Part comparison

Arduino UNO R4 WiFi vs Arduino Nano 33 IoT

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

16 shared specs1 scored

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ArduinoArduino UNO R4 WiFiABX00087

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ArduinoArduino Nano 33 IoTABX00027

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Directional spec summary

Counts across 1 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

16 specifications compared side by side.

Arduino UNO R4 WiFi / Arduino Nano 33 IoT
Compare bySpecification	AArduinoArduino UNO R4 WiFi	BArduinoArduino Nano 33 IoT
Electrical3
Minimum input voltageUse-dependent	6 V	5 V
Maximum input voltageUse-dependent	24 V	18 V
Logic voltageUse-dependent	5 V	3.3 V
Control & communication13
Board kind	Main controller	Main controller
Board architectureUse-dependent	Microcontroller board	Standalone board
Primary applicationUse-dependent	education;robotics;wireless_embedded_control	embedded_control;iot;mobile_robot
Processor vendorUse-dependent	Renesas;Espressif	Microchip
ProcessorUse-dependent	RA4M1;ESP32-S3	SAMD21
Processor architectureUse-dependent	ARM Cortex-M4;Xtensa LX7	Arm Cortex-M0+
Processor cores	32 higher	1
SDK available	Yes	Yes
Firmware updatable	Yes	Yes
Wireless interfacesUse-dependent	Wi-Fi;Bluetooth	Wi-Fi;Bluetooth LE
Communication interfacesUse-dependent	Wi-Fi;Bluetooth;UART;I2C;SPI;USB	Wi-Fi;Bluetooth LE
Compute board kind	microcontroller	microcontroller
MicrocontrollerUse-dependent	RA4M1;ESP32-S3	SAMD21

AArduinoArduino UNO R4 WiFi

BArduinoArduino Nano 33 IoT

Electrical3

Minimum input voltageUse-dependent

Part A6 V

Part B5 V

Maximum input voltageUse-dependent

Part A24 V

Part B18 V

Logic voltageUse-dependent

Part A5 V

Part B3.3 V

Control & communication13

Board kind

Part AMain controller

Part BMain controller

Board architectureUse-dependent

Part AMicrocontroller board

Part BStandalone board

Primary applicationUse-dependent

Part Aeducation;robotics;wireless_embedded_control

Part Bembedded_control;iot;mobile_robot

Processor vendorUse-dependent

Part ARenesas;Espressif

Part BMicrochip

ProcessorUse-dependent

Part ARA4M1;ESP32-S3

Part BSAMD21

Processor architectureUse-dependent

Part AARM Cortex-M4;Xtensa LX7

Part BArm Cortex-M0+

Processor cores

Part A32 higher

Part B1

SDK available

Part AYes

Part BYes

Firmware updatable

Part AYes

Part BYes

Wireless interfacesUse-dependent

Part AWi-Fi;Bluetooth

Part BWi-Fi;Bluetooth LE

Communication interfacesUse-dependent

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

Part BWi-Fi;Bluetooth LE

Compute board kind

Part Amicrocontroller

Part Bmicrocontroller

MicrocontrollerUse-dependent

Part ARA4M1;ESP32-S3

Part BSAMD21

Product sources

Product sources used by this comparison

Arduino UNO R4 WiFiOpen source ↗

Arduino Nano 33 IoTOpen source ↗