This USB to serial adapter enables seamless data communication between a PC and devices using TTL, RS232, or RS485 serial protocols.
It is widely used for MCU programming, sensor data acquisition, industrial debugging, PLC communication, and firmware upgrade tasks.

The adapter integrates mature interface chips to ensure high transmission stability, fast data rates, and strong anti-interference performance in industrial environments.

Key Features

• Multi-Protocol Support
  USB to TTL / RS232 / RS485 in one compact adapter.

• High Data Rate & Stable Signal
  Supports baud rates from 50 bps up to 2 Mbps (up to 3 Mbps under optimal conditions).

• Wide System Compatibility
  Works with Windows (32/64-bit), Linux, macOS, and Android systems.

• Flexible Wiring Options
  Supports screw terminal blocks or pin headers for easy field wiring.

• Industrial-Grade Chipset
  CH340 USB interface with MAX485 (RS485) and MAX3222E (RS232) for reliable communication and ESD protection.

Supported Interface Modes

• USB to TTL (3.3 V / 5 V selectable)

• USB to RS232 (TXD, RXD, GND)

• USB to RS485 (A / B differential, half-duplex)

Typical Applications

• MCU programming and firmware download (STC, STM series)

• Sensor signal acquisition and testing

• PLC communication and industrial control systems

• Access control systems, POS devices, barcode scanners

• CNC machines, industrial instruments, data loggers

• Router, set-top box, and embedded system debugging

Wiring & Integration

• Clearly labeled TX / RX / GND / VCC / A / B terminals

• Supports direct connection to TTL, RS232, or RS485 devices

• Recommended for development, testing, and on-site debugging

Refer to the wiring diagrams for correct interface selection.

Why Choose This USB Serial Converter

• Reliable communication for industrial and embedded projects

• One adapter supports multiple serial standards

• Compact, portable design for field engineers

• Ideal companion for MyAntenna RF sensors and evaluation setups