# Redundantie aanwezigheid **URL:** \ **Category:** Vragen & hulp\ **Created:** [November 28, 2021, 4:43pm UTC](https://community.homey.app/t/redundantie-aanwezigheid/55621 "2021-11-28T16:43:21Z")\ **Posts on this page:** 1\ **Showing post:** 25
**Author:** ![Sapperdeflap](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/sapperdeflap/32/33985_2.png) [@Sapperdeflap](https://community.homey.app/u/Sapperdeflap)\ **Post date:** [November 30, 2021, 8:07pm UTC](https://community.homey.app/t/redundantie-aanwezigheid/55621/25 "2021-11-30T20:07:04Z")
Ik kwam net een ander topic tegen van een Homey app die vanuit honey kijkt naar telefoons verbonden met je wifi netwerk. Heb je daar misschien iets aan? > [@\[APP\]\[PRO\] Smart Presence](https://community.homey.app/t/app-pro-smart-presence/33794): > > Smart Presence Device Tracking: The app tracks devices by their IP address. You would need to set a static IP address for each device you want to track. This is necessary because if the device’s IP address changes (which can happen with DHCP), the app won’t be able to track it properly. Port Scanning: The app checks whether the specified devices are reachable on the network by attempting to connect to a specified port. Closed ports are often used for this purpose. When a device is con… --- _[View the full topic](https://community.homey.app/t/redundantie-aanwezigheid/55621)._