# Can’t get knx lights to dim

**URL:** <https://community.homey.app/t/can-t-get-knx-lights-to-dim/45324>\
**Category:** Devices\
**Created:** [March 27, 2021, 6:25pm UTC](https://community.homey.app/t/can-t-get-knx-lights-to-dim/45324 "2021-03-27T18:25:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Silas\_Fabry](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/silas_fabry/32/32464_2.png) [@Silas\_Fabry](https://community.homey.app/u/Silas_Fabry)\
**Post date:** [March 27, 2021, 6:25pm UTC](https://community.homey.app/t/can-t-get-knx-lights-to-dim/45324/1 "2021-03-27T18:25:28Z")

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Hi I already did read all the topics about knx but I still can’t get my lights to dim although I have te right groupadresses. Are there people with the same issue and maybe solved it?

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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, 10:36pm UTC](https://community.homey.app/t/can-t-get-knx-lights-to-dim/45324/2 "2021-07-13T22:36:00Z")

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For controlling dimmable lights in KNX you will generally require up to 5 group addresses:

1-bit Switch  
1-bit Switch Feedback/Status  
4-bit Relative Dimming (Brighter/Darker)  
1-byte % Value  
1-byte % Value Feedback/Status)