Hi Kurt, we are currently updating j1939 documentation and found following sentence: "When an empty address is assigned (ie. SA=0xff && name=0), a default is taken for the device that is bound to." Current code do not support it. Is it something what is needed and used in the practice? Oleksij. -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |