Is this the same thing as an arduino?

Arduino is just a specification for a microcontroller. Although there is an official "Arduino Brand" this model does 100% of what that model does for $5 less. I have a kit that connects every GPIO pin of Arduino, and it connected fine. So for all intents and purposes, this is "the same thing as an arduino."

Ordered two of these and get the same error message: avrdude: ser_open() : can't open device "\\.\COM4": the system cannot find the file specified.

When this happens, I've fixed it by closing the Arduino IDE, unplugging my USB cable from the UNO, plugging it back in, and restarting the IDE. (Save the file before closing the IDE, if desired.) This has always corrected the issue for me, even when the IDE shows an Arduino on COM4 and it's selected yet still seems unavailable.

Does this use the CH340 ?

No. And no. He wants to know the USB chip, not the MCU chip. The USB chip is a CP2021 or whatever, it isn't the CH340.

is the Elegoo compatible with the official Arduino program? (1.8.1 to be exact)

While I have not updated to 1.8.1 yet, I have used it with previous versions with no issues, so I see no reason why it should not work with the latest. I have used 3rd party programs and libraries as well.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino | Compatible with Arduino IDE Projects, RoHS Compliant

Product ID: 27763963

Details

Brand
ELEGOO
Connectivity Technology
USB
Memory Storage Capacity
32 KB
Model Name
ELEGOO UNO R3
Ram Memory Installed Size
32 KB

⚡16U2 chip for faster USB transfer

🔌Full Arduino IDE compatibility

🛠️ATmega328P MCU for reliable control

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 33.69

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Description

⚡ Power Your Ideas with ELEGOO UNO R3 – The Fast Lane to Maker Fame!

TRUSTED A TMEGA 328 P CORE - Powered by the same MCU as the official Arduino UNO R3, guaranteeing rock-solid performance.
ECO FRIENDLY CERTIFIED - RoHS compliant, so you build smarter and greener—because innovation should be responsible.
PRECISION FEMALE HEADERS - Clear, labeled connectors make wiring effortless and error-free, perfect for rapid prototyping.
BLAZING FAST USB TRANSFERS - Upgraded 16U2 chip ensures lightning-speed data communication, slashing your upload times.
PLUG PLAY ARDUINO IDE READY - Seamlessly integrates with Arduino IDE for instant project kickoffs—no hassle, just code.

The ELEGOO UNO R3 Board is a high-performance, Arduino-compatible development board featuring the reliable ATmega328P microcontroller and an upgraded 16U2 USB interface chip for faster data transfer. Fully compatible with the Arduino IDE and RoHS certified, it offers clear female header connectors for easy wiring, making it the perfect choice for professional-grade prototyping and creative projects.

Specifications

ASIN	B01EWOE0UU
Best Sellers Rank	#10 in Single Board Computers (Computers & Accessories)
Date First Available	April 28, 2016
Is Discontinued By Manufacturer	No
Item Weight	0.96 ounces
Item model number	EL-CB-001
Manufacturer	ELEGOO
Product Dimensions	3.15 x 2.36 x 0.39 inches

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 33.69

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews