import serial
import io
import time

class my_serial():
    def __init__(self, port, baud_rate):
        self.serial = serial.Serial(port, baud_rate, timeout=1)
        self.serial_io_wrapped = io.TextIOWrapper(io.BufferedRWPair(self.serial, self.serial))

    # receive message via serial
    def read(self):
        read_out = None
        timeout = time.time() + 0.1
        while ((self.serial.in_waiting > 0) and (timeout > time.time())):
            pass
        if self.serial.in_waiting > 0:
            read_out = self.serial_io_wrapped.readline()
        return read_out

ser = my_serial('/dev/ttyUSB0', 9600)

while True:
    incomingMessage = ser.read()
    if incomingMessage is not None:
        print(incomingMessage)