Hi, You remember me, I'm the beginner planning a HA system. :) So. I'm going to link pics together via RS-485 bus (using for example MAX487). How fast can I expect to be able to run the bus, 10kbps, 100kbps? I think I'll use the 16f87x pics which run at 20 MHz. I think the distance won't be the problem as the total physical length of the bus will be about 200-300 feet (max). Thank you. Regards -- Markus Vuori | ASCII ribbon campaign ( ) Jyvdskyld, Finland | - against HTML email X mm@vuori.net.NOSPAM | & vcards / \ -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body