> You can't use packets with RS485 because there is a different way how to > share a bus. The RS-485 "standard" neither requires nor disallows packets. It is an electrical spec only, and leaves the protocol up to the implementor. One RS-485 system I designed did in fact use packets. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu