stfc.ac.uk> writes: > So to do the autobaud you need a polled system, with a master device, but= can have multiple slave devices. > Instead of using RS232 as the physical layer you need something like CAN = or RS485 transceivers if you don't > use 'proper' LIN ones. You are right, there has to be some sort of conflict resolution, such as po= lled system. I do not see why RS232 cannot be used though, can you elaborate please?. RS232 is a physical layer only anyway, the communication protocol= is up to developer. Every packet can start/end with whatever sequence one des= ires to have. =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .