How to program USB RFID reader/writer module?
Read the readme files for the headers on Github Readme.Serial.


  Although the interface connects to the serial port, it doesn't utilise
  the RS-232 serial protocol and instead I/O is performed with bit banging.
  Data output bits are sent through the DTR line and clocked on the falling
  edge of RTS.
  The Tx line is utilised to enable the application of the high programming
  voltage on !MCLR/VPP and not for sending data bits.
  Data input bits are read from the CTS line using the same clock as for
  output with the data output line taken high for correct circuit operation.


I guess you will have find another way.