A USB-to-UART (TTL) communication module based on the PL2303GS chip. Connect it to your PC via USB and communicate with microcontrollers, single-board computers, and other TTL-level serial devices. Three LED indicators (TXD, RXD, PWR) provide visual feedback during operation.

The module supports flexible VCCIO configuration via an onboard jumper: output 5 V, 3.3 V, or leave open to accept power from the target board (1.8–5 V).

Key Features

• PL2303GS Chip – Latest version for reliable USB-to-UART conversion
• TTL Level Output – Compatible with 1.8 V, 2.5 V, 3.3 V, and 5 V logic
• Selectable VCCIO – 5 V, 3.3 V, or external power via jumper
• 3 LED Indicators – TXD, RXD, and PWR status
• Windows Compatible – Supports Windows XP / 7 / 8 / 10 / 11

Wiring (Example: Type A with MCU)

• VCCIO → 3.3 V or 5 V (set via onboard jumper)
• GND → GND
• TXD → MCU RX
• RXD → MCU TX

Package Contents

• 1× PL2303 USB UART Board
• 1× 4-Pin Custom Connector Jumper Wire

Resources

• Waveshare Wiki