Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Microcontroller | Renesas RA4M1 (ARM Cortex-M4) |
| Operating Voltage | 5V |
| Input Voltage (Recommended) | 7-12V |
| Digital I/O Pins | 14 (6 PWM outputs) |
| Analog Input Pins | 6 |
| Flash Memory | 256 KB |
| SRAM | 32 KB |
| Clock Speed | 48 MHz |
| Connectivity | USB-C, WiFi (WiFi version only) |
| Dimensions | 68.6 x 53.4 mm |
Anonymous
Mar 31, 2026
Rating: 4/5
Great board, WiFi setup takes patience
The Minima version is solid, but I bought the WiFi version expecting instant connectivity. While the hardware is excellent, getting the WiFi libraries configured took some troubleshooting. Once working, it's very stable for IoT projects.
Anonymous
Mar 24, 2026
Rating: 5/5
Smooth transition for legacy code
I was worried my old sketches wouldn't compile, but the Arduino IDE handled the migration seamlessly. The 48MHz clock speed makes real-time data logging much smoother. No lag whatsoever.
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for university labs
We ordered twenty of these for our introductory robotics course. The USB-C port is a welcome change, and the backward compatibility with most shields means we didn't have to replace our existing inventory. Students love the increased processing power.
Anonymous
Mar 16, 2026
Rating: 5/5
Huge upgrade from the classic UNO
The switch to the ARM Cortex-M4 processor makes this board significantly faster than the old ATmega328P models. The extra memory allows for much more complex projects without running out of space. Highly recommended for anyone looking to step up their embedded game.
Anonymous
Mar 10, 2026
Rating: 5/5
Best value for WiFi projects
Compared to buying a separate ESP module and an UNO, this all-in-one solution saves so much breadboard space. The built-in WiFi is robust and the power management seems improved over previous generations.
Anonymous
Mar 03, 2026
Rating: 4/5
Powerful but documentation could be better
This is my first ARM-based Arduino. It's incredibly fast, but some of the advanced peripheral features aren't as well documented as the older boards yet. Still, for standard GPIO and PWM tasks, it works flawlessly.
Q: Does this support 3.3V logic levels?
A: The board operates at 5V logic levels like the classic UNO. While it has a 3.3V output pin for powering sensors, the I/O pins are 5V tolerant but not native 3.3V logic. Use a level shifter for strict 3.3V devices.
Q: Is this board compatible with existing Arduino UNO shields?
A: Yes, the UNO R4 maintains the same form factor and pinout as previous UNO boards, making it compatible with most standard shields. However, always check voltage requirements for specific sensors.
Q: What is the difference between the Minima and WiFi versions?
A: The hardware core is identical. The WiFi version includes an integrated ESP32-S3 module for wireless connectivity, while the Minima version does not have built-in wireless capabilities.
Q: Which IDE version do I need to program the R4?
A: You need Arduino IDE 2.0 or later, or the web editor, with the appropriate 'Arduino Renesas Boards' package installed via the Board Manager.
Q: Can I power this board via the USB-C port?
A: Absolutely. The UNO R4 series uses USB-C for both programming and power supply. It can also be powered via the barrel jack or the VIN pin.
