Hello Bernhard
I am currently just do some testings with writing values over modbus tcp. At the end i like to make a smart grid setup with home assistant. That means if i make enough energy with my solar panel i like to set the smartgrid status to “vorzugsbetrieb”.
here the description from hoval:
Hello jgold
Thank you for the template, thats excatly what i was looking for (even in german) 
Where did you find the status code definitions?
The Status Code definitions can be found here for endcustomers:
https://library.loxone.com/detail/template-hoval-at-769/overview
Here you can find the status codes for Heating Circuits, Domestic Hot Water Ciruits, Heating Buffers, Heating generators like heatpumps or directly from the automat WFA 200 for example (for Ultra Source or Belaria machines).
If you download the [Loxone Config] and input the template, you can find all status datapoints. (https://www.loxone.com/dede/support/downloads/)
Normally the Status Codes are hidden in the service manuals of those modules like “TTE-WEZ” , “TTE-PS” or “WFA 201” for example.
On behalf of Hoval Product Management
Maximilian Stoll
Modbus-Integration für Hoval-Anlagen leicht gemacht | Hoval Corporate
Sorry only in german.
For all of you who need help to write target values on our Hoval sources or ventilation systems.
Use Case 3 & 4 is NOT recommendet! Mostly in use for big gasheaters in industrial plants!
Always use UseCase 1 or 2 for Heating, Cooling & DHW Preparation.
In behalf of product management Hoval
Greetings Max Stoll
Hi Max, can you elaborate more what Hoval is planning here?
Are you planning a full integration of Hoval heat pumps in Homeassistant?
Or would it still be based on the generic modbus integration described here?
What are Hoval’s timelines for such an integration?
I have a Hoval Belaria heat pump and a Huawei PV inverter. The inverter is already integrated with HA via modbus TCP and now I am contemplating if I should get the Hoval modbus gateway to also integrate the heat pump.
Hello,
i’m looking for how to connect my Hoval HomeVent FR251 with TopTronic e and Gateway (TTE-GW, S-Version: 2.34.006, HW-Version:1.0) to HA. After some tests with an old CAN BUS RPI hat, i have now come across this threat. Unfortunately, I can’t turn on the ModBus in the gateway. Does anyone here have an idea if and how this works?
I am glad to read that Hoval is also involved here! Thank you Max!
Unfortunately, the web interface (Hoval Connect) is no longer really usable.
That’s really great to read here! Now I just have to get the Modbus up and running.
Kind Regards!
Hello fozziebear80,
You have a normal Hoval Connect Gateway LAN or WLAN. This means you have the wrong software and you need a Hoval Modbus Gateway (part number 6049501).
I would recommend that you sell your old gateway second-hand and get the Hoval Modbus Gateway with the correct software.
Then you can enable Modbus TCP or RTU.
There is no way around it.
Hello andrusalem,
We are not planning full integration in HomeAssistant.
We only want to prepare examples (templates) for “Heating and Cooling” i.e. heat pumps such as Belaria pro comfort or Ultra Source and “Ventilation” i.e. ventilation units such as FR, FRT, ER, ERT and in future present ourselves as an open manufacturer that prepares templates for several third-party systems. We have already done this successfully with Loxone
We are looking for reference customers who we can support technically with the integration and in return the Home Assistant programmer makes his code and experience available.
Because we at Hoval do not program HomeAssistant.
We will only collect the experience reports and publish them on our website.
Greetings Max
on behalf of Hoval Product Management
With this additonal entries in the configuration.yaml i am able to control the room target temperature and the hot water target temperature for my belaria (thanks @jgold and @max_stoll for your help).
climates:
- name: Hoval Raum-Soll Climate
address: 1493 # Actual room target temperature HC1 - use if no room sensor
target_temp_register: 1481
scale: 0.1
precision: 1
temp_step: 0.5
min_temp: 10
max_temp: 30
hvac_mode_register:
address: 1501
values:
state_off: 0
state_heat: 1
- name: Hoval Warmwasser-Ist SF Climate
address: 1500 # Current hot water temperature
target_temp_register: 1497
scale: 0.1
precision: 1
temp_step: 1
min_temp: 10
max_temp: 70
hvac_mode_register:
address: 1504
values:
state_off: 0
state_heat: 1
