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Description
ARDUINO UNO REV 4 WIFIThe Arduino UNO R4 WiFi Merges the Renesas RA4M1 Microprocessor with the ESPRESSIF ESP32 S3, Creating an all in one tool for makers with enhanced processing power and a diverse array of new peripherals. With its built in WI FI and Bluetooth capabilities Arduino UNO R4 WiFi Overview The Arduino UNO R4 WiFi combines the processing power and exciting new peripherals of the RA4M1 microcontroller from Renesas with the wireless connectivity power of the
The Arduino UNO R4 WiFi Merges the Renesas RA4M1 Microprocessor with the ESPRESSIF ESP32-S3, Creating an all-in-one tool for makers with enhanced processing power and a diverse array of new peripherals. With its built-in WI-FI® and Bluetooth® capabilities
Arduino UNO R4 WiFi
Overview
The Arduino UNO R4 WiFi combines the processing power and exciting new peripherals of the RA4M1 microcontroller from Renesas with the wireless connectivity power of the ESP32-S3 from Espressif. On top of this, the UNO R4 WiFi offers an on-board 12x8 LED matrix, Qwiic connector, VRTC, and OFF pin, covering all potential needs makers will have for their next project.
With the UNO R4 WiFi, you can easily upgrade your project and add wireless connectivity to expand the reach of your current setup. If this is your first project, this board has everything you need to spark your creativity.
Features
- Hardware compatibility with UNO form factor: The UNO R4 WiFi maintains the same form factor, pinout, and 5 V operating voltage as its predecessor, the UNO R3, ensuring a seamless transition for existing shields and projects.
- Expanded memory and faster clock: The UNO R4 WiFi boasts increased memory and a faster clock speed, enabling more precise calculations and effortless handling of complex projects.
- Extra on-board peripherals: The UNO R4 WiFi introduces a range of on-board peripherals, including a 12-bit DAC, CAN BUS, and OP AMP, providing expanded capabilities and design flexibility.
- Extended 24 V tolerance: The UNO R4 WiFi supports a wider input voltage range, allowing seamless integration with motors, LED strips, and other actuators using a single power source.
- HID support: With built-in HID support, the UNO R4 WiFi can simulate a mouse or keyboard when connected to a computer via USB, making it easy to send keystrokes and mouse movements.
- Wi-Fi® and Bluetooth®: The UNO R4 WiFi hosts an ESP32-S3 module, enabling makers to add wireless connectivity to their projects. Combined with the Arduino IoT Cloud, makers can monitor and control their projects remotely.
- Qwiic connector: The UNO R4 WiFi features a Qwiic I2C connector, allowing easy connection to nodes from the extensive Qwiic ecosystem. Adapter cables also enable compatibility with sensors and actuators based on other connectors.
- Support for battery-powered RTC: The UNO R4 WiFi includes additional pins, including an "OFF" pin to turn off the board and a "VRTC" pin to keep the internal Real-Time Clock powered and running.
- LED matrix: The UNO R4 WiFi incorporates a bright 12x8 red LED matrix, ideal for creative projects with animations or plotting sensor data, eliminating the need for additional hardware.
- Diagnostics for runtime errors: The UNO R4 WiFi includes an error-catching mechanism that detects runtime crashes and provides detailed explanations and hints about the code line causing the crash.
Specifications
| Microcontroller | Renesas RA4M1 (Arm® Cortex®-M4) | |
| USB | USB-C® | Programming Port |
| Pins | Digital I/O Pins | 14 |
| Pins | Analog input pins | 6 |
| DAC | 1 | |
| PWM pins | 6 | |
| Communication | UART | Yes, 1x |
| I2C | Yes, 1x | |
| SPI | Yes, 1x | |
| CAN | Yes 1 CAN Bus | |
| Power | Circuit operating voltage | 5 V (ESP32-S3 is 3.3 V) |
| Input voltage (VIN) | 6-24 V | |
| DC Current per I/O Pin | 8 mA | |
| Clock speed | Main core | 48 MHz |
| ESP32-S3 | up to 240 MHz | |
| Memory | RA4M1 | 256 kB Flash, 32 kB RAM |
| ESP32-S3 | 384 kB ROM, 512 kB SRAM | |
| Dimensions | Width | 68.85 mm |
| Length | 53.34 mm | |
Additional Information
| Device | UNO R4 WiFi |
Shipping Notes
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4.5 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
The Best Cable Management Solution for IT Work — Reusable, Reliable, and Professional
Size: 150Pk - 8" x 1/2", Style: Cord Wrap Cable Ties, Color: Black and Gray
TL;DR: I’ve been using these VELCRO Brand cable ties for years as an IT field tech. They hold tight, are endlessly reusable, and keep cables tidy. Great for both home and professional setups.
