Why does the product photo have a jumper across txd and rxd?

The jumper between TX and RX is mainly used for testing. Short TX, RX means you will receive any data you send. When you program or debug, you can quickly confirm if the TTL adapter is damaged. It saves you time and quickly locates faults.

What is the maximum baud rate of this device?

Build-in FTDI FT232RL Chip, max speed is to 3Mb/s . After testing, we found that data can be transmitted stably below 115200 baud rate.

Does this work with the arduino ide to upload sketches to the arduino pro mini?

yes ,it work with arduino ide to upload sketches to pro mini.

I want to confirm, 5v from the usb side is output to vcc as 5v or converted to 3.3v /1.8v by jumper and sets ttl interface level correct?

Hi, I just checked this on mine with a DMM to verify. Your assumption is correct: the jumper will alter the VCC to 5/3.3/1.8V.

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SH-U09C2

Product ID: 152129318

Details

Color
Multicoloured
Compatible Devices
Hard Drive
Connector Type
USB Type A
Item dimensions L x W x H
1.5 x 0.4 x

⚡FTDI FT232RL IC for ultra-reliable data transfer

🔄Switchable 5V/3.3V/1.8V logic levels via jumper

🛡️Transparent protective case guards against static & shorts

CI$24

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Sold byAmazon Cayman IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Debug Like a Pro, Program Like a Boss!

PLUG PLAY POWERHOUSE - Seamlessly supports Windows, Linux, and Mac OS for instant debugging and programming.
LOGIC LEVEL FLEXIBILITY - Easily toggle between 5V, 3.3V, and 1.8V TTL levels to match your device’s needs without hassle.
ROBUST STATIC SHIELDING - Transparent casing not only looks sleek but actively prevents static interference and accidental shorts.
VERSATILE COMPATIBILITY - Perfect for flashing firmware, unbricking routers, programming ESP8266, GPS interfacing, and more.
TRUSTED SUPPORT WARRANTY - Backed by a 1-year replacement warranty and dedicated technical support to keep your projects on track.

The DSD TECH SH-U09C2 USB to TTL Adapter features the original FTDI FT232RL IC, offering switchable 5V, 3.3V, and 1.8V logic levels in a compact, static-resistant transparent case. Compatible across Windows, Linux, and Mac OS, it’s engineered for seamless debugging, programming, and firmware flashing with a 1-year warranty and expert support.

Specifications

ASIN	B07TXVRQ7V
Best Sellers Rank	#23 in Serial Adapters
Brand	DSD TECH
Color	Multicoloured
Compatible Devices	Hard Drive, Laptop
Connector Type	USB Type A
Current Rating	1 A
Customer Reviews	4.8 out of 5 stars 930 Reviews
Finish	Plastic
Input Voltage	5 volts
Item Dimensions	1.5 x 0.4 x 0.15 inches
Item Weight	5.67 g
Item dimensions L x W x H	1.5 x 0.4 x 0.15 inches
Manufacturer	DSD TECH
Mfr Part Number	SH-U09C2
Model Number	SH-U09C2
Number of Items	1
Number of Ports	1
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	Programmierung, Debugging, EEPROM, Router, ESP8266 Modul, GPS-Module, Firmware auf Festplatte, Sender, Set-Top-Box Specific Uses For Product Programmierung, Debugging, EEPROM, Router, ESP8266 Modul, GPS-Module, Firmware auf Festplatte, Sender, Set-Top-Box See more
UPC	734678383287
Unit Count	1 Count
Warranty Description	1 year warranty
Warranty Type	12 months warranty.if

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