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 | Compatible with Arduino IDE Projects, 32KB Flash Memory, 16Mhz Clock Speed, 14 Digital I/O Pins, RoHS Compliant

ELEGOO 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 lightning-fast processing

🔌USB 16U2 chip for rapid data transfer

🔢14 digital I/O pins for versatile connectivity

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Description

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

FUTURE READY PIN LAYOUT - Includes IOREF and reserved pins to support next-gen shields and expansions.
ENHANCED USB COMMUNICATION - Upgraded 16U2 chip ensures faster, more reliable data transfer to your PC.
ROBUST A TMEGA 328 P MICROCONTROLLER - Power your innovations with a trusted 32KB flash memory and 16MHz clock speed.
PRECISION ENGINEERING COMPLIANCE - Clear female headers and RoHS certification for safe, professional-grade builds.
SEAMLESS ARDUINO IDE COMPATIBILITY - Plug-and-play with all Arduino projects and shields for effortless prototyping.

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, enhanced USB communication via a 16U2 chip, and a future-proof pin layout, all housed in a RoHS-compliant design. Perfect for professional-grade prototyping and seamless integration with Arduino IDE projects.

Specifications

Asin	B01EWOE0UU
Best Sellers Rank	#7 in Single Board Computers (Computers & Accessories)
Date First Available	April 28, 2016
Is Discontinued By Manufacturer	No
Item Model Number	EL-CB-001
Item Weight	0.96 ounces
Manufacturer	ELEGOO
Product Dimensions	3.15 x 2.36 x 0.39 inches

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E£ 2810

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In stock

Sold byAmazon EGYPTDelivered 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 EGYPT.

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