Hi all, I'm creating an RS485 network consisting of a few devices, used for temperature sensing and control. I want this to be RS485 because it's simple and I already have the parts/protocols mostly in place. As of now, it does not need to be multi master, however, I want to leave the option open. 1. Should I use a half duplex or full duplex RS485 transceiver? I'm not really sure how full duplex RS485 would work for multiple nodes (4 or 5 nodes) and what the advantages would be. 2. Should I use twisted pair telephone cable or Ethernet cable? Or any other suggestions? 3. How should all of the "lines" be connected? How about a "junction box" which consists of a PCB with a bunch of sockets all connected together? It's simple and clean enough, but I don't know if the untwisted traces on the PCB will cause any trouble. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist