# KNX for Homey - It won't work!

**URL:** <https://community.homey.app/t/knx-for-homey-it-wont-work/37012>\
**Category:** Apps\
**Created:** [November 6, 2020, 4:27pm UTC](https://community.homey.app/t/knx-for-homey-it-wont-work/37012 "2020-11-06T16:27:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Crowntwig](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/crowntwig/32/29877_2.png) [@Crowntwig](https://community.homey.app/u/Crowntwig)\
**Post date:** [November 6, 2020, 4:27pm UTC](https://community.homey.app/t/knx-for-homey-it-wont-work/37012/1 "2020-11-06T16:27:27Z")

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Hi guys!  
New Homey owner here. Got it mainly because I recently bought a house with KNX. Downloaded the app and connected to the IP interface… and now I’m stuck.

I do not have an ETS license but I’ve gotten help to scale down the project file so I can use it in ETS Demo, which means I can find group addresses and such.

I can connect Homey to the IP interface and I can find, for example, a switch via “learn mode” and toggling the physical switch on and off or I can add the group address manually, it makes no difference:  
When I push the created virtual button in the Homey app, nothing happens. Well, almost nothing; I can see the red LED light (TX) flash on the physical interface every time I push the virtual button so I know Homey is sending something to the bus. The command never reaches its endpoint though.

I can’t scan the bus for traffic because when I do, I get an error message saying the interface can’t accept any more connections.

I can’t for the life of me figure out why this is not working.  
PLEASE help me, I’m getting desperate here…

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**Author:** ![ST\_IE\_NZ](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/st_ie_nz/32/40957_2.png) [@ST\_IE\_NZ](https://community.homey.app/u/ST_IE_NZ)\
**Post date:** [July 13, 2021, 11:02pm UTC](https://community.homey.app/t/knx-for-homey-it-wont-work/37012/2 "2021-07-13T23:02:09Z")

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@Crowntwig You probably need to download the application to the IP Interface. Often this will require a KNX USB Interface initially.