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Thread: fun with evohome and rfbee

  1. #1
    Automated Home Lurker
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    Default fun with evohome and rfbee

    To investigate my problems with Opentherm/Evohome and my new boiler (ref. in another thread) I decided to get an RFBee and UartSBee.

    To my pleasant surprise, this took about ten minutes to get working. I flashed the Evohome Firmware to the RFBee, reset it and it started dumping out the RAMSES-II messages on the serial port. Using the documentation on gitlab I was able to manually decode the hex to understand the message. Since I am using a regular BDR91, an evotouch and a bunch of HR92s, the messages passing to and fro seem to be completely consistent with the documentation on the wiki provided by "evsdd".

    Rather than me decode the hex values by hand it would be handy if there was a script/tool that would sit on the serial port and decode each packet as it comes in - and even better, allow me to generate outgoing packets. Does such a thing exist ?

    My thinking here is to leave the evotouch in place to manage the heating, but to augment it with something like Domoticz which can log statistical information and also allow me to control the Opentherm DHW setpoint.

  2. #2
    Automated Home Guru
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    Have a search for evohome_rf or evohome-listener. They should be able to provide some of the functionality you're looking for. Evohome_rf can send messages too.

  3. #3
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    The device of choice is noW a NanoCUL because the evofw3 written by Pete has been optimised to work on it using the faster clock and the additional memory it provides.
    The evohome_rf is the decoder of choice as it is constantly maintained with the RF protocol as we learn more.
    Last edited by bruce_miranda; 22nd October 2020 at 02:36 PM.

  4. #4
    Automated Home Jr Member
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    Quote Originally Posted by bruce_miranda View Post
    The device of choice is not a NanoCUL because the evofw3 written by Pete has been optimised to work on it...
    Is there a typo in the first part of that post? Should it read now instead of not?

  5. #5
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    yes sorry. It is absolutely recommended

  6. #6
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    Thanks for this - I will try evohome_rf.

    Quote Originally Posted by bruce_miranda View Post
    The device of choice is noW a NanoCUL because the evofw3 written by Pete has been optimised to work on it using the faster clock and the additional memory it provides.
    Do you mind if I ask what "optimised" means here ?

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