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 ATMEGA16U2 with USB Cable Compatible with Arduino IDE Projects RoHS Compliant

ELEGOO 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

🔌Dual power input: USB 5V & 7-12V DC for versatile projects

🛡️PTC resettable fuse for robust short-circuit protection

476 DH

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Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Elevate your DIY game with ELEGOO UNO R3 — where speed meets safety in every project!

BUILT IN SAFETY FIRST - Integrated PTC resettable fuse guards your board against wiring mishaps, ensuring your innovation stays protected and uninterrupted.
VERSATILE POWER OPTIONS - Supports USB 5V and 7-12V DC inputs, with recommended 9V1A for stable, uninterrupted operation on all your creative builds.
SMART WIRING MADE SIMPLE - Clearly labeled I/O interface pins on the female header connectors eliminate guesswork, accelerating your wiring and debugging process.
BLAZING FAST MICROCONTROLLER - ATmega328P chip delivers smooth, efficient performance at 16MHz clock speed, powering your projects with speed and reliability.
SEAMLESS ARDUINO IDE COMPATIBILITY - Plug-and-play with Arduino IDE for effortless coding and rapid prototyping—join the global maker movement with ease.

The ELEGOO UNO R3 Board features an ATmega328P microcontroller and ATmega16U2 USB interface chip, delivering 16MHz processing speed and 32KB flash memory. Compatible with Arduino IDE, it supports USB 5V and 7-12V DC power inputs, includes a PTC resettable fuse for short-circuit protection, and has clearly labeled I/O pins for easy wiring. RoHS compliant and lightweight, it’s the perfect development board for professional-grade prototyping and hobbyist projects alike.

Specifications

ASIN	B01EWOE0UU
Are Batteries Included	No
Best Sellers Rank	#85,375 in Computers ( See Top 100 in Computers ) #1,307 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 (4,817)
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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476 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered 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 Morocco.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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