# Helios KWL 300 / Ventilation System / integration into Homey via MODBUS

**URL:** <https://community.homey.app/t/helios-kwl-300-ventilation-system-integration-into-homey-via-modbus/146477>\
**Category:** Devices\
**Created:** [December 6, 2025, 12:10pm UTC](https://community.homey.app/t/helios-kwl-300-ventilation-system-integration-into-homey-via-modbus/146477 "2025-12-06T12:10:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Christian\_Walter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/christian_walter/32/122021_2.png) [@Christian\_Walter](https://community.homey.app/u/Christian_Walter)\
**Post date:** [December 6, 2025, 12:10pm UTC](https://community.homey.app/t/helios-kwl-300-ventilation-system-integration-into-homey-via-modbus/146477/1 "2025-12-06T12:10:09Z")

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Hi, has someone successfilly integrated a Helios Ventilation System (KWL XXX) into Homey via MODBUS? I failed getting data via the MODBUS Application. Any tips or configuration examples?

MODBUS is activated in Helios Easy Controls.

Thx for help!

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**Author:** ![Christian\_Walter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/christian_walter/32/122021_2.png) [@Christian\_Walter](https://community.homey.app/u/Christian_Walter)\
**Post date:** [December 12, 2025, 5:05pm UTC](https://community.homey.app/t/helios-kwl-300-ventilation-system-integration-into-homey-via-modbus/146477/2 "2025-12-12T17:05:39Z")

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Dear All, I have successfully added my Solar System via Modbus (a little bit with try and error). Unfortunately I´m absolutely blind how I have to understand / transfer the MODBUS Defintion from Helios [https://www.easycontrols.net/de/service/downloads/send/4-software/16-modbus-dokumentation-für-kwl-easycontrols-geräte](https://www.easycontrols.net/de/service/downloads/send/4-software/16-modbus-dokumentation-f%C3%BCr-kwl-easycontrols-ger%C3%A4te) into Homey Language. Is anyone a ModBus Expert and can may be give me an example how the configuration should look like?

I have already created the MODBUS Device with the correct parameters.

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/1/f1e0e8b3f9105d901ca4aa5e30d2e0aa6ea55dda.png)

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<div class="post-metadata">

**Author:** ![Christian\_Walter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/christian_walter/32/122021_2.png) [@Christian\_Walter](https://community.homey.app/u/Christian_Walter)\
**Post date:** [December 21, 2025, 11:59am UTC](https://community.homey.app/t/helios-kwl-300-ventilation-system-integration-into-homey-via-modbus/146477/3 "2025-12-21T11:59:08Z")

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No MODBUS Expertes / Enthusiast online to support 🙂 ?