That would be really interesting thing to do. Did you have any success? Otherwise you can build all the smart control by humidity/co2 logic to HA as well.
I have solved it by introducing a pwm converter connected to esp32. Esp32 reads data from Netatmo inhouse air quality monitor towers. Values are then converted to voltage by help of mentioned pwm converter and feeds that value into dedicated input on C6 board for CO2. Theres a defined range from 0 to 10V that you can feed into C6 controllers CO2 . Asked also if CO2 values can be sent via modbus. Komfovent technicians said it is not possible
Could you post a bit more detail, please? Could you do the the same for a particulate sensor?
It has 2 connections B8 and B9. Both B8 and B9 are described to be Air quality / Humidity sensors. You can only tell your komfovent what type of sensor is connected inside your settings and then pass it a value of 0-10V. I will show my solution later.
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How did you calibrate the voltage?
Iāve gotten an updated C6 Modbus document, if it helps anyone. It has a few new entries, like āConstant heat recoveryā.
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I get a lot of modbus errors. Running latest HA.
Logger: homeassistant.components.modbus.base_platform
Source: components/modbus/base_platform.py:178
Integration: Modbus (documentation, issues)
First occurred: 9:49:14 PM (365 occurrences)
Last logged: 10:01:13 PM
Received 4 bytes, unpack error unpack requires a buffer of 2 bytes
Does anybody have the same?
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I have the same. Any ideas?
Here is a configuration that works. Some data_types were not defined before.
modbus:
- name: Komfovent
type: tcp
host: 192.168.1.247
port: 502
switches:
- name: "Komfovent Auto Mode"
slave: 1
address: 3
command_on: 1
command_off: 0
- name: "Komfovent Power"
slave: 1
address: 0
command_on: 1
command_off: 0
- name: "Komfovent Eco Mode"
slave: 1
address: 2
command_on: 1
command_off: 0
sensors:
- name: "Komfovent Power"
address: 0
scan_interval: 10
- name: "Komfovent Eco"
address: 2
scan_interval: 10
- name: "Komfovent Mode"
address: 4
scan_interval: 10
- name: "Komfovent Auto"
address: 3
scan_interval: 10
- name: "Komfovent Shedule"
address: 5
scan_interval: 10
- name: "Komfovent Status bit mask"
address: 899
scan_interval: 10
- name: "Komfovent Supply temperature 'C"
address: 901
scan_interval: 10
unit_of_measurement: Ā°C
scale: 0.1
precision: 1
device_class: temperature
- name: "Komfovent Extract temperature 'C"
address: 902
scan_interval: 10
unit_of_measurement: Ā°C
scale: 0.1
precision: 1
device_class: temperature
- name: "Komfovent Supply Fan Intensivity '%"
address: 909
scan_interval: 10
unit_of_measurement: '%'
scale: 0.1
precision: 1
- name: "Komfovent Extract Fan Intensivity '%"
address: 910
scan_interval: 10
unit_of_measurement: '%'
scale: 0.1
precision: 1
- name: "Komfovent Outdoor temperature 'C"
address: 903
scan_interval: 10
unit_of_measurement: Ā°C
scale: 0.1
precision: 1
device_class: temperature
- name: "Komfovent Filter Impurity, %"
address: 916
scan_interval: 10
unit_of_measurement: '%'
- name: "Komfovent Heat exchanger, %"
address: 911
scan_interval: 30
unit_of_measurement: '%'
scale: 0.1
precision: 0
- name: "Komfovent Heating power, W"
address: 912
scan_interval: 10
unit_of_measurement: W
device_class: power
- name: "Komfovent Power consumption, W"
address: 920
scan_interval: 10
unit_of_measurement: W
device_class: power
- name: "Komfovent Power consumption Month, kWh"
address: 928
scan_interval: 10
unit_of_measurement: kWh
data_type: 'int32'
count: 2
precision: 0
scale: 0.001
state_class: total_increasing
device_class: energy
- name: "Komfovent Power consumption Total, kWh"
address: 930
scan_interval: 300
unit_of_measurement: kWh
data_type: 'int32'
count: 2
precision: 0
scale: 0.001
state_class: total_increasing
device_class: energy
- name: "Komfovent Heating Recovery Month, kWh"
address: 940
scan_interval: 10
unit_of_measurement: kWh
data_type: 'int32'
count: 2
precision: 0
scale: 0.001
device_class: energy
- name: "Komfovent Heating Recovery Total, kWh"
address: 942
scan_interval: 10
unit_of_measurement: kWh
data_type: 'int32'
count: 2
precision: 0
scale: 0.001
state_class: total_increasing
device_class: energy
- name: "Komfovent Heat Recovery, W"
address: 922
scan_interval: 10
unit_of_measurement: W
- name: "Komfovent Heat exchanger efficiency, %"
address: 923
scan_interval: 10
scale: 1
precision: 0
unit_of_measurement: '%'
- name: "Komfovent Energy saving, %"
address: 924
scan_interval: 10
- name: "Komfovent Specific power (SPI)"
address: 925
scan_interval: 10
scale: 0.001
precision: 2
it works! thanks!
Iāve defined significantly more sensors in my config ha_komfovent_config/komfovent.yaml at b07cb34cdd3265460e9d3d5433c904a919fb91a6 Ā· borpin/ha_komfovent_config Ā· GitHub and they have data_type defined. I also define the device_class, measurement_class and state_class if appropriate.
I do get SlaveBusy errors about once or twice an hour, but that is the nature of Modbus and I am polling it quite hard.
Iāve got an error in one of the automation ATM but you donāt have to use those (I use them for increasing and decreasing the fan speed).
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Impressive work you have fone! Can you please share the locelace card as well?
Nice! One question, which sesnor should I use to Energy dashboard?
I have just published all my cards (they do various things) and some images in the readme of those cards. GitHub - borpin/ha_komfovent_config: Set of files for configuring MODBUS connection to a Komfovent Unit. There was a brief UI YAML file there already.
It depends what you want to show 
Iād suggest the ahu_consumption_total as this is the total consumption. It should be configured correctly to work with the Energy dashboard.
I donāt think these come from my config.
Note
I have just pushed a major revision of the YAML to what I am currently using. The GitHub version had got rather out of date.
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Thanks! Looks like yout komfovent.yaml has everything double. Maybe some copy-paste error?
Also where to use cards yaml?
Yes, made a right mess of that.
It just needs to be added to the lovelace dashboard config. It isnāt an add-on card, just the config Iām using.
Hi! Iām very new in HA stuff. Thanks for your work in integration of komfovent unit. Please, if you can, make a tutorial how to implement this files, for newbies.
Here is a great tutorial: GitHub - borpin/ha_komfovent_config: Set of files for configuring MODBUS connection to a Komfovent Unit
2 Likes
Hello,
I noticed that in log always appearing this error:
āPymodbus: komfovent: Exception Response(131, 3, SlaveBusy)ā
Maybe somebody know whats the problem?