# KNX application not working

**URL:** <https://community.homey.app/t/knx-application-not-working/69197>\
**Category:** Questions & Help\
**Tags:** app\
**Created:** [September 20, 2022, 9:39pm UTC](https://community.homey.app/t/knx-application-not-working/69197 "2022-09-20T21:39:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Kjartans](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/kjartans/32/56497_2.png) [@Kjartans](https://community.homey.app/u/Kjartans)\
**Post date:** [September 20, 2022, 9:39pm UTC](https://community.homey.app/t/knx-application-not-working/69197/1 "2022-09-20T21:39:42Z")

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Hi,

I just bought Homey, and is trying to get it to work with my KNX system.  
Unfortently things are not working as they should. It seemd to me that Homey is not sending the packages correctly to the KNX bus.

To make it simple, I tried to set up a single switch, to turn a light off / on. To check whats going on, i`m connected to the bus with ETS and is watching the group monitor for traffic. When I am pushing the switch in Homey, I can see that it reaches the bus, and is sending the correct group address and status (on / off). However, the Service is marked as “From Bus”. So it looks to me, that its just reading values from the bus, and not actually sending the values to the bus. See attached screenshot, where you can see 15.15.21 is getting information from the bus, and therfore the light is not turned on / off. After that i tried to do the same thing in group monitor, where you can see 15.15.15 is actually sending the value “to bus” and therfore turning the light off / on.

Have anyone had the same problem, and know how to fix it?

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/f/9f9def33694c9fb939af9f836c4abf719bfc6f96.png)

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<div class="post-metadata">

**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\
**Post date:** [August 29, 2023, 11:55am UTC](https://community.homey.app/t/knx-application-not-working/69197/2 "2023-08-29T11:55:49Z")

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Hi,

This seems a bit tricky as I look at the search results:  
[https://community.homey.app/search?context=topic&context\_id=34814&q=Knx%20app&skip\_context=true](https://community.homey.app/search?context=topic&context_id=34814&q=Knx%20app&skip_context=true)

And, while Athom wrote the app, you’d best contact support also;  
How did I find that info:

> [@\[HOWTO\] Find app support topics or support links](https://community.homey.app/t/howto-find-app-support-topics-or-support-links/68698):
>
> (NL versie vind je [hier](https://community.homey.app/t/howto-uitleg-hoe-vind-je-het-juiste-app-topic-of-de-juiste-support-links/68702) ) Dear Homey and forum user, Try to ask your question, or post your message, into related topics please: There’s a system with dedicated forum topics for most apps. This way, you will be able to get support the quickest way, and to get directly in touch with fellow app users and the developer(s). If not, there are often alternative support links present, like email or github issue tracker. How to: 1.Goto the app store → [https://homey.app](https://homey.app) 2.Search for the app

**Edit** I just saw the question is from 11 months ago 🤗🍻