On Mon, May 4, 2009 at 7:15 PM, Olin Lathrop wr= ote: > Xiaofan Chen wrote: >> CAN is limited to 1Mbps. > > Yes, but it's probably a good idea to run it slower. =A0Remember, he's re= ading > temperature sensors. =A0NMEA2000 specifies 200KHz as the bit rate. =A0If = that's > good enough to use over the length of a oil tanker with a tight physical > spec, then it should leave some margin for using in a house with a little > slop in the physical implementation. You are right here. >> RS485 can usually go much faster. Profibus >> uses RS485 and can go up to 12Mbps. We use RS485 as one of >> the backplanes which goes up to 16Mbps and use proprietory upper >> layers. =A0On the other hand, we have backplanes which is based on >> CAN and use DeviceNet/CIP as the upper layer. > > I think you're confusing more than illuminating with this. =A0Keep it sim= ple. > You may be right here as well. But I am not convinced CAN is simpler than RS485. So if you really want to keep it simple, RS485 may be the way to go. -- = Xiaofan http://mcuee.blogspot.com -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist