# Meet the Arduino Nano R4: Why Is This Tiny Upgrade So Big for Makers? Explore the Arduino Nano R4 with our complete guide. Discover the Nano R4 pinout diagram, specs, features, and how it compares to the Nano Every. Written by [Jharwin Barrozo](https://flux.seobdtools.com/jharwinbarrozo) Published Oct 2026 - 6 min read [![](https://flux.seobdtools.com/p/assets/blogs/arduino-nano-r4/main.webp)](#) ## Arduino’s latest launch, the **Arduino Nano R4**, is a powerful new upgrade to the beloved Nano family, bringing the impressive capabilities of the UNO R4 into a small, versatile package. But what exactly makes it stand out, and why should makers and professionals care? ## Let's dive into everything you need to know about the Nano R4. ### What Exactly is the Arduino Nano R4? The Arduino Nano R4 is a significant upgrade to Arduino’s popular Nano line, powered by the **Renesas RA4M1** microcontroller. Imagine taking the powerful brains of the Arduino UNO R4 and shrinking them into a tiny, versatile form. With a 48 MHz Arm Cortex-M4F core, 256 KB of flash storage, and integrated EEPROM, the Nano R4 provides remarkable performance in a miniature footprint. Regardless of whether you're prototyping, building IoT projects, or designing space-conscious hardware, the Nano R4 is designed to streamline your workflow and empower your creativity. [![Front view and back view of the new Arduino Nano R4](https://flux.seobdtools.com/p/assets/blogs/arduino-nano-r4/nano-r4-front-and-back.webp)](#) ### What's New in the Arduino Nano R4? The Nano R4 offers  exciting new features, making it one of Arduino’s most attractive small boards ever released: - **Enhanced Processing Power**: 48 MHz Arm Cortex-M4F MCU (Renesas RA4M1). - **Expanded Memory**: 256 KB Flash, 32 KB SRAM, and 8 KB EEPROM. - **Compact & Production-Friendly**: Single-sided component placement and castellated headers for easy PCB integration. - **Versatile Connectivity**: USB-C, built-in 3.3V Qwiic I²C connector, additional 5V I²C compatibility, UART, SPI, PWM, DAC, and CAN bus support. - **Real-Time Clock (RTC)**: An integrated RTC with battery backup capability for accurate timekeeping. - **RGB LED Indicator**: Onboard LED for debugging, feedback, or user-interface enhancements. ### Looking to Fast-Track Your Arduino Hardware Design? Browse the shield templates below, each pre-aligned with headers, that let hardware engineers move from concept to working prototype in record time. Choose a template, customize it to your needs, and start building. 1. [Arduino MKR Wifi Template](https://flux.seobdtools.com/vasyl/arduino-mkr-wifi-1010-template) 2. [Arduino Nano 33 Template](https://flux.seobdtools.com/vasyl/abx00027-template) 3. [Arduino MKR Zero Template](https://flux.seobdtools.com/vasyl/arduino-mkr-zero-template) 4. [Arduino Nano RP2040 Template](https://flux.seobdtools.com/jharwinbarrozo/arduino-nano-rp2040-connect-template) ### Discover Featured Projects A curated collection of PCB and hardware projects crafted by our talented Flux community. [ explore MORE projects ](https://flux.seobdtools.com/p/projects) ### Can I run my UNO R4 Minima sketch on a Nano R4? The Arduino Nano R4 keeps the classic Nano pin layout, so headers, shields, and breadboard wiring stay the same. The Nano R4 pinout diagram is detailed below: [![Arduino Nano R4 pinout mapping](https://flux.seobdtools.com/p/assets/blogs/arduino-nano-r4/arduino-nano-r4-pin-out.webp)](#) #### Analog (JP1) | Pin | Function | Type | Description | | --- | --- | --- | --- | | 1 | D13 / SCK | Digital | Serial Clock | | 2 | +3V3 | Power Out | +3V3 Power Rail | | 3 | B0 / AREF | Analog | Analog Reference | | 4 | A0 | Analog | Analog input 0 / DAC | | 5 | A1 | Analog | Analog input 1 / OPAMP + | | 6 | A2 | Analog | Analog input 2 / OPAMP – | | 7 | A3 | Analog | Analog input 3 / OPAMP Out | | 8 | A4 | Analog | Analog input 4 / I²C Serial Data (SDA) | | 9 | A5 | Analog | Analog input 5 / I²C Serial Clock (SCL) | | 10 | A6 | Analog | Analog input 6 | | 11 | A7 | Analog | Analog input 7 | | 12 | 5V | Power | USB power (5 V) | | 13 | BOOT1 | Mode | Board Reset 1 | | 14 | GND | Power | Ground | | 15 | VIN | Power | Voltage Input | #### Digital (JP2) | Pin | Function | Type | Description | | --- | --- | --- | --- | | 15 | D12 / CIPO | Digital | Controller In Peripheral Out | | 14 | D11 / COPI | Digital | Controller Out Peripheral In / PWM | | 13 | D10 / CS | Digital | Chip Select / PWM | | 12 | D9 | Digital | Digital pin 9 / PWM | | 11 | D8 | Digital | Digital pin 8 | | 10 | D7 | Digital | Digital pin 7 | | 9 | D6 | Digital | Digital pin 6 / PWM | | 8 | D5 | Digital | Digital pin 5 / PWM / CAN (RX) | | 7 | D4 | Digital | Digital pin 4 / CAN (TX) | | 6 | D3 | Digital | Digital pin 3 / PWM | | 5 | D2 | Digital | Digital pin 2 | | 4 | GND | Power | Ground | | 3 | RST | Internal | Reset (features a button) | | 2 | D0 / RX | Digital | Digital pin 0 / Serial Receiver (RX) | | 1 | D1 / TX | Digital | Digital pin 1 / Serial Transmitter (TX) | ### Why Does the Nano R4 Matter to Makers? #### ✅ **Compact Size, Big Performance** Nano R4 packs high-end functionality previously reserved for larger Arduino boards into a sleek, ultra-compact form factor. This allows makers to design more sophisticated, compact IoT and wearable projects without compromising power or features. #### ✅ **Seamless Transition from UNO R4** Already using Arduino’s popular UNO R4 boards? The Nano R4 offers complete compatibility with UNO R4’s software ecosystem, meaning your existing libraries, sketches, and workflows transfer smoothly to your Nano-sized projects. #### ✅ **Production Ready & Cost-Effective** The castellated headers and single-sided components ensure easy and cost-effective manufacturing—perfect for makers looking to transition prototypes into commercial products quickly and affordably. #### ✅ **Improved Connectivity and Expansion** The integrated Qwiic connector and additional I²C lines allow effortless integration of sensors, displays, and other peripherals. Add the RTC and RGB LED, and you have a remarkably versatile board ready for endless applications. ### Who Is the Arduino Nano R4 Designed For? The Nano R4 meets a variety of needs: - **Hobbyists & Students**: Easy-to-use and powerful enough to handle beginner and advanced projects alike. - **Product Developers**: Small, affordable, and production-ready for embedding into commercial hardware. - **Educators**: Compact form factor and compatibility with Arduino IDE make it ideal for teaching embedded systems, robotics, and IoT concepts. ### How Does Nano R4 Compare to Previous Arduino Boards? Compared to older Nano models (Nano Every or Nano 33), the Nano R4 offers substantial performance and memory improvements: | Feature | Arduino Nano R4 | Arduino Nano Every | Arduino Nano 33 IoT | | --- | --- | --- | --- | | Microcontroller | Renesas RA4M1 (32-bit) | ATmega4809 (8-bit) | SAMD21 Cortex-M0+ (32-bit) | | Clock Speed | 48 MHz | 20 MHz | 48 MHz | | Flash Memory | 256 KB | 48 KB | 256 KB | | SRAM | 32 KB | 6 KB | 32 KB | | EEPROM | 8 KB 256 bytes | None | | | RTC | ✅ Integrated | ❌ Not integrated | ❌ Not integrated | | Connectivity | USB-C, I²C, UART, SPI, CAN | Micro USB, UART, SPI, I²C | Micro USB, Wi-Fi, Bluetooth | | Form Factor | Nano-sized, castellated PCB | Nano-sized | Nano-sized | The Nano R4 brings many of the features previously only available in higher-end Arduino boards into a Nano-sized form factor. ## Why Should You Upgrade to the Arduino Nano R4? If you're currently using older Nano boards or even an Arduino UNO, here are quick reasons to make the jump to Nano R4: - **Power & Performance**: Significant upgrade with faster processing and more memory. - **Better Compatibility**: Simplified transition from UNO-based projects. - **Lower Cost & Easier Manufacturing**: Perfect for small-scale production or commercial projects. - **Versatile Applications**: Suitable for IoT, robotics, wearables, automation, and more. - **Future-Proof**: Modern features like USB-C, RTC, and expanded connectivity mean longer-lasting project relevance. ### Where Can You Get the Arduino Nano R4? The Arduino Nano R4 is available in two variations: - **Without Headers**: Ideal for embedding into custom PCB designs (around $12.10). - **With Pre-soldered Headers**: Ready for quick prototyping and breadboarding (around $13.30). Both versions are available directly from Arduino's online store and major electronics distributors. ### Ready to Start Your Nano R4 Project? Arduino’s Nano R4 sets a new standard for compact, powerful, and production-friendly microcontroller boards. Whether you’re prototyping the next big IoT device or scaling your prototype for production, the Nano R4 offers the power and flexibility you need. Visit our [Featured Projects](https://flux.seobdtools.com/p/projects?categories=arduino) page to discover innovative Arduino builds and spark inspiration for your next big idea. ### Discover Featured Projects A curated collection of PCB and hardware projects crafted by our talented Flux community. [ explore MORE projects ](https://flux.seobdtools.com/p/projects) ## About the author [Jharwin Barrozo](https://flux.seobdtools.com/jharwinbarrozo) Electronics Engineer at Flux Jharwin is an electronics engineer mainly focused on satellites. He built his own ground station using Flux to monitor RF activities on the International Space Station. Find him on Flux [@jharwinbarrozo](https://flux.ai/jharwinbarrozo) Let’s start building Build your big idea together with Flux. