# \[KNX\] How to setup a Dummy App in ETS and use it in OH

**URL:** <https://community.openhab.org/t/knx-how-to-setup-a-dummy-app-in-ets-and-use-it-in-oh/65012>\
**Category:** Bindings\
**Tags:** knx2\
**Created:** [January 21, 2019, 9:52am UTC](https://community.openhab.org/t/knx-how-to-setup-a-dummy-app-in-ets-and-use-it-in-oh/65012 "2019-01-21T09:52:50Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![halloween](https://community.openhab.org/user_avatar/community.openhab.org/halloween/32/7493_2.png) [@halloween](https://community.openhab.org/u/halloween)\
**Post date:** [January 21, 2019, 10:17am UTC](https://community.openhab.org/t/knx-how-to-setup-a-dummy-app-in-ets-and-use-it-in-oh/65012/2 "2019-01-21T10:17:29Z")

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Do you use a “firewall” in your knx installation (in german: linienkoppler)?

I don´t need any dummy app inside my ets. You can assign a knx-channel to a device by simply writing it inside the ets, not combine the two things with the mouse pointer.

Example:  
I have a presence sensor (non-knx) and this sensor gives a signal to openhab, when movement is recognized. Then openhab sends a “on” message to the knx-adress maybe 5/1/1. I combined my knx-actuator for my lights with this adress inside the ETS and so the light goes on, when there is any movement.

No need for dummy apps.

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