# Heimdall - Let Homey watch over your home **URL:** \ **Category:** Apps\ **Tags:** app, official, security, homey-pro:mini:shs, heimdall\ **Created:** [August 22, 2018, 1:41pm UTC](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134 "2018-08-22T13:41:20Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![DaneedeKruyff](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/daneedekruyff/32/964_2.png) [@DaneedeKruyff](https://community.homey.app/u/DaneedeKruyff)\ **Post date:** [August 22, 2018, 1:41pm UTC](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134/2 "2018-08-22T13:41:44Z")
## FAQ > **Q.** My Homey Pro 2023 installed a new firmware version and now I have missing flow cards! How can I fix this? > **A.** This is due to installing firmware 12.2 in which Athom finally decided to handle Custom Capabilities the way it was in pre Homey Pro 2023 firmware. Please see [this post](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134/1552) on how to prepare or fix this. > **Q:** Do I really need the add the **Surveillance Mode Switch**? > **A:** Yes, it is necessary to add the **Surveillance Mode Switch**. It is needed to set the **Surveillance Mode** from a flow and can also be used on your mobile device to set the desired **Surveillance Mode**. > **Q:** What devices can I use as sensors for _ **Heimdall** _? > **A:** Any device that supports the _alarm\_motion_ or _alarm\_contact_ capability in Homey. Devices that support _alarm\_motion_ are for example motion sensors like the Fibaro Motion Sensor, Aeotec Multisensor or Xiaomi Human Body sensor but also smart doorbells like the Ring Video Doorbell’s or the Doorbird. Devices that support the _alarm\_contact_ capability are typical doorsensors like the Fibaro Door Sensor, Aeotec Recessed Door Sensor or Xiaomi Smart Door and Windows Sensor. > **Q:** I have a device that doesn’t have the _alarm\_motion_ capability, can I still use it with _ **Heimdall** _? > **A:** Yes you can. Just install a Virtual Motion sensor from the [Virtual Devices](https://community.homey.app/t/1723) app and set’s it value in a flow triggered by your device. How to do that is explained [here](https://community.homey.app/t/134/8). > **Q:** There are only three **Surveillande Modes** , **Disarmed** , **Partially Armed** and **Fully Armed**. I think I need more, can I add some? > **A:** No, three **Surveillance Modes** will be enough. You are are able to add and remove devices to/from a **Surveillance Mode** from a flow, making the combination of Armed zones unlimited. See [this post](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134/638) how to do that. [Go to opening post](https://community.homey.app/t/134) --- _[View the full topic](https://community.homey.app/t/heimdall-let-homey-watch-over-your-home/134)._