DFRobot
6-in-1 USB to Serial Converter
A versatile USB-to-serial converter module supporting six conversion modes: USB-TTL, USB-232, USB-485, TTL-232, TTL-485, and 232-485. Switch between modes us...
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A versatile USB-to-serial converter module supporting six conversion modes: USB-TTL, USB-232, USB-485, TTL-232, TTL-485, and 232-485. Switch between modes using onboard DIP switches — no need for multiple adapters.
Built around the CP2102 chip with 3.3V/5V compatibility. Includes 500mA fuse protection against short circuits and over-current, plus LED indicators for power (yellow), RX (red), and TX (green) status.
Key Features
- 6 Conversion Modes – USB-TTL, USB-232, USB-485, TTL-232, TTL-485, 232-485
- DIP Switch Selection – Quickly switch modes without rewiring
- 3.3V/5V Compatible – Works with both voltage levels
- 500mA Fuse Protection – Over-current and short-circuit protection built in
- Status LEDs – Yellow (USB/COM), red (RX), green (TX)
- Up to 2 Mbps – High-speed baud rate support
Specifications
- Chip – CP2102
- Voltage – 3.3V/5V compatible
- Baud Rate – Up to 2 Mbps
- Protection – 500mA fuse (over-current and short-circuit)
- OS Support – Windows, Linux, macOS
- Dimensions – 31 × 18mm
Mode Selection
- USB to TTL – DIP1 (USB) On, DIP2 (485) Off, S1 Down
- USB to 232 – DIP1 (USB) On, DIP2 (485) Off, S1 Up
- USB to 485 – DIP1 (USB) On, DIP2 (485) On, S1 Down
- TTL to 232 – DIP1 (USB) Off, DIP2 (485) Off, S1 Down
- TTL to 485 – DIP1 (USB) Off, DIP2 (485) On, S1 Down
- 232 to 485 – DIP1 (USB) Off, DIP2 (485) On, S1 Down
Ideal For
- Debugging and programming microcontrollers via serial
- Industrial RS-485 and RS-232 device communication
- Converting between serial protocols without multiple adapters
Package Contents
- 1× 6-in-1 USB to Serial Converter
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- DIP switch
- A DIP switch is a small set of physical on/off switches used to configure hardware settings without software. It matters because changing features such as auto power-on or charging limits may require moving these tiny switches correctly.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- RS-232
- RS-232 is an older serial communication standard that uses higher, inverted signal voltages (typically around plus or minus 3 to 15 volts) rather than the low logic levels of modern microcontroller pins. When connecting RS-232 equipment to a microcontroller, you usually need an RS-232 transceiver or level converter rather than wiring it directly, or you risk damaging the pins.
- RX
- RX means receive, usually showing data being received by the board. An RX indicator LED can help with troubleshooting USB or serial communication.
- TX
- TX means transmit, usually showing data being sent from the board. A TX indicator LED can help you see when the board is communicating or uploading code.
- USB to serial converter
- A chip that converts a USB connection into the serial (UART) signals a microcontroller understands. A board that includes one usually appears to a computer as a serial port for programming and debugging, rather than as a native USB device such as a keyboard or mass-storage drive.
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Prototyping & Wiring
Supplier page — dfrobot.com
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