Configuring Modbus-Integration for Remeha Qinta Ace gas heating device

Configuration
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Hi klakol!
starting from your very hepful work i managed to get infos in HA from my De Dietrich Alezio heat pump.
Now i have some troubles with DHW tank temperature…do you had any luck with this regisrer value? I got always or 0 or invalid value. Just tried all device_class (int16, uint16, float16, etc…). or maybe do you found this information (DHW tank temperature) from other register…

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23

solved reading the equivalent register in Zone 2 so 1631 and 1632.

:wink:

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Is there a place where the whole connection chain from Quinta/ Elga Ace - GWT-08 - … HA is described?
Thanks

25

On tweakers (a Dutch site) there is some info.

https://gathering.tweakers.net/forum/list_messages/2099846 - perhaps using Google Translate you can manage? Otherwise feel free to drop me a line.

In my case i connected an esp wemos d1 to an RS485 interface which is linked in turn to the GTW-08. The gtw08 is connected to the Elga using the existing wiring (rbus?). Modbus implementation is complicated. Reading values works to a certain extent, changing settings is more difficult. Personally i am a bit underwhelmed by the end result

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Thanks!
This helps a lot. In my case I am also planning to use an ESP32 Arduino processor to collect the data. Basically reading is the first priority.
I am using the Arduino IDE. If you cound provide the code (as a scetch) it would help for sure!
Cheers
p.s.
In case you are waiting for a reply - I am off for the next two weeks

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I use esphome. Integrates nicely with HA

28

Hello! I’m Trying to do soemthing similar with Baxi and GTW-08 (Baxi uses same GTW) Someone has the complete Modbus code? With all parameters?

Thank you very much!

29

I was quite busy the last time; so I neglected the management of the Remeha interface. I just saw, that Home Assistent reports this error:

Invalid config for ‘modbus’ at configuration.yaml, line 578: remeha_FlowTemperatureReceived: count
illegal with data_type: int16 ‘modbus->0->sensors->0’,
got
{‘name’: ‘remeha_FlowTemperatureReceived’, ‘slave’: 100, ‘address’: 273, ‘count’: 1, ‘input_type’: ‘holding’, ‘data_type’: ‘int16’, ‘scan_interval’: 5, ‘unit_of_measurement’: ‘°C’, ‘state_class’: ‘measurement’, ‘scale’: 0.01, ‘precision’: 1},
please check the docs at Modbus - Home Assistant

Not sure, what caused this problem?

I found (my own :-)) repo, where I have stored the Modbus-Params in 2021:

I will have to recheck the interface.

30

Ok, got it. The modbus integration has evolved, the config entries retries and count have to be removed. The working config for me is now as such:

modbus:
  - name: waveshare_gateway
    type: tcp
    host: 192.168.1.224
    port: 502
    timeout: 10
    delay: 2
    sensors:
      - name: remeha_FlowTemperatureReceived
        slave: 100                 # GTW08 ModBUS-Adresse lt. Kodierrad Einstellung
        address: 273               # Modbus-Register-Adresse lt. Parameterliste, Decimal
        input_type: holding        # Holding register
        data_type: int16           # Modbus Datentpy lt. Parameterliste
        scan_interval: 5           # Der Master (also Homa Assistant) soll alle 10 Sekunden diesen Sensor abfragen
        unit_of_measurement: °C    # Erwartet wird eine absolute Temepratur in °C
        state_class: measurement   # Erwartet wird ein Wert mit Maß für eine Temperatur
        scale: 0.01                # Multiplikation mit 0.01
        precision: 1               # Eine Nachkommestelle (bei Int?)   
      - name: remeha_ReturnTemperatureReceived
        slave: 100
        address: 274
        input_type: holding
        data_type: int16
        scan_interval: 5
        unit_of_measurement: °C
        state_class: measurement
        scale: 0.01
        precision: 1
      - name: remeha_ApWaterPressure
        slave: 100
        address: 409
        input_type: holding
        data_type: int16
        scan_interval: 5
        unit_of_measurement: bar
        state_class: measurement
        scale: 0.1
        precision: 1
      - name: remeha_varApTOutside
        slave: 100
        address: 384
        input_type: holding
        data_type: int16
        scan_interval: 5
        unit_of_measurement: °C
        state_class: measurement
        scale: 0.01
        precision: 1    
      - name: remeha_varChCtrBurnerStarts
        slave: 100
        address: 419
        input_type: holding
        data_type: int32
        scan_interval: 5
        state_class: measurement
        scale: 1
        precision: 1    
      - name: remeha_varChCtrBurnHours
        slave: 100
        address: 421
        input_type: holding
        data_type: int32
        scan_interval: 5
        unit_of_measurement: h
        state_class: measurement
        scale: 1
        precision: 1  
      - name: remeha_varApChEnergyConsumption
        slave: 100
        address: 433
        input_type: holding
        data_type: int32
        scan_interval: 5
        unit_of_measurement: kWh
        state_class: measurement
        scale: 1
        precision: 1
31

Hey Ruben, i was trying to recreate your setup. What hardware did you use and how did you connect it ?

32

Hello!
Apart from making sensors and climate entities, have you managed to make switches or numerical entities to write on the thermos?

Thank you!

33

no, I am just monitoring some values, to see, if the system works

34

Ok. Thank you!