Does anyone know how to update the bootloader on these boards?

use the ATmega328p (old Bootloader) setting. works good for me

I am unable to upload a sketch to all 3 boards.. even when switching to old bootloader, are they bad boards?

I purchased 2 sets of 3ea LAFVIN boards assembled with headers and USB cables August 2020. Using Arduino IDE 1.8.5 could not upload sketch to Nano. Changed Tools->Board=Arduino/Genuino Uno and was able to upload sketch. The Nano thinks it is a Uno. I do not know if there are any other differences.

What voltage battery for these?

Variable. Can connect to USB via mini-USB connecor. Higher voltages up to 9V can connect to power pins

"irremote library by sherriff" compatibility.... having eliminated most other issues, i suspect incompatibility. any btdt or advice?

Sometimes these ship without bootloaders. You will have to flash it yourself if that’s the case. This can be done with a known good Arduino.

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LAFVIN Nano V3.0, ATmega328P 5V 16M Micro-Controller Board for Arduino (3 Pack With USB Cable)

LAFVIN Nano V3.0, ATmega328P 5V 16M Micro-Controller Board for Arduino (3 Pack With USB Cable)

Product ID: 214966687

Details

Brand
LAFVIN
Compatible Devices
Personal
Hardware Interface
USB
Item Weight
0.2 Ounces
Style
Classic

⚡16 MHz clock speed

🔌5V operating voltage

🔢14 digital I/O & 8 analog inputs

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AED 211

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Description

🚀 Nano-sized tech, mega-sized possibilities!

COMPACT POWERHOUSE - ATmega328P microcontroller delivering reliable 16 MHz performance for seamless Arduino IDE integration.
VERSATILE I O ARSENAL - 14 digital pins (6 PWM) plus 8 analog inputs empower complex robotics, IoT, and automation projects.
FLEXIBLE POWER OPTIONS - Supports USB power or external 5V-12V supply, ensuring your projects stay energized anywhere.
PLUG PLAY SIMPLICITY - Includes USB cable for instant connection and programming—no extra accessories needed.
BREADBOARD FRIENDLY DESIGN - Compact form factor fits perfectly on breadboards, accelerating prototyping and innovation.

The LAFVIN Nano V3.0 is a compact, Arduino-compatible microcontroller board powered by the ATmega328P chip running at 16 MHz. Operating at 5V, it offers 14 digital I/O pins (including 6 PWM) and 8 analog inputs, making it ideal for diverse electronics projects from robotics to IoT. Included USB cable enables easy programming and power supply, while its breadboard-friendly size and flexible power options make it a versatile choice for both beginners and pros.

Specifications

ASIN	B07G99NNXL
Best Sellers Rank	#254,272 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #845 in Barebones
Brand	LAFVIN
Brand Name	LAFVIN
Compatible Devices	Personal Computer, Laptop, Printer, Router, Monitor, Smartphone, Tablet
Country of Origin	USA
Customer Reviews	4.6 out of 5 stars 2,103 Reviews
Hardware Interface	USB
Item Weight	0.2 Ounces
Manufacturer Part Number	LA-020
Model Number	8541582500
Style	Classic
Style Name	Classic
UPC	781520418697

Reviews

S**.

The ardino in the pic is not same as sent,ur dealer support is very poor.qyality is also very poor

Very bad The ardino in the pic is not same as sent,ur dealer & service is very bad .

16.10.2023

J**.

Excelencia

Funcionan perfectamente

23.07.2024

I**H

Works but ensure you have CHP340 Driver

This arduino clone works well having similar footprint and functions. However to help alleviate some headaches I faced with arduino. First ensure that you have a CHP340 driver installed on your computer. Second ensure you choose the proper board settings Arduino Nano processor ATMega328 Now for me this is what helped. When trying to flash the code onto the nano, pull up serial monitor prior to doing it. For some reason without serial monitor, I couldn't program the nano. With the serial monitor up I could. It would say connector failed but still flash the code on.

13.01.2026

M**D

Excellent

Excellent product

3.08.2024

Y**.

Will buy from here again

Great little boards

12.01.2026

C**A

Excelente producto

Muy buena calidad. Gracias

8.10.2023

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Smooth transaction and product arrived in perfect condition.

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