usb-knob/pc-client/main.py

import time
import os
current_path = os.path.dirname(os.path.realpath(__file__))
try:
    import serial
except ImportError:
    try:
        os.system("pip install pyserial")
        import serial
    except ImportError:
        print("Please execute'pip install -r requirements.txt'")
        exit()

host = serial.Serial('COM3', 9600)

while True:
    try:
        output = host.readline()
        output.replace("\r\n", "")
        print(output.decode("ASCII"))
    except KeyboardInterrupt:
        exit()