def start(self):
        """Start client."""
        self.proc = []
        for telldus, port in (
                (TELLDUS_CLIENT, self.port_client),
                (TELLDUS_EVENTS, self.port_events)):
            args = shlex.split(SOCAT_CLIENT.format(
                type=telldus, host=self.host, port=port))
            self.proc.append(subprocess.Popen(
                args,
                stdin=subprocess.DEVNULL,
                stderr=subprocess.DEVNULL,
                stdout=subprocess.DEVNULL
            ))
Start client.