Best Usb Type A Serial Adapters in 2026
Daisy
Last Updated: Jul 17, 2026
Daisy
Last Updated: Jul 17, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
With this USB to TTL adapter, you can establish communication with your board/MCU through your computer. Maximum transmission speed up to 3Mbps
The main chip is FT232RL from FTDI ,High stability. LED indicator for TX,RX,Power,It is very useful when you are debugging or downloading.
Pin Definition: CTS,RTS,RXD,TXD,GND,VCC;Support VCC output 3.3V and 5V, switch by jumper.
Works with Windows 10, 7(32/64bit) Vista 2008, XP, 2003,Mac Etc.
WARRANTY:We back this FDTD USB to TTL Converter with 12 months warranty.If you meet any question, Please contact us, We will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
FTDI FT232RL IC:Built-in original FTDI FT232RL IC. Supports 5V, 3.3V and 1.8V Logic TTL levels,You can switch Logic levels by jumper.
Protective case: Come with a transparent protective casing, this transparent protective casing to effectively prevent static interference from the hand and prevent unintentional short circuit.
Application:Support EEPROM, Vendor ID re-write, unbrick routers ,program ESP8266 module, interface to GPS modules, flash firmware on hard drive, update transmitter, interface to set top box and other compatible UART interface devices
Compatibility: This USB to TTL adapter is compatible with Windows 7, 8, 10 and various Linux OS and Mac OS
WARRANTY:DSD TECH back this FTDI FT232RL USB to TTL UART adapter with 12 months warranty.If you meet any question, please contact us, we will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
Designed to be used for USB to TTL electronic projects, easy to connect to your MCU or Raspberry Pi. Status LED for TX,RX,USB
Built-in Silicon Labs CP2102 USB to TTL Serial Transfer Chip ,Industrial chip, high quality, super stable.
Standard USB power supply, the lead pin includes: 3.3V, GND, TXD, RXD, 5V, GND. With this adapter, you can power 3.3V and 5V microcontrollers. Very flexible.
Supports Windows 2000, XP, Vista, Window 7,8,10, Mac OS 9, Mac OS X & Linux.
WARRANTY:DSD TECH back this usb to ttl serial cable adapter with 12 months warranty.If you meet any question, please contact us, we will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
Industrial grade USB to RS485 RS422 converter. It easily lets you connect any RS485 or RS422 device directly to your computer's USB port
The main chip is FTDI FT232RL. Built-in 15KV ESD protection and TVS overvoltage protection. Enough for you to deal with different occasions.
LED for RX TX and Power.
Works with Windows 10, 7(32/64bit) Vista 2008, XP, 2003,Mac Etc.
WARRANTY:We back this usb to RS422/RS485 Converter with 12 months warranty.If you meet any question, Please contact us, We will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
Bluetooth module HC-05 Master and slave Two in one module. Please note: iOS devices (iPhone) are not supported
Use the CSR BC417 mainstream bluetooth chip, bluetooth V2.0 SPP protocol standards
Module working voltage 3.6 V to 6V
Default rate of 9600,default pin:1234, the user can be set up.click the button into AT MODE
Can be switched via AT commands as master or slave mode , the device can be connected via AT commands specified
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
DSD TECH: DSD TECH focuses on the development of serial devices such as TTL/RS232/RS485. We have served more than 100,000 customers in total.
Silicon Labs CP2102N:CP2102N is an upgraded version of CP2102 chip, the maximum transmission speed can reach 3Mbps, which is equivalent to FT232RL.
1.2M/4 Feet:The length of this USB to TTL serial cable is 1.2M/4 Feet. The pin interfaces are: VCC (5V), GND, TX, RX, CTS, RTS. It can meet most of the usage scenarios.
Compatibility: This USB to TTL cable is compatible with Windows 7, 8, 10 and various Linux OS and Mac OS
Warranty:DSD TECH provide a 1 year warranty and lifetime technical support for this USB to TTL Serial Cable.if you have any questions, please feel free to contact us. We will respond within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
Industrial-grade :The built-in isolated power supply and ADI signal isolation chip can effectively protect computer damage caused by accidental short circuit, electric shock and other damage.
USB to RS485/RS422:Support RS-422 (RxD+, RxD-, TxD+, TxD-, GND) and RS-485(A+, B-, GND) Interface.
High stability: Built-in original FTDI FT232RL chip,Maximum speed up to 3Mbps
Compatibility: Works with Windows 10, 7(32/64bit) , XP, 2003,Liunx,Mac OS Etc.
Warranty:We provide a 1 year warranty and lifetime technical support for this isolated USB to RS485 RS422 Converter.if you have any questions, please feel free to contact us. We will respond within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 9.02 | ✅ | ✅ | ✅ |
USB 2.0 to RS485 Converter Adapter and all kinds of 485 interface docking, transmission distance up to 1000 meters.
Mainchip:CP2102(SILICON LABS) and MAX13487,Industrial chip, high quality, super stable.
With 15KV ESD protection and TVS overvoltage protection
Transmission rate up to 500Kbps, Support multi-machine communication, allowing up to 128 slave devices
WARRANTY:We back this usb to RS485 Converter with 12 months warranty.If you meet any question, please contact us, we will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
Bluetooth RS232 Adapter : With this Bluetooth RS232 adapter, you can wirelessly communicate with any RS232 devices on Android smartphones or a Bluetooth enabled computer.
Built-in Industrial Bluetooth 2.0 SPP module driven by the CSR BC417 chip. Compatible with Android phones and Bluetooth enabled computers, but not compatible with any iOS device.
RS232 DB9 Interface: Please note that only Rx and Tx signals are valid. Does not support CTS, RTS hardware flow control.
Bluetooth pairing PIN: 1234, Baud rate parameters: 9600, N, 8, 1. Transmission distance of more than 20 meters.Baud rate and Bluetooth name and PIN can be configured by software. DSD TECH provides setup software for free.
About WARRANTY: DSD TECH offers a one-year warranty and lifetime technical support. If you meet any question, please contact us, we will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
Industrial-grade USB isolation module: ADI's iCoupler signal isolation technology is used to fully protect the computer's USB port from external short-circuit, shock and other damage.
The main chip is FT232RL from FTDI ,High stability. LED indicator for TX,RX,Power,It is very useful when you are debugging or downloading.
Protective case: We have installed a protective case for this isolated USB to TTL Converter, which prevents your hands from directly touching the PCB and IC.
Both 3.3V and 5V Logic TTL are supported. You can switch by jumper.
DSD TECH offers a 1-year warranty and lifetime technical support for this isolated USB-to-TTL adapter.If you meet any question, Please contact us, We will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
FTDI FT232RL Chip:Built-in original FTDI FT232RL Chip,High quality and high reliability.Ideal for programmers, hardware engineers and DIY User.
1.8M/5.9 Feet: The length of the line is 1.8 meters(5.9 feet).ideal USB 2.0 debug tools for Vendor ID re-write, router, GPS, set top box, transmitter, flash firmware,Debugging,Programing , etc.
PIN:this cable provides access to UART (transmit) Tx, (receive) Rx, VCC (5V) and GND,CTS,RTS.TTL Level is 3.3V
Compatibility: This USB-to-TTL Serial cable is compatible with Windows 7, 8, 10 and various Linux OS and Mac OS
WARRANTY:DSD TECH back this FTDI FT232RL USB to TTL Serial cable with 12 months warranty.If you meet any question, please contact us, we will fix your issue within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
DSD TECH: DSD TECH focuses on the development of serial devices such as TTL/RS232/RS485. We have served more than 100,000 customers in total.
USB TYPE C TO TTL SERIAL ADAPTER: Interface with TTL Serial equipment using this USB Type-C Serial adapter. Suitable for some laptops with only USB Type-C interface. The pin interfaces are: VCC (5V), GND, TX, RX, CTS, RTS. It can meet most of the usage scenarios.
Silicon Labs CP2102N:CP2102N is an upgraded version of CP2102 chip, the maximum transmission speed can reach 3Mbps, which is equivalent to FT232RL.
Compatibility: This USB-C to TTL adapter is compatible with Windows 7, 8, 10 and various Linux OS and Mac OS
Warranty:DSD TECH provide a 1 year warranty and lifetime technical support for this USB-C to TTL adapter.if you have any questions, please feel free to contact us. We will respond within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
DSD TECH: DSD TECH focuses on the development of communication connection devices such as USB/Serial/Wireless. We have served more than 100,000 customers in Europe, North America and Japan.
