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 ATMEGA16U2 with USB Cable Compatible with Arduino IDE Projects RoHS Compliant

Product ID: 254187770

Details

Brand
ELEGOO
CPU model
Cortex A8
Installed RAM memory size
32 KB
Memory storage capacity
32 KB
Model name
ELEGOO UNO R3

⚡16MHz clock speed for lightning-fast processing

💾32KB flash memory for robust project storage

🔌Supports 7-12V DC input for versatile power options

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Description

🚀 Elevate your DIY game with ELEGOO UNO R3 – where speed meets stability!

POWER FLEXIBILITY - Supports 5V USB and 7-12V DC inputs, with recommended 9V1A for rock-solid stability.
FUTURE PROOF DESIGN - Extra IOREF and reserved pins enable compatibility with the latest Arduino shields and expansions.
USER FRIENDLY WIRING - Clearly labeled I/O pins on female headers make prototyping faster and error-free.
BLAZING FAST MICROCONTROLLER - ATmega328P chip delivers smooth, high-speed performance for complex Arduino projects.
PLUG PLAY USB CONNECTIVITY - ATMega16U2 serial interface ensures seamless, reliable USB communication with your PC.

The ELEGOO UNO R3 Board is a high-quality, Arduino IDE-compatible development board featuring an ATmega328P microcontroller and ATMega16U2 USB interface chip. It supports versatile power inputs (5V USB and 7-12V DC), includes 14 digital I/O pins, 8 analog inputs, and 32KB flash memory, all running at 16MHz clock speed. Designed for both beginners and pros, it offers clear pin labeling and future-ready IOREF pins, ensuring seamless integration with existing and upcoming Arduino shields. RoHS compliant and backed by strong user reviews, this board is a reliable, cost-effective choice for fast, stable prototyping and development.

Specifications

ASIN	B01EWOE0UU
Are Batteries Included	No
Best Sellers Rank	#73,596 in Computers ( See Top 100 in Computers ) #1,061 in Single-Board Computers
Brand	ELEGOO
Color	Black
Computer Memory Type	72-Pin EDO SIMM Memory
Customer Reviews	4.7 4.7 out of 5 stars (4,805)
Date First Available	7 October 2016
Graphics Card Description	Integrated
Graphics RAM Type	DDR DRAM
Hard Disk Description	HDD
Hard Drive Interface	ATA-4
Item Weight	27.2 g
Item model number	EL-CB-001
Manufacturer	Elegoo
Memory Technology	SRAM
Operating System	Windows 10
Optical Drive Type	BD-R
Processor Brand	Atmel
Processor Count	1
Processor Speed	0.02 GHz
Processor Type	Cortex A8
Product Dimensions	8 x 5.99 x 0.99 cm; 27.22 g
RAM Size	2 KB
Series	ELEGOO UNO R3 Board
Standing screen display size	3
Wireless Type	Bluetooth

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₨17195

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In stock

Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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