WitMotion 6-in-1 USB to Serial Converter CP2102: USB-TTL/RS232/RS485, TTL-232/485, 232-485

Overview

This [6-in-1] USB to Serial Converter is a multifunctional serial adapter for converting between USB, TTL, RS232, and RS485 interfaces. It supports USB-TTL, USB-RS232, USB-RS485, TTL-232, TTL-485, and 232-485 conversion modes, using a CP2102 chipset and on-board mode switching for selecting the required interface.

Key Features

• 6 serial conversion functions: USB-TTL, USB-RS232, USB-RS485, TTL-232, TTL-485, 232-485.
• Chipset: CP2102 (stable and reliable).
• USB: USB 2.0 specification.
• Baud rates: 300 bps to 1.5 Mbps.
• 3.3V/5V support: Supports 3.3/5V voltage input and output; can power an MCU.
• Protection: Built-in 500mA self-recovery fuse (for protecting the circuit and preventing short circuit).
• Status indication: Indicator lights described as COM connection (yellow), RX receiving (red), TX sending (green); additional board labels also indicate USB/receiving/sending indicators.
• OS compatibility (as stated): Windows 98SE/2000/XP/Vista/7/8/10 (32-bit/64-bit), Linux, WinCE, Mac OS 9, Mac OS X, Mac.

Specifications

Product type	6-in-1 USB to serial converter / serial communication module
Supported modes	USB-TTL; USB-232; USB-485; TTL-232; TTL-485; 232-485
USB specification	USB 2.0
Chipset	CP2102
Baud rate	300 bps to 1.5 Mbps
Voltage	3.3V/5V input and output
Fuse	500mA self-recovery fuse
Indicator lights	COM connection (yellow), RX (red), TX (green); board callouts also label USB/receiving/sending indicators
Dimensions	54.8 mm (L) x 18.6 mm (W) x 7.2 mm

Pin Definitions

+5V	Module power supply, 5V input and output
3V3	Module power supply, 3.3V output
RX	Serial data input, TTL level
TX	Serial data output, TTL level
232R	Serial data input, 232 level
232T	Serial data output, 232 level
A	RS485 signal line A
B	RS485 signal line B
GND	Ground wire
DTR	Data terminal preparation / control flow output
RTS	Request to send

Dial Mode Instructions

Mode	Dial1 (USB)	Dial2 (485)	Switch S1
USB-TTL	ON	OFF	Down (232-485)
USB-232	ON	OFF	UP (232-TTL)
USB-485	ON	ON	Down (232-485)
TTL-232	OFF	OFF	Down (232-485)
TTL-485	OFF	ON	Down (232-485)
232-485	OFF	ON	Down (232-485)

Function Test Notes (as described)

• USB to TTL self-closed loop: Connect TXD and RXD with a DuPont cable, set the corresponding dial switch mode, connect to PC, then use a serial debugging assistant to send data and confirm data return.
• USB to 232 self-closed loop: Connect 232TX and 232RX, set the corresponding dial switch mode, connect to PC, then use a serial debugging assistant to send data and confirm data return.
• USB to 485 test: Attach other 485 devices (example given: use two modules in USB-485 mode, connect A-to-A and B-to-B, then verify send/receive using serial port debugging assistants).

What's Included

• 1x WitMotion 6-in-1 serial adapter
• 4x Dupont cables
• 1x Welcome card
• Antistatic bag packaging

Notes

• Some included graphics/documentation also reference CH340 and a “3-in-1” serial converter; the product described in this listing is the 6-in-1 adapter (as titled and packaged) with CP2102.
• Some graphics mention “USB-CAN”; this function is not part of the stated 6 conversion modes (USB/TTL/RS232/RS485 and cross-conversion between TTL/232/485).

Support

This product is stated to include a 12-month warranty. For order help or technical support from this store, contact https://voltaspir.com/ or email [email protected].

Details

Switch between USB‑TTL, USB‑RS232, USB‑RS485, TTL‑to‑RS232/RS485, and RS232‑to‑RS485 using one compact adapter.

A CP2102-based USB to serial converter for bench work and field troubleshooting, with a DuPont cable for quick hookups.

Driver and feature notes summarize wide OS compatibility, selectable 3.3V/5V power, and clear RX/TX status LEDs.

Onboard switching and indicator LEDs make it easy to confirm the selected interface and live serial traffic at a glance.

Pinout includes TTL RX/TX, RS232 TX/RX, RS485 A/B, power rails, and control lines for flexible wiring.

Select the required conversion mode using the DIP switches—settings are provided for all six interface combinations.

Wiring diagrams help connect PCs, TTL devices, RS232 equipment, and RS485 buses without guesswork.

The CP2102 USB-to-serial converter uses a compact USB dongle design with a 4-pin header labeled +5V, RX, TX, and GND for simple wiring.

This USB‑to‑RS485 converter uses a CH340 driver and includes a 4‑wire Dupont lead for quick serial wiring to embedded boards.

The USB-to-serial converter uses a compact USB plug module with a 5-pin header labeled +5V, 3.3V, A, B, and GND for straightforward wiring.

The USB-CAN adapter uses a compact USB-A dongle design with a pin header and jumper lead for quick CAN bus connections.

The 4-channel USB‑TTL board uses a micro‑USB connection and four JST-style ports for simple multi-device serial wiring.

The FT4232HL USB-to-serial board supports up to 12Mbps communication, provides a 5V/500mA power interface, and can connect four serial ports simultaneously for data observation.

The CP2102 USB-to-serial module uses a USB-C interface with power and communication indicators plus multi-lead TTL connectors for wiring different serial links.