Print serial data sent over USB from a development board

serial.py

import sys
import serial
import serial.tools.list_ports as port_list

def serial_communication():
    ports = list(port_list.comports())
    if ports == []:
        print("No open ports found!")
        sys.exit()

    print(f"Connected to {ports[0].device}")

    port = ports[0].device
    baudrate = 115200

    serial_port = serial.Serial(port=port, baudrate=baudrate, bytesize=8, timeout=1, stopbits=serial.STOPBITS_ONE)
    serial_string = ""

    while True:
        try:
            char = str(serial_port.read())[2:-1]
            serial_string += char

            if char == "\\n":
                serial_string = serial_string.split('\\r')[0]
                print(serial_string[:1])
                serial_string = ""

        except serial.serialutil.SerialException:
        	print("Serial disconnected")
        	break

        except KeyboardInterrupt:
            break

    serial_port.close()

if __name__ == '__main__':
    serial_communication()