@property<EOL><INDENT>def firmware_version(self):<DEDENT>
return self._firmware_version<EOL>
The firmware version of the controller.

        :rtype: FirmwareVersion

        .. code:: python

            minor_version = int()
            mayor_version = int()

            assert message.firmware_version == (mayor_version, minor_version)
            assert message.firmware_version.major == mayor_version
            assert message.firmware_version.minor == minor_version