Hello. I have comfo 350 luxe and have had problems with
my CC Ease Controller (12V), which turns on and off every 60 seconds. Impossible to use and it shows the same numbers.
no controlling functions.
Can You recommend how to replace it or fix it. It is impossible to get it in Norway.
I use it for Zehnder Comfoair 350
Will new Comfosense C work with my Comfoair 350. thanks in advance
Hello. I have comfo 350 luxe and have had problems with
my CC Ease Controller (12V), which turns on and off every 60 seconds. Impossible to use and it shows the same numbers.
no controlling functions.
Can You recommend how to replace it or fix it. It is impossible to get it in Norway.
I use it for Zehnder Comfoair 350
Will new Comfosense C work with my Comfoair 350. thanks in advance
There are two versions of the ComfoSense controller āZehnder ComfoSense Cā and āZehnder ComfoSenseā. You have to install the second one, without the āCā. It has replaced the CC Ease Controller controller a few years ago but is fully compatible.
Just one comment. Price of this device is so high (~200 EUR) that you could set up Home Assistant on a RPi and some tablet that you would install in place of the Zehnder controller 
With a bit of wiring you could control the ventilation from HA.
Does anyone know if itās possible and how to change precision level (to show decimals) in wichersās script? I am getting no decimals while some of you show screens with more precise readings
Did you manage to set the fan speeds using this interface?
Hi. No unfortunately I didnāt manage to set the fan speed via the RS485 interface. Tried some stuff, but unsuccessful until now. Hints welcome 
.
Hi mr wichers,
I am trying to use your comfoair integration i grabbed from github, i flashed esphome and installed the Lovelace Comfoair card in homeassistant.
But i keep on getting a empty card.
What am i doing wrong?
Grtz, edwin.
Hello,
I have the same problem. Iām searching for " current_temperature" but canāt find it. Where to change it ?
HI, itās been a while, COVID and some health related problems prevented me to attend the forum.
I wrote in the meantime some code to read from the server and export the data to mqtt, but Iām not a great fan of it. As I have installed Homeassistant and there is no mode to pilot the serial port based ventilation system, Iām going to have a look at writing an HA module, but not having any expertise in the HA engine, it will probably take some time to develop.
I see you are using 3 boards. An ESP board, a max2323 rs323 to TTL? And what is the other one? I would like to make this myself, I have the same whr950 ventilation box.
Here is what I used for my WHR 950: tieskuh/esphome-comfoair: ESPHome configuration to drive Zehnder WHR 950 (github.com)
Hello! Iāve assemled the components and I need to program it via esphome command line under Windows.
Iām getting an error while compiling which Iām not able to understand.
Can you please provide an easy how to guide to flash the esp32?
Any other method are also ok for me, just need a step by step guide. Thank you!
Dear @mog_wai @tieskuh @adorobis,
thank you for your previous work, so exciting to see the community come together to make the Zehnder units smart.
I have a WHR 950 Luxe R with an Artic 930 and a ComfoControl CC Luxe control panel that is connected via RS485 to the control board of the WHR 950 Luxe R. I want to integrate the WHR 950 and ideally the Artic 930 with Home Assistant, ideally using an ESP32 and ESPhome. For that I have bought a [Lilygo T-RSS3] (T-RS S3 ā LILYGOĀ®) (has isolated RS485 and RS232 interfaces) and flashed @tieskuh WHR 950 code on it.
Unfortunately, I am unable to physically access the internal WHR 950 control board and the RS232 DB9 connector on it in the core of the WHR 950 because the Artic 930 unit is stacked on top of the WHR 950 and makes the control board in the WHR 950 inaccessible. I have tried to slide the control board out of the WHR 950, to no avail. At least I got to change the filters :).
My last hope is that I can use the RS485 wires to the WHR 950 control board that the ComfoControl CC Luxe is connected with, which are easily accessible since the unit is mounted away from the WHR 950. I could just extend the bus or remove the ComfoControl CC Luxe, but keeping the CC Luxe in place and extending the RS485 bus to the ESP32 for HA for parallel operation would be preferred.
Do you have any advice on how to proceed here?
In a similar setup matsab.de writes that the RS485 protocol is different to the RS232 variant, I read that @adorobis supports RS485 in his code but could not find further documentation on how to connect via RS485 to the WHR 950 here GitHub - adorobis/hacomfoairmqtt: Home Assistant integration for ComfoAir 350 device via serial communication and MQTT. I have not found much on parallel operation of the CC controllers with the ESP32 connected via RS232 or RS485 either.
Any advice would be greatly welcomed. I cannot disassemble the WHR 950 and Artic 930 stack to access the control board but would love to read all the sensors of both units and control ventilation, temps, etc. If the ESPhome code does not work at the moment for RS485 interface that would be fine as well and I would use a Raspberry Pi with an RS485 interface and @adorobis code instead.
Best regards!
Board Layout of the WHR 950 attached for reference below.
