Arduino Nano R4 (ABX00142)

Nano R4 merges Arduino’s signature ease of use with the powerful Renesas RA4M1 microcontroller, enabling effortless scaling from prototyping on the UNO R4 to production-ready applications.

Compact and versatile, the Nano R4 maintains the same pinout as other boards in the Nano family and features castellated pins for easy hardware integration, an on-board Qwiic connector for rapid sensor and peripheral expansion, and a programmable RGB LED for intuitive system feedback. Its single-sided component design makes it ideal for space-constrained products and SMD soldering on custom carrier boards, ensuring a seamless transition from lab testing to real-world deployment.

Thanks to its compatibility with familiar Arduino tools and libraries (including those for the Arduino UNO R4 Minima), the Nano R4 offers developers and designers a streamlined path to build compact, connected, and production-ready solutions.

Key Benefits

Effortless transition from prototyping to production	Leverage the RA4M1 microcontroller already trusted in the UNO R4 family, with minimal code adjustments needed.
Compact, production-ready design	Tiny 4.3 × 1.7 cm footprint, castellated pins, and single-sided components facilitate easy integration into custom hardware.
Easy expansion	The built-in Qwiic connector and additional 5V I2C port allow seamless connectivity to a wide range of sensors and actuators, including Modulino nodes.
Customizable feedback	Use the programmable RGB LED to indicate system states for faster debugging and smarter user interaction.
Flexible, familiar platform	Enjoy Arduino’s rich ecosystem, intuitive development environment, and robust community support.

Application Examples to Explore

Embedded industrial systems	Thanks to its compact design and production-ready features, the Nano R4 is ideal for creating embedded industrial solutions where space is limited but reliability is critical.
Home automation	With easy sensor and actuator integration, the Nano R4 enables fast development of connected and smart products that make your daily life easier.
Prototypes scaling to production	By carrying forward the RA4M1 microcontroller already featured in the UNO R4 family, the Nano R4 allows developers to prototype advanced edge computing projects and transition them into compact production designs with minimal rework.
Compact robotics and automation projects	The Nano R4’s small footprint and robust connectivity options make it perfect for miniaturized robotics, autonomous devices, and automated industrial systems requiring reliable, flexible control.
Custom hardware platforms	For designers seeking hardware customization without starting from scratch, the Nano R4’s castellated design simplifies integration into bespoke PCBs for specialized products in industrial, commercial, or consumer sectors.

Tech Specs

Board	Name	Arduino® Nano R4
	SKU	ABX00142
Microcontroller	Renesas RA4M1 (Arm® Cortex®-M4)
USB	USB-C®	Programming Port
Pins	Digital I/O Pins	21 (all exposed I/O can be used as digital I/O pins)
	Analog input pins	8
	DAC	1
	PWM pins	6
	External interrupts	2, 3
	Misc	DAC – A0
	OpAmp	A1, A2, A3
	VRTC	J5
Communication	UART	1
	I2C	2 (5V: A4, A5 / 3.3V: Qwiic, J3, J4)
	SPI	1
	CAN	1
Power	Circuit operating voltage	+5 VDC
	Input voltage (VIN)	+6–21 VDC
	DC Current per I/O Pin	8 mA
Clock Speed	Main core	48 MHz
Memory (RA4M1)	Flash	256 kB
	RAM	32 kB
	EEPROM	8 kB
Dimensions	Width	18 mm
Dimensions	Length	45 mm

FAQs

Is my sketch for the Arduino UNO R4 Minima compatible with the Arduino Nano R4?
Yes, your sketch for the UNO R4 Minima is compatible with the Nano R4. However, you will need to adjust the sketch to align with the Nano R4's pinout.

Can I use hardware compatible with the Arduino Nano (A000005) with the Arduino Nano R4?
Yes, the Arduino Nano R4 was specifically designed to ensure compatibility with previous shields and compatible hardware developed for the Arduino Nano. The Nano R4 maintains the same pinout and electrical compatibility, allowing you to seamlessly use your existing shields and hardware with the new board. This makes it easy to upgrade to the Nano R4 without the need for significant changes or adaptations to your projects.

Can I use my sketch developed for the Arduino Nano (A000005) in the Nano R4?
Yes, if your sketch was developed using the Arduino API. In case you are using instructions only available for the AVR architecture, some changes need to be made to ensure compatibility.

Conformities

The following Declarations of Conformities have been granted for this board:

For any further information about our certifications please visit docs.arduino.cc/certifications

Documentation

Datasheet

Arduino Docs

Arduino | Official Page

Arduino Nano R4

Arduino UNO EK R4 Minima (ABX00080_IN)