Open Source Hardware Plan: SH-C30A is derived from the open source hardware project Canable. As a good quality hardware manufacturer, DSD TECH hopes to make some contributions to the development of open source hardware. All documentation of this product (schematics, BOM lists, Gerb files) is publicly available on the DSD TECH website.
USB to CAN Bus: With this adapter, your computer can be connected directly to the CAN bus. Built-in 120 ohm switch and programming switch.
Flexibility: With the default Candlelight firmware, you can complete the data processing of the CAN bus through the open source software cangaroo.You can also flash other firmware yourself to support software such as PCAN, SLCAN,BUSMASTER etc.
Warranty: DSD TECH provide a 1 year warranty and lifetime technical support for this USB to Can Adapter.if you have any questions, please feel free to contact us. We will respond within 24 hours.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 8.87 | ✅ | ✅ | ✅ |
HC-05 Wireless BT Module: with this HC 05 Bluetooth module,You can quickly add the Bluetooth feature to your DIY project, and then you can use your android phone to control some gadgets, such as: switch, LED.
Master and Slave 2-IN-1 HC 05 Module:Working Voltage 3.6V to 6V , Default baud rate:9600,Default pin:1234
Button: Press the button, the module enter the AT mode. AT commands are executed only in AT mode.
6 PIN Dupont Cable : with this Dupont Cable, you can easily connect this HC-05 Bluetooth module.
Why choose DSD TECH brand: you not only get high-quality products, you can also get technical support and ONE YEAR WARRANTY. You can ask any questions about this HC05 module, our technical team is waiting for you.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| DSD TECH Direct | 9.18 | ✅ | ✅ | ✅ |
Support 4 kinds of TTL levels:This is a versatile USB to TTL converter. It is powerful enough to handle almost all TTL level communications. It is compatible with 5V, 3.3V, 2.5V, 1.8V TTL levels.
FTDI FT232RL Chip:Built-in original FTDI FT232RL Chip.The DSD TECH brand never uses cheap fake chips.
Not only provides access to UART Transmit (Tx), Receive (Rx), RTS#, CTS#, VCC and GND pins,but also provides access to DSR,R1,DCD,DTR,RESET pins
Protective case: Come with a protective case, this transparent protective case can effectively prevent static interference from the hand and prevent accidental short circuit.
WARRANTY:DSD TECH back this FTDI FT232RL USB to TTL UART adapter with 12 months warranty.If you meet any question, please contact us, we will fix your issue within 24 hours.
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Dsd Tech | 15 |
We've carried out a comprehensive analysis of 4,320 reviews on serial adapters, using our selection criteria to identify the best options in the computers & accessories. Our findings reveal that most customers typically select serial adapters priced around $13.96, with top brands including oikwan, kingdee inc, warmstor, dtech, startech, benfei, dsd tech, sabrent and godshark and top-longer
Our team of expert editors reviewed these high-quality items and handpicked the top 15 serial adapters for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the computers & accessories category. These include oikwan, kingdee industrial co.,ltd, warmstor, dtech co.,ltd, amazon.com, benfeidirect, dsd tech direct, store4pc and aflatroad and top-longer .
We are dedicated to assisting our users in finding the right adapters Products based on their needs, saving them considerable time when choosing which serial adapters to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
PickSmartly is dedicated to creating a platform designed to streamline your shopping experience, empowering you to make well-informed purchasing decisions with minimal time and effort. At the heart of our mission is the commitment to earning and maintaining the trust of our users, as we believe this to be fundamental to the services we provide.
When you engage with our websites, services, or tools, we or our approved service providers may utilize cookies to store information. This is done to enhance your user experience by making it more efficient, secure, and tailored to your preferences, as well as for marketing objectives.
We are an Amazon Associate and earn commissions from qualifying purchases. Our participation in the Amazon Services LLC Associates Program, an affiliate advertising initiative, provides us with a means to generate income through links to Amazon.com and its affiliated websites. Please note that Amazon, Amazon Prime, their logos, and the Amazon Prime logo are registered trademarks of Amazon.com, Inc., or its associated companies.
