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.

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ELEGOO UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino

ELEGOO UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino

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

🔌100% Arduino IDE compatibility

🧩ATmega328P processor, Arduino-standard

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VT6432

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Details

Brand
ELEGOO
Connectivity Technology
USB
Memory Storage Capacity
32 KB

Description

🚀 Elevate your maker game with ELEGOO UNO R3 — where pro speed meets plug-and-play ease!

PRO GRADE RELIABILITY - Trusted by makers and pros alike for CNC and robotics projects with zero downtime.
BLAZING FAST USB TRANSFERS - Upgraded 16U2 chip delivers rapid, reliable data flow for seamless coding sessions.
COMPACT LIGHTWEIGHT DESIGN - Sleek 3.15" x 2.36" footprint fits perfectly into any workspace or project enclosure.
PRECISION ENGINEERED CONNECTORS - Clear-labeled female headers make wiring effortless and error-free every time.
PLUG PLAY ARDUINO COMPATIBILITY - Works flawlessly with Arduino IDE—no driver headaches, just pure productivity.

The ELEGOO UNO R3 Board features an ATmega328P microcontroller and an upgraded 16U2 USB interface chip, ensuring faster data transfer and enhanced memory. Fully compatible with the Arduino IDE, it offers clear female header labeling for precise wiring and is RoHS compliant. Lightweight and compact, this board is a reliable, cost-effective choice for professional-grade electronics projects and rapid prototyping.

Specifications

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VT6432

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered 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 Vanuatu.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews