Does this have a genuine prolific chip inside? Or does it show a warning message in devicemanager and/or make you use an old driver to get it working?

It uses the genuine 2102 chip of cp210x series. Before make it work in Windows, you need to install driver, https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers

Can you set 3v3 logic levels?

Let me take am example. You should connect the 5V pin if you use it with Mega 2560, and connect the 3.3V pin if use with the 3.3V board.

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USB to TTL

Product ID: 177451273

Details

Compatible devices
Computers PC
Specific uses for product
Electronic &
Connector type
usb
Colour
Blue
Brand
DIYmalls

⚡Dual voltage 3.3V/5V operation

💻Wide OS compatibility

🔌6-in-1 versatile serial conversion

Description

🔗 Connect smarter, convert faster — the only serial adapter you’ll ever need!

ARDUINO NEXTION READY - Perfect companion for makers and pros working with popular microcontrollers and displays.
PLUG PLAY VERSATILITY - Supports Windows XP through 10 (32/64-bit) and Linux for hassle-free integration.
DUAL VOLTAGE POWER FLEXIBILITY - Operates effortlessly at both 3.3V and 5V, bridging diverse hardware needs.
ULTIMATE 6 IN 1 SERIAL ADAPTER - Seamlessly switch between USB to TTL, RS232, RS485, and more with one compact module.
CUSTOMIZABLE DIP SWITCH CONTROL - Easily configure your desired serial protocol without complex setups.

The CP210x Series 2102 USB to TTL Serial Module is a versatile 6-in-1 adapter supporting USB to TTL, RS232, and RS485 conversions. Compatible with multiple operating systems including Windows and Linux, it operates at both 3.3V and 5V, making it ideal for Arduino, Nextion displays, and other embedded projects. Configurable via DIP switches, it offers flexible serial communication solutions in a single compact device.

Reviews

M**N

Very Versatile module

Great piece of kit. Took me a while to figure out the settings of the switches for the various modes, but its in the pictures...

16.07.2021

A**R

Work well.

Have proved a handy device for connecting GPS and LIDAR to usb.

1.09.2025

R**R

Works Well

This USB adapter has 6-in-1 functionality allowing you to convert USB to RS485, RS232, TTL to RS232, RS485, and more. This makes it a very handy device.I've been using it for my Arduino projects, and it has made connecting different devices very easy. The data transmission is seamless, and it works great with various devices.It even comes with a 6P female-to-female cable, making it even more versatile. If you're into electronics and need reliable and flexible connectivity options, this module is a great choice. I would recommend.

4.08.2023

M**B

Takes a bit of getting to work, but good results.

It took me a while to get this to work as I wanted (talking to Arduino to provide a 32 bit I/O interface for my computer) but all was good once I could send/receive data.Simple circuit with no instructions but does come with small jump leads to a prototype board and is comparatively cheap.

7.07.2023

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