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  1. Replies
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    Yes, the c++ code is very modular and it can take...

    Yes, the c++ code is very modular and it can take a very, very long time to hunt down the exact details of command structures.

    Hopefully the example timed setpoint override with decode below...
  2. From your description of the problems it sounds...

    From your description of the problems it sounds like it's due to the messages sent from the controller not being received by the devices which would suggest that the problem is at the controller end....
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    Hi, I've self-installed my Evohome system with...

    Hi,

    I've self-installed my Evohome system with a gas boiler, so I'm not an expert. The BDR91s are used as switch controls for devices like valves and to provide boiler control (connected to its...
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    Yes, I think you've come to the correct...

    Yes, I think you've come to the correct conclusion. Unfortunately, Evohome isn't designed to control the boiler to the extent that you need. It can provide separate heating and hot water control...
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    Good idea, but no, the 3 bytes at the end of...

    Good idea, but no, the 3 bytes at the end of these shorter 7 byte messages always seem to be FFFFFF. The timed overrides are sent in longer 13 byte messages using the same command 0x2349. Most of...
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    Oh, I see what you mean. Sorry, you can ignore...

    Oh, I see what you mean. Sorry, you can ignore the specific first device ID and any 18:XXXXXX value should work with your nano serial device (obviously if you're using a HGI80 you must use 18:730). ...
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    Here's some info on the command structure for...

    Here's some info on the command structure for sending an immediate setpoint override to zone via a serial device which we've decoded:



    Example setpoint override message (command 0x2349):
    --- ...
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    Have you seen @dty's Github Evohome Node Red...

    Have you seen @dty's Github Evohome Node Red implementation?

    https://github.com/codeaholics/node-red-contrib-evohome

    He's taken a lot of the Evohome functionality that we've implemented within...
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    Good point Paul!

    Good point Paul!
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    Hmm. It sounds like the problem might lie with...

    Hmm. It sounds like the problem might lie with the BDR91 or its connection to the boiler rather than the controller as you've indicated that although the BDR91 is showing green, the boiler isn't...
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    Excellent! Glad you got it working and I'm...

    Excellent! Glad you got it working and I'm really happy that you were able to tweak it for your purposes. As this approach allows bulk changes to the entire Evohome schedule on a per zone basis, it...
  12. Thanks for confirming this. I've been wrestling...

    Thanks for confirming this. I've been wrestling with the heat demand data produced by the HCC80R for a long time and despite not having underfloor heating myself, I'd like to add it as a supported...
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    Yes, that looks OK (assuming you're using...

    Yes, that looks OK (assuming you're using Python). The data_out variable will be a string and then you need to process it in the following way (each block of 20 characters defines a setpoint). Note...
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    Yes, that pair of responses looks complete. Here...

    Yes, that pair of responses looks complete. Here are the 2 sections of the payloads which contain the schedule information:

    ...
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    Your data string doesn't look right and I've...

    Your data string doesn't look right and I've tried decompressing with zlib via Python and it returns an error. Do the spaces indicate the end of the data from each message? If so, it looks like...
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    @minthemerciless Great, thanks for the...

    @minthemerciless

    Great, thanks for the explanation of what you're implementing. I'd misinterpreted your earlier message and just thought you were trying to get the basic functionality working in...
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    @minthemerciless If you're using the Python...

    @minthemerciless

    If you're using the Python code for schedule backup from my Github area, it decodes the messages and stores all the setpoints in a TXT file. You'll see from the Python code that...
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    Thanks for sharing this info. It does sound like...

    Thanks for sharing this info. It does sound like the Lightwave Link Plus device replaces the Evohome controller rather than acting more as a gateway like other hybrid controllers/hubs which...
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    I'd use the Arduino IDE (download from their...

    I'd use the Arduino IDE (download from their website) and install it on whatever machine you have available to connect to your Nano. Once you've been able to successfully connect to the Nano within...
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    @minthemerciless, I haven't messed much with...

    @minthemerciless,

    I haven't messed much with Node Red, so can't tell you specifically where you'll need to tweak the configuration and I'm not 100% sure this is causing sending to fail. However,...
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    Hi, I agree with your second cable choice with...

    Hi,

    I agree with your second cable choice with an outer insulator for permanent installation. I've played around with different low voltage controls for my boiler and now use the Honeywell...
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    I've not had to navigate this problem, but I've...

    I've not had to navigate this problem, but I've seen that others have helpfully gone as far as creating a new email account e.g. gmail for the property and then transferring the system(s) to the new...
  23. Hi, I have the Glow Worm Ultracom2 30SXI and I...

    Hi,

    I have the Glow Worm Ultracom2 30SXI and I decided to try to upgrade to Opentherm based upon the fact that it appears to be an identical boiler to the AWB ThermoElegance 4 and the AWB...
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    Hi, Definitely the controller display. I'm not...

    Hi,

    Definitely the controller display. I'm not 100% sure about the temp displayed on the HR92s in this set-up, but I think it will also reflect the temp measured by the master.

    Dan
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    Hi, The 'No Sync' usually indicates that they...

    Hi,

    The 'No Sync' usually indicates that they aren't receiving messages from the controller. If you haven't made any recent changes to your set-up, I'd try moving the controller into the same...
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