUse-dependent

Part Aeducation;robotics;motion_control

Part Beducation;robotics;wireless_embedded_control

Processor vendorUse-dependent

Part AMicrochip

Part BRenesas;Espressif

ProcessorUse-dependent

Part AATmega2560

Part BRA4M1;ESP32-S3

Processor architectureUse-dependent

Part AAVR 8-bit

Part BARM Cortex-M4;Xtensa LX7

Processor clock

Part A16 MHz

Part B240 MHz224 MHz higher

RAM

Part A0.0078 MB

Part B0.5195 MB0.5117 MB higher

Flash

Part A0.25 MB

Part B0.25 MB

Open-source hardware

Part AYes

Part BYes

Open-source firmware

Part AYes

Part BYes

SDK available

Part AYes

Part BYes

Firmware updatable

Part AYes

Part BYes

UART interfaces

Part A43 higher

Part B1

I2C interfaces

Part A1

Part B1

SPI interfaces

Part A1

Part B1

USB interfaces

Part A1

Part B1

GPIO

Part A5440 higher

Part B14

Communication interfacesUse-dependent

Part AUART;I2C;SPI;USB

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

CertificationsUse-dependent

Part ACE;RoHS

Part BUKCA;FCC;REACH;CE;RCM;MIC;ISED/IC;KC

Compute board kind

Part Amicrocontroller

Part Bmicrocontroller

MicrocontrollerUse-dependent

Part AATmega2560

Part BRA4M1;ESP32-S3

Product sources

Product sources used by this comparison

Arduino Mega 2560 Rev3Open source ↗

Arduino UNO R4 WiFiOpen source ↗