I just learned about these pins. I wasn't making use of CTS in my program up till now, and I found something odd about my LCD. The CTS pin always returns false. I configured and connected my old LCD module to check to see if it was any different. You can see the difference below.
Code:
>>> import serial
>>> f = serial.Serial("/dev/ttyUSB0", 115200) # Old LCD
>>> f.isOpen()
True
>>> f.getCTS()
True
>>> f.close()
>>> f = serial.Serial("/dev/ttyUSB1", 115200) # New LCD
>>> f.isOpen()
True
>>> f.getCTS()
False
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