Reinstalled Asusrouter doesn't detect several devices

Configuration Blueprints
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1

I did remove Asusrouter Integration resulting in removed devices/Entities as well.
When reinstalling Asusrouter it creates 8 of previously 12 devices. Thoas 8 are mixed from Wifi and LAN as well. Missing are all smartphones and thus their trackers I use for person presence. Missing devices are visible in Router and have data-traffic as well.

Reboot, Home assistant, reload Asusrouter integration, reboot Router itself does not change anything. Also I tried integration ASUSWRT which created the same devices (with less entities) Looking in the diagnostics file of the ASUSWRT Integration I find e.g. one of my mobile devices in tracked Devices with name, IP-addrss and last_activity timestamp, but no device nor tracker for the device

All the devices - those recognized and those missing are assigned via DHCP Server .
Any ideas for the cause and even better for a solution ?

2

See this topic: Openwrt presence without DHCP active - #2 by pdwonline

3

Thanks a lot! I was not aware of the integration Network Scanner and its usecase presence detection. I allready installed and got 16 devices (AsusWRT found only 8 Devices). I will continue with your template later on.

Neverthelees this proposal solving my presence problem, I am still interested why AsusWRT (and asusrouter) Integration both to not recognize some devices. Furthermore I cannot determine certain propoerties - missing are devices from LAN and Wifi as well, available are also Devices from LAN and Wifi as well. All the 16 Devices are bound to IP and Mac Adress by DHCP-Server.

Any ideas/solution are highly appreciated