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

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

⚡16MHz high-speed clock

🔌USB 16U2 chip for faster data transfer

🧩14 versatile digital I/O pins

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Description

🚀 Elevate your maker game with ELEGOO UNO R3 — where speed meets precision!

ECO FRIENDLY RELIABLE - RoHS compliant design that meets professional standards and sustainability goals.
LIGHTNING FAST DATA TRANSFER - Upgraded 16U2 USB chip ensures rapid and stable communication.
PRECISION ENGINEERED CONNECTORS - Clear female header prints for easy wiring and flawless prototyping.
ROBUST A TMEGA 328 P MICROCONTROLLER - Power your projects with the trusted 32KB flash memory and 16MHz clock speed.
SEAMLESS ARDUINO IDE COMPATIBILITY - Plug-and-play with 100% Arduino IDE support for effortless coding.

The ELEGOO UNO R3 Board is a professional-grade Arduino-compatible development board featuring the ATmega328P microcontroller with 32KB flash memory and a 16MHz clock. 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 is designed for seamless prototyping and reliable performance in all your electronics projects.

Specifications

ASIN	B01EWOE0UU
Best Sellers Rank	#12 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

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MX$869

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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