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Hi everyone, I'm using an ST-340 V2 connected to a Wanas Recuperator and have been exploring how to integrate it with Home Assistant. Currently, I can only read sensor data with no control over the device. Here's what's accessible: Bypass: State only Has anyone been able to successfully add control functions to this model or a similar setup? Any advice or updates on this topic would be greatly appreciated. It would be great to extend our capabilities beyond just monitoring these states. Looking forward to any suggestions or progress in this area! |
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Modbus connection would be superior (because local). I am using my recuperator (Komfovent R-400-H) like so: https://github.com/anarion80/hass-config/blob/master/packages/komfovent_recuperator.yaml But you need to know the registers, like so: https://komfovent.com/en/downloads/MODBUS_connection_C6_EN.pdf |
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I'm useing WANAS COMBO 630 XF and I have modbus registers and presets for it See here: https://www.wanas.pl/wp-content/uploads/2025/04/Instrukcja-instalacji-i-obslugi-Combo-630.pdf |
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Hi @chuchlaster I have a WANAS 555 XF connected to a WANAS Maxi R32 chiller. My setup is very similar to yours, and I’d really like to take control over the recuperator instead of just reading sensor data Could you support me with a step-by-step guide to set up the Modbus connection? I’d really appreciate it – even basic instructions on registers, wiring, and HA configuration would help a lot Thanks in advance! |
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You need some RS232/485 to wifi converter (I'm useing Waveshare) and some 4-channel potential-free relay - connections and modbus parametres and registers you have in INSTALLATION AND OPERATING MANUAL of your recuperator. And one thing - If you have wifi connection with you recuperator you have to unplug it. You can use either modbus or wifi - not both... Potential free realy is used to turn on 1 and 3 airflow rate and for "open window" mode All ports on recuperator main board should be described |
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Hi @chuchlaster Thanks a lot for the inspiration 🙏 the Modbus works super well now... Quick question: what potential-free relay are you using? Do you have a specific model? I’ll probably need to go Tasmota or Zigbee since I don’t have any extra cables running up to the attic where the recuperator is… and via Modbus there is no rational way to control the fans :( |
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Hi Mariusz,
I have the ST-340 recuperator controller. I can download data via php to Home Assistant but I can't control (change speed, turn on off, etc.). Any chance to add this model to your component?
I am sending json data:
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