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Thread: Multiple CM12Us On Same PC

  1. #1
    Automated Home Lurker
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    Default Multiple CM12Us On Same PC

    Hi

    Does anyone know whether it is possible to have multiple CM12U PC Interfaces on the same PC (and connected to the same house wiring).

    I have a CM12U running with Homeseer software. I am also thinking about running Incontrol Quadcam on the same PC. Each package will expect to see a CM12U on its own dedicated Com Port.

    Is there any way to share a CM12U between the two apps? Or do I need 2 CM12Us - I am led to believe that two CM12Us on the same house wiring may intefere with one another! Is this correct?

    Any info / tips would be most helpful.

    TIA

    crozzo 8)

  2. #2
    Automated Home Sr Member jon00's Avatar
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    Default Re: Multiple CM12Us On Same PC

    Hi Crozzo,

    You will need a second CM12 as Homeseer will have exclusive use of the com port (to listen/update & transmit X10).

    There should be no issues in running more than one CM12 on different ports. By the very nature of the X10 system, if both wanted to transmit at the same time, one would wait until the power line is free of X10 signals.

    Before I purchased a proper X10 repeater, I actually used a second CM12 as a pseudo repeater with no problems at all.

  3. #3
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    Default Re: Multiple CM12Us On Same PC

    Thanks for the info Jon - most helpful as usual!

    Nick 8)

  4. #4
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    Default Re: Multiple CM12Us On Same PC

    They say:
    "Shared Serial Ports is an advanced utility, the purpose of which is to share real serial ports between multiple applications in the way, that all applications will receive same data from real serial port simultaneously. It is achieved by creating virtual serial ports, which are same copies as real one. Each application will think that it is working with serial port in exclusive mode. All virtual serial ports will be able also to send data to real serial port. Also, you will be able to set permissions to read, write or change control lines state for every application separately"

    @:
    http://www.eltima.com/products/serialshare/

    HTH - Haven't tried it, but would assume as said that the limiting factor here is the waiting for X10 signals to expire.
    **Signatures reduce bandwidth**

  5. #5
    Automated Home Jr Member
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    Default Re: Multiple CM12Us On Same PC

    The software solution suggested above seems the most sensible way. However I guess the following may also work:

    + Connecting the CM12U to an RS232 to IP convertor as many allow multiple connections and they usually come with virtual com port redirector software
    + Simple hardware switching with 1 CM12U going to 2 serial ports

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