Post by thread:Simple network

One of my PIC projects needs a simple multiplexed network system bus for connecting 3 or 4 switching and instrumemtaton units to a control panel. Data must flow both ways through either a coax or a twisted pair. Data rate is about 5kbps and error detection or correction is needed. I'm sending commands to turn relays on and off from the control panel to the relay boxes and receiving instrumentation data and relay states (whether they are on or off) at the control panel frome the relay boxes. I've looked at CAN 2.0, seems overkill and expensive; J1850 (SAE), also seems too complicated; NMEA 0183 (marine standard0; only one way communications. I may just make something up but don't like to reinvent the wheel. Thanks. Dan Mulally spam_OUTdmulallyTakeThisOuTsilver.sdsmt.edu

<Dan Mulally expressed interest in a simple multiplexed network> Take a look at the EASY-A Multidrop Communications Protocol info on the New Micros web site. They include hardware notes and program listings. http://www.newmicros.com/eza1.html Cheers, Michael A. Tyborski WebWerx Milwaukee, WI