Siemens RVP330 and QAW70

Hello everyone, I would like to make my Siemens heating and hot water system smart.
I have a RVP330 controller of this type Smart Information Delivery (SID) with several connected temperature probes and two QAW70 room units of this type https://hit.sbt.siemens.com/RWD/ app.aspx? RC = IT & lang = IT & MODULE = Catalog & ACTION = ShowProduct & KEY = BPZ% 3aQAW70-A which control two different motorized three-way valves plus the various circulators (total 4 between hot water and heating).
For now I have only implemented a solution that checks and logs the status of some output relays from the control unit connected to the pumps and the boiler, but I would like to control at least the switching on and off of the two zones remotely and maybe see their status.
Has anyone already had experience with these devices?
Thanks in advance for your answers.

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hi there,
I have an old gas boiler/ heating system weishaupt wtg 18 and I’m trying to control the heating, but no luck so far.
I tried ebusd with the hope the boiler is talking to the Thermostat on ebus, but it looks like isn’t the case…
After some research it looks like it may use a proprietary protocol rvp, not documented publicly…
the thermostat QAA70.01/320 is from Landis & gyr which is Siemens now.

Did you hat any success with you work on interfacing rvp protocol? any hint is more than welcome.

Hi, I could not find information to interface with the BUS. I found that room units have a telephone contact for remote control, so I added a small zigbee actuator with clean contact and a temperature probe in the room, it’s not an elegant solution but it works.

I found in the meantime the solution: bsb-lan

It is a great project :grinning:, I got a very good support from the maintainer directly and made my old weishaupt wtg18 smart.

It requires a bsb-lan adapter with a esp32 microcontroller, it connects to the boiler on the same pins where the room thermostat is connected.

Now I get several sensors visible in HA and can control it with automations, I’m very excited how good this works.
This helps me control the boiler base on the demand of each smart room thermostat.