Used Car Tires 185 195 205 215 235/55 60 70R13 14 15 16 Random Tread Pattern
$57.80
Sponge Stamp Painting Tools Stamping Rods Kindergarten Children's Art Supplies Mushroom Head Sponge Brushes
$3.50
Croma Portable Pocket Watercolor Sketchbook - 300g Cold-Press Paper for Acrylic Markers, Pen & Wash, and Travel Sketching
$14.20
PLC Control Cabinet Explosion-Proof Variable Frequency Drive Panel for Constant Pressure Water Supply
$6,098.00
Beginner Watercolor Painting Book with Line Art for Coloring, Featuring Zodiac and Martial Arts Themes
$5.53
Compact Home Range Hood - Portable USB Desktop Smoke Extractor for Living Room Hot Pot and BBQ Odor Removal
$41.00
Rubens Watercolor Paper, Starry Sky Watercolor Pad, High Absorption, 32K/16K/8K, Thickened 300g, Medium/Fine Grain for Art Students
$6.42
Commercial Pasteurization Machine for Fresh Milk Bars and Dairy Farms - Stirring and Preservation Tanks (Large and Small Sizes Available)
$3,185.00
Handcrafted Sheepskin Rattle & Peach Wood Shaker - Pure Copper Brass Bells, Vintage Wooden Toy Safe for Infant Chewing
$31.50
RIDE ON TIME Tatsuro Yamashita Mr. Fuki Saxophone Trio Accurate Transcription Service
$34.00
Metal Unveiling Stand for Ribbon-Cutting Ceremonies - Vertical Display Rack for Grand Openings, Advertising Signs, and Plaques
$159.00
Children's Art Supplies Round Sponge Brush Painting Graffiti Tool Mushroom Head Stamp Kindergarten DIY Rubbing Art
$2.45
Weak Alkaline Water Equipment Wahaha 9.0 Soda Water Small Molecule Water Stable Storage for 24 Months Electrolysis Water Maker
$20,160.00
RefComp Snowman Italy Refcon Low-Temperature Cold Storage Semi-Hermetic Unit SP2L 0600 (55㎡ Dual)
$7,200.00
Compact Home Range Hood - Portable USB Desktop Smoke Extractor for Living Room Hot Pot and BBQ Odor Removal
$39.00
IoT Leakage Circuit Breaker with Remote Control via EasyLink, Featuring Metering and Protection
$510.75
Mia Art Quick-Absorb Sponge for Watercolor Painting - Soft, Durable, Brush-Safe Cleaning and Blending Tool for Students
$4.25
Incense Burner Pad with Fire-Resistant Cotton - High-Temperature Resistant, Heat-Proof, Home Use, Round Insulating Flame-Retardant Mat for Incense Boxes and Aromatherapy
$3.29
Quilt Storage Bag for Clothes, Cotton Quilts, and Down Jackets - Large Capacity Moving Luggage Compression Organizer
$11.80
Welding Fume Purifier – Effective Dust Collection and Control
$15,740.00
Discount Cocktail Bun and Sausage Bun Electric Heated Display Cabinet for Egg Tarts and Roasted Sweet Potatoes
$7,633.00
Paint Brush Cleaner with Suction Pump for Watercolor, Gouache, and Acrylics - Essential Tool for Artists
$14.80
Anserui Portable Tire Stone Removal Hook - Multi-Function Car Tire Cleaning Tool
$23.32
New 420D Oxford Cloth Black Outdoor Leaf Blower Vacuum Bag, Yard Debris Collection and Storage Bag
$26.00
RoHS Environmental Protection Tester for Electronic Component Solder Joints and PCB Lead/Heavy Metal Detection
$6,580.00
![[Blueberry Midsummer] Qianmu Original Pastoral Lolita Daily JSK Dress, Full Length](https://www.gosteppe.com/cache/small/product/269777/legacy-main-555e8a83b64390f8a24c4ff4.webp)
[Blueberry Midsummer] Qianmu Original Pastoral Lolita Daily JSK Dress, Full Length
$128.00
Watercolor Coloring Line Art Paper - Gourmet Theme Cotton Pulp Sketchbook for Tracing and Creativity
$12.80
Industrial Boiler Oxygen-Enriched Combustion System - Technical Specs for Industrial Oxygen Generators
$1,135,199.00
Tanker Truck and Modified Trailer Rear Axle Tires - 445/65R22.5, 425/65R22.5, 385/65R22.5
$1,500.00
Ancient Craft Mini Peach Wood Rattle Drum Traditional Intangible Cultural Heritage Custom Handmade Toy for Infants
$198.00
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
