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Small green circuit board with USB-C port, pin header, three LEDs and a jumper block

WaveShare

WaveShare PL2303 USB-C to UART (TTL) Module 1.8V 2.5V 3.3V 5V

SKU CH-99E7-4A5H2

Converts USB-C to UART TTL with PL2303GS chip, jumper-selectable 1.8V, 2.5V, 3.3V or 5V logic levels, and TXD, RXD, PWR LEDs

  • CPU TypeOther
  • USB-C connector for modern host compatibility
  • PL2303GS chip enables reliable UART communication
  • Four logic levels supported from 1.8V to 5V
  • Jumper-selectable VCCIO powers target board directly
  • Three status LEDs show TXD, RXD and power activity

USB-C to UART module for serial debugging

The WaveShare PL2303 module converts a USB-C port into a TTL-level UART interface using the PL2303GS chip. It is aimed at engineers and hobbyists who need to communicate with microcontrollers, routers or other embedded devices over a serial link. The board handles logic levels of 1.8V, 2.5V, 3.3V and 5V.

Check your target voltage and driver support

Before ordering, verify that the device you intend to connect operates at one of the supported logic levels and that you can set the VCCIO jumper accordingly. Ensure your host computer runs Windows XP, 7, 8, 10 or 11 so that the standard PL2303 driver will recognise the adapter.

Steady data flow with visual status feedback

Three onboard LEDs show power, transmit and receive activity, letting you monitor the link continuously during long debugging sessions. The PL2303GS chip maintains stable throughput without the burst-only behaviour seen in some older bridge chips, so extended log captures remain reliable.

Highlights

  • USB-C connector for modern host compatibility
  • PL2303GS chip enables reliable UART communication
  • Four logic levels supported from 1.8V to 5V
  • Jumper-selectable VCCIO powers target board directly
  • Three status LEDs show TXD, RXD and power activity

Specifications

CPU TypeOther

Questions about this item

What comes in the box and what extra cables or headers do I need to buy?

The module provides a USB-C connector and a pin header for TXD, RXD, VCCIO and GND; you must supply your own USB-C cable and any Dupont wires or connectors for the header.

How do I select the right logic level for my target board?

Use the VCCIO jumper: fit it to the 5 V position for 5 V output, to the 3.3 V position for 3.3 V output, or remove it entirely to power the I/O from the target board at 1.8 V, 2.5 V, 3.3 V or 5 V.

What does the PL2303GS chip actually give me when the module is plugged into a PC?

It enumerates as a virtual COM port on Windows 10 and 11, letting serial terminals talk to the target at the chosen logic level while the TXD, RXD and PWR LEDs show traffic and power status.

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