Add timeout support

        then we don't warn when ports are opened multiple times.

        """

        with self.communications_lock:

            logging.debug(f"Opening port {port}")

            if hasattr(self, "_ser") and self._ser.isOpen():

                if not quiet:

                    logging.warning("Attempted to open an already-open port!")

            assert (

                self._ser.isOpen()

            ), "Attempted to write to the serial port before it was opened.  Perhaps you need to call the 'open' method first?"

            logging.debug("Encoding message...")

            data = query_string + self.termination_character

            data = data.encode()

            logging.debug(f"Writing message: {data}")

            self._ser.write(data)

            logging.debug("Write successful")

    def flush_input_buffer(self):

        """Make sure there's nothing waiting to be read, and clear the buffer if there is."""

    def readline(self, timeout=None):

        """Read one line from the serial port."""

        self._ser.timeout = timeout

        with self.communications_lock:

            return (

                self._ser.readline()

        """

        with self.communications_lock:

            self.flush_input_buffer()

            logging.debug(f"Writing query: {queryString}")

            self.write(queryString)

            logging.debug("Waiting for query response...")

            if self.ignore_echo == True:  # Needs Implementing for a multiline read!

                first_line = self.readline(timeout).strip()

                if first_line == queryString: