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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UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino | Compatible with Arduino IDE Projects, 32KB Flash Memory, 16Mhz Clock Speed, 14 Digital I/O Pins, 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

⚡16MHz clock speed for smooth performance

🔌USB 16U2 chip for faster data transfer

🧩14 Digital I/O pins for versatile connectivity

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Description

🚀 Elevate your maker game with ELEGOO UNO R3 – where precision meets power!

ECO FRIENDLY RELIABLE - RoHS compliant design that meets professional standards and sustainability goals.
PRECISION FEMALE HEADERS - Clear, precise connectors make wiring intuitive and error-free.
ENHANCED USB COMMUNICATION - Upgraded 16U2 chip ensures faster, stable data transfer and programming.
ROBUST A TMEGA 328 P MICROCONTROLLER - Power your projects with the trusted 32KB flash memory and 16MHz speed.
SEAMLESS ARDUINO IDE COMPATIBILITY - Plug-and-play with 100% Arduino IDE support for effortless coding.

The ELEGOO UNO R3 Board is a high-performance Arduino-compatible development board featuring an ATmega328P microcontroller with 32KB flash memory and a 16MHz clock speed. It includes 14 digital I/O pins and an upgraded 16U2 USB chip for faster data transfer. Fully compatible with the Arduino IDE and RoHS compliant, this compact board (3.15 x 2.36 x 0.39 inches) is designed for seamless prototyping and professional-grade electronics projects.

Specifications

ASIN	B01EWOE0UU
Best Sellers Rank	#9 in Single Board Computers (Computers & Accessories)
Date First Available	April 28, 2016
Item Weight	0.96 ounces
Item model number	EL-CB-001
Manufacturer	ELEGOO
Product Dimensions	3.15 x 2.36 x 0.39 inches

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$35.82

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered 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 British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

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

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