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. ![Close-up photo of a PCB made with Flux, with an ESP32 module, buttons, and a microSD slot.](https://flux.seobdtools.com/p/assets/blogs/miscellaneous/sidebar-cta-pcb.webp) [Try it Free](https://flux.seobdtools.com/signup) ## More in Component & Platform Guides [ ![A 3d model of arduino uno board](https://flux.seobdtools.com/p/assets/blogs/arduino-getting-started/main.webp) ### Arduino Uno Basics: Beginner's Guide to Getting Started 15 Min Read](https://flux.seobdtools.com/p/blog/arduino-uno-basics-beginners-guide-to-getting-started)[ ![ESP32 Board with its pinout label and diagram, each pin label and function on different colors](https://flux.seobdtools.com/p/assets/blogs/esp32-pinout/main.webp) ### ESP32 Pinout Guide: Everything You Need to Know 11 Min Read](https://flux.seobdtools.com/p/blog/esp32-pinout-everything-you-need-to-know)[ ![A raspberry pi 3B and zero boards laid out together showing graphical GPIO pinout](https://flux.seobdtools.com/p/assets/blogs/raspberry-pi-guide/main.webp) ### Raspberry Pi Pinouts: A Comprehensive Guide 8 Min Read](https://flux.seobdtools.com/p/blog/raspberry-pi-pinouts-a-comprehensive-guide)[ ![An arduino uno microcontroller board with its sketch code on Arduino IDE being used as background in a monitor.](https://flux.seobdtools.com/p/assets/blogs/arduino-code-guide/main.webp) ### Arduino Code for Beginners: How to Write Your First Sketch 8 Min Read](https://flux.seobdtools.com/p/blog/arduino-code-a-comprehensive-guide-for-beginners)[ ![A microcontroller board with the words Arduino Pro Micro on it.](https://flux.seobdtools.com/p/assets/blogs/arduino-pro-micro/main.webp) ### What is Arduino Pro Micro: a Comprehensive Introduction for Novices 5 Min Read](https://flux.seobdtools.com/p/blog/what-is-arduino-pro-micro-a-comprehensive-introduction-for-novices)[ ![Schematic diagram of arduino uno board with all of its passive and active components](https://flux.seobdtools.com/p/assets/blogs/arduino-uno-schematic-diagram/main.webp) ### Arduino Uno Schematic Diagram: A Comprehensive Guide 8 Min Read](https://flux.seobdtools.com/p/blog/arduino-uno-schematic-diagram)[ ![Side by side comparison of the 3 powerful and most common Arduino microcontroller boards; Arduino Mega 2560, Arduino Uno and Arduino Micro.](https://flux.seobdtools.com/p/assets/blogs/arduino-mega-uno-micro/main.webp) ### Arduino Mega vs. Uno vs. Micro: Key Differences 6 Min Read](https://flux.seobdtools.com/p/blog/what-is-the-real-difference-arduino-mega-vs-micro-vs-uno)[ ![Different packages or footprint of famous atmega328p microcontroller with its pinout](https://flux.seobdtools.com/p/assets/blogs/atmega328p-still-top-choice/main.webp) ### Why Atmega328p is Still a Top Choice for Microcontroller Projects in 2023 8 Min Read](https://flux.seobdtools.com/p/blog/why-atmega328p-is-still-a-top-choice-for-microcontroller-projects-in-2023)[ ![ESP32 Chip in a dark background: A powerful microcontroller with integrated Wi-Fi and Bluetooth, driving IoT innovation with seamless connectivity.](https://flux.seobdtools.com/p/assets/blogs/esp32-history/main.webp) ### Exploring ESP32: from History to Application 3 Min Read](https://flux.seobdtools.com/p/blog/exploring-esp32-from-history-to-application)[ ![3d rendered of an ESP8266 microcontroller board, showing its compact size with the Wi-Fi module, chip antenna, and GPIO pins clearly visible, ideal for embedding wireless internet connectivity into DIY electronics projects.](https://flux.seobdtools.com/p/assets/blogs/everything-about-esp8266/main.webp) ### ESP8266 Pinout Guide: Complete GPIO Reference & IoT Project Tips 10 Min Read](https://flux.seobdtools.com/p/blog/esp8266-pinout-everything-you-need-to-know)[ ![Attiny85 chip in two different packages viewed on top, also showing pinout diagram](https://flux.seobdtools.com/p/assets/blogs/attiny85/main.webp) ### Introduction to the ATtiny85 Microcontroller 12 Min Read](https://flux.seobdtools.com/p/blog/introduction-to-the-attiny85-microcontroller)[ ![STM32 microcontroller chip overview – Why choose STM32? 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Let’s build your idea together. All you need to do is describe what you want to make, or what problem you want to solve. Flux will work with you to make it a reality. [Try it Free](https://flux.seobdtools.com/signup) ![Close-up of a Flux-designed printed circuit board](https://flux.seobdtools.com/p/assets/homepage-v2/mission-visual.webp)