# Flow on sensors **URL:** \ **Category:** Questions & Help\ **Created:** [March 1, 2022, 5:57pm UTC](https://community.homey.app/t/flow-on-sensors/61219 "2022-03-01T17:57:56Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Matrean](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/matrean/32/122480_2.png) [@Matrean](https://community.homey.app/u/Matrean)\ **Post date:** [March 1, 2022, 9:31pm UTC](https://community.homey.app/t/flow-on-sensors/61219/2 "2022-03-01T21:31:36Z")
Hi @toch, There’re multiple ways to do this. My first suggestion would be to first create a group of your sensors with the group app. Which can be found here: [\< groep \> | Homey](https://homey.app/nl-nl/app/com.swttt.devicegroups/<-group->/) Create a group of your sensors Then create a trigger that if the group sensor go in alarm you active your sirene Another thing which would be good to explore is the heimdall app. Which is a very comprehensive security app with a lot of build in security and alarming features without you having to build to much flows > **[Heimdall | Homey](https://homey.app/nl-nl/app/com.uc.heimdall/Heimdall/)** > > Verander uw Homey in een bewakingssysteem At the link below you can find more information on the configuration and features of that app > [@Heimdall - Let Homey watch over your home](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134): > > This app enables you to use your Homey as a surveillance system. Supported languagesnetherlands Dutch uk English de German fr French it Italian sweden Swedish norway Norwegian es Spanish denmark Danish Links App Store: [Heimdall App for Homey | Homey](https://apps.athom.com/app/com.uc.heimdall) Github: [GitHub - daneedk/com.uc.heimdall: Heimdall for Homey](https://github.com/daneedk/com.uc.heimdall) issues: [GitHub · Where software is built](https://github.com/daneedk/com.uc.heimdall/issues) FAQ: [Heimdall - Let Homey watch over your home - #2 by DaneedeKruyff](https://community.homey.app/t/134/2) Change log: [Heimdall - Let Homey watch o…](https://community.homey.app/t/134/3) --- _[View the full topic](https://community.homey.app/t/flow-on-sensors/61219)._