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Connecting multiple PICs

Discussion in 'Electronic Design' started by Glenn Ashmore, Jan 24, 2004.

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  1. First I have received several very generous offers from members of s.e.d
    to help me with the programming my remote light switch project and I
    greatly appreciate your help. But before I can send off the
    requirements I need to resolve a couple of things.

    Right now I have it working with two PIC 16F87x processors, one in the
    base switch and one in the remote, communicating via Linx 916Mhz
    tranceivers. The final system will have 3 remote stations. One at the
    navigation station, one in the cockpit and a portable one to carry in
    the dinghy. I can see how by sending a station address in the data
    stream multiple remotes can exist in the system. The base broadcast the
    system status every 30 seconds and the remotes send 4 byte command
    strings only when a button is pressed so collisions would be very rare.

    The thing is, these tranceiver modules cost $40 each and are not really
    needed or desired for the perminently installed remotes at the
    navigation station and cockpit. I would like to keep the programming the
    same on all stations and just eliminate the tranceiver on the fixed
    stations. Can I get by by just routing RX/TX/SDO/SDI to a modular jack
    and tying them to the base with CAT5? The wire runs would be about 30'
    max.

    --
    Glenn Ashmore

    I'm building a 45' cutter in strip/composite. Watch my progress (or lack
    there of) at: http://www.rutuonline.com
    Shameless Commercial Division: http://www.spade-anchor-us.com
     
  2. scada

    scada Guest

    You would have to try it! It may work, but for noise imunity and reliability
    run it through RS232, using the popular MC1488 and MC1489 chips, or the
    Max232 chip. Then use the cat5 run.
     
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