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Thread: HouseHeat system

  1. #31
    Moderator Kevin's Avatar
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    Quote Originally Posted by Hoo View Post
    I've been watching this thread in the hope that someone would have some luck with controlling the Househeat devices.
    The price of the system is good - and I haven't decided against it yet. It's affordable for experimentation.

    What I'm finding difficult (aside from the German) is pulling together information and deciding what interacts with what and who is actually producing and selling which bits . As such their interest in allowing protocol or API access has different priorities and different companies only represent certain product ranges. eQ-3 seem to be the main designers.

    The on the air protocol seems to be recoverable and reproducible using the TI chipset so that's one possibility - the DLL another assuming that software application works with this system - and reverse engineering the USB protocol another. There are several variants of the USB interface however (only 1 on the UK site) which concerns me .

    The lack of response to emails is not encouraging.

    K
    [edit] One criticism of the over the air protocol raised on that website was that it had no security, encryption , end point validation or sequencing - and that consequently commands could just be learned and resent. Assuming that actually you're not concerned with the ramifications of this within your home then this helps the cause in hacking the protocol or using something like RFXCom to be able to listen/send commands. I wonder wether Bert at RFXCom would be interested in supporting it in RFXCom - with maybe even a specific separate product (I'd buy one).
    Last edited by Kevin; 14th January 2009 at 05:44 PM.

  2. #32
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    from contronics.de:

    For Home Matic is a highly secure transmission method (AES) used, including safety-critical functions such as window and Türfunktionalitäten possible. The system is fully bidirectional: it "knows" the central states of all the actuators and sensors. The communications can be made through the specially designed for wireless home automation reserved area of 868 MHz and / or through a Leitungsbus done.
    so the new "Home Matic" system doesn't have the insecurity of the FHZ systems; you'd better get in while you can.

    I did find a german forum (probably run by ELV, a reseller) that lists a load of different systems, and attempts to make sense of all the different proprietary systems, which you might find useful.

  3. #33
    Moderator toscal's Avatar
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    Maybe the guys at RFXcom can help. They are always very approachable. If it could be done by them then this would open up all sorts of possibilities.
    Bert are you listening.
    IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
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  4. #34
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    So does anyone know if the Househeat system is the old open protocol or the new secure one?
    It looks like Househeat is just some pretty standard German devices, rebranded for the UK. I'm now wondering if I'd be better off tackling the German and getting devices from over there that I know are the old protocol. Considering Househeat's lack of response to enquiries, I wonder how secure the company is. I want to buy a modular system that I can expand later, but if the only company that produces a compatible module goes under, I'm left with a system that can't be expanded.

  5. #35
    Moderator Kevin's Avatar
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    I am now in communication with them - or at least their sales office in Denmark. They were most helpful and sounded interested in the questions I asked and have asked I email them and they will get the appropriate people to respond. I'll keep you updated.

    The HouseHeat system does not integrate with the HomeMatic system btw. In a way that may make them more willing to consider opening up HouseHeat for integration with 3rd party applications as they must see that being an island with no integration possibilities limits their market.

    K

  6. #36
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    Hi Kevin can you PM me their email address please.
    IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
    www.casatech.eu Renovation Spain Blog

  7. #37
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    The sales guy - who was contacted via their web page email is sending my questions to a tech guy to respond - so when he does I'll update you..

    K

  8. #38
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    From the Homeseer site:

    Apparently someone worked out the protocols for the house intelligence stuff.

    http://fhz4linux.info/tiki-index.php...Z1000+Protocol

    Bert does that help you guys @ RFXCOMM???

  9. #39
    Moderator Kevin's Avatar
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    I don't think RFXCom are aware of this product or this thread... maybe somone could contact Bert if they are interested...

    The reverse engineered protocol is also an older one I believe (unfortunately the link you posted is bad.. do you have some new info ?).

    On the more positive side I am in contact with a HouseHeat tech guy and they have an XML interface on the horizon - and the HouseHeat system does integrate with HomeMatic so you can use their API/DLL. However you need those extra components of course.

    K

  10. #40

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