Serial Port Module¶

USB to TTL Serial Port Module ¶

Product Parameters¶

Brand: Firefly
Size: 25mm*15.5mm

Technical Information¶

Driver Download: http://www.prolific.com.tw/US/ShowProduct.aspx?pcid=41

Physical Image¶

_images/module_serial_list.png

Connection Method¶

USB to Serial Adapter, with four pins:

3.3V Power (NC), no need to connect
GND, ground line for the serial port, connect to the GND pin of the development board
TXD, output line for the serial port, connect to the TX pin of the development board
RXD, input line for the serial port, connect to the RX pin of the development board

Note: If using another serial adapter and encountering issues with TX and RX not being able to input and output, try swapping the connections of TX and RX.

AIO-1688JD4 DEBUG Port:

_images/debug_connection.png