Serial port module

USB to TTL serial port module

Product parameters

• Brand: Firefly
• Size: 25mm*15.5mm

Technical information

Driver download: https://www.prolific.com.tw/en/portfolio-item/pl2303gl/

Physical map

Connection method

USB to Serial adapter with four pins:

• 3.3V power supply (NC), no connection required
• GND, the ground wire of the serial port, connect to the GND pin of the serial port of the development board
• TXD, the output line of the serial port, connected to the TX pin of the serial port of the development board
• RXD, the input line of the serial port, connect to the RX pin of the serial port of the development board

Note: If you encounter the problem that TX and RX cannot be input and output when using other serial adapters, you can try to reverse the connection of TX and RX.

AIO-1684XQ DEBUG port: