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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