Full Review:
As an IT field technician, I’ve tried countless ways to keep cables organized, and these VELCRO Brand cable ties are simply the best. They’re reusable, strong, and easy to reposition — ideal for network racks, AV installs, or just cleaning up cords around the house.
Functionality:
Top-notch. The hook-and-loop material is aggressive enough to hold firmly, but not so sticky that it clings to everything else in your tool bag. They wrap cleanly, stay put, and release easily when you need to re-route cables. They’re reliable enough for professional jobs and flexible enough for home use.
Storage Capacity:
Each strap holds more than you’d expect — I rarely need to link two together. They handle thick cable bundles or power cords just fine on their own. And when I do need more length, it’s easy to join a second strap for a larger wrap.
The two-color mix (black and gray) is great for keeping different cable types separated — for instance, network vs. power. The thin profile also helps keep bundles neat and professional-looking.
These have earned me plenty of compliments from higher-ups for clean cable runs and well-organized setups. Once you switch to these, you’ll never want to deal with cutting zip ties again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2025
★★★★★ 5
VELCRO Ties Are the Standard to Rely On
Size: 150Pk - 8" x 1/2", Style: Cord Wrap Cable Ties, Color: Black and Gray
I am a big fan of VELCRO brand products because of their quality and utility. I have used their rolls of Velcro hook and loop tape as well as their little patches, and I became a brand loyalist. Yes, there are many other manufacturers, but these are certainly as good as it gets. This product is your very basic, very thin, and very copious supply (for my neighbors in Rio Linda - that means plenty of them). You get two big spools of these little eight (8) inch ties that are adhesive throughout their length - that means you can tie the smallest cables to anything almost up to their full length. If you need a longer wrap - use more than one and just extend the length by piggy backing them. The real advantage of this bulk package is that you are not tempted to save some for later - you have enough to use as many as you like and can happily go tie crazy on all your cords! It's VELCRO party time. We live in an electronic age, and I have a lot of more pricey hook-and-loop specialty ties, and I try to keep a few back as spares. Forget that - with these little ties, I can actually use them and do what I need to get those tangled cords in shape. O.K. maybe I am a geek, but I cook my chicken - dead already, and I believe in independent segregated wiring and not tripping over things or spending time untangling messes when I need to move gear. These big rolls will make your life easier - I use them to attach notes to little jars or vials - to tie two gloves together when I am not wearing them - and other uses even cutting them into smaller pieces. That's one of the advantages of these bulk spools - lots of supply. Yes, the individual ties are dinky thin little things, but they hold very well (why you buy genuine VELCRO) and you don't feel stupid using them up on anything you feel like. They are expendable, and that adds to their ultimate utility. Darned useful product. Buy it - use it; enjoy.
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Reviewed in the United States on February 17, 2024
★★★★★ 5
Computers, electronics cabling? You NEED these!
Size: 100Pk - 6” x ½”, Style: Cord Wrap Cable Ties, Color: Black
If you do any cabling, be it TV or computer or anything else, these ARE worth there weight in gold. Seriously! They'll keep your cable runs, extension cords, etc in a nice neat easy to work with bundle that you can have out of the way. Adhesion is very good also which is also important. Just the right size for most applications and if you need something large they make them to fit your needs. Cable management has always been a pet peeve of mine and makes a difference that not only shows but makes future work and maintenance much easier. Whenever I see a rat's nest cluster of wires I always know it means shoddy workmanship!
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Reviewed in the United States on May 9, 2026
★★★★★ 4
Very Effective, but Not the Instructions
Size: 150Pk - 8" x 1/2", Style: Cord Wrap Cable Ties, Color: Black and Gray
These work very well, but when you remove them from the box, you see two donuts, one grey, one black, of 75 tightly wrapped cable ties each. So far, so good.
First deficiency: The "how to use" pictures---three of them---are tiny light line drawings in 7/16" x 7/16" boxes. If you don't have a 400-power microscope, maybe a magnifying glass will do. Maybe Velcro---a "name" brand that should know better---thinks that the use of these devices is obvious. Well, "obvious" is obvious only when it's obvious, and that can vary from person to person. They should assume nothing.
Second deficiency: Before trying (and, one hopes, succeeding) at using these ties, one must determine exactly now to remove the first tie from the outside of either donut. Obvious? No, not really, because, as it turned out, it requires some effort to remove the first one---the placement and circumstances of which do not at all (not on my set of these, anyway) suggest in any concrete way which one should be taken first. No one wants to tear up a couple of ties just to figure out how not to tear up ties by removing them incorrectly or out of order.
The punishment here is four stars that could have been five.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Must Have for Cable Management.
Size: 100Pk - 6” x ½”, Style: Cord Wrap Cable Ties, Color: Black
Best Velcro out the. Great for cable management. Super easy to use. Cannot be beat for the price. Incredibly useful.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
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