Notification about the appearance of a specific mac address in the wifi network, how to implement?

Question

Email

Good afternoon. There is a goal to control the arrival and departure of the child home during working hours. Keeping in touch is not the solution. I would like to receive notifications about the appearance and disappearance of the phone in the home wifi network. At the moment, it looks like this, the network scanner is constantly running on the computer, and when a certain mas address appears, it sends an email. Router asus as66, access to the network, phone, computer is not limited. Prompt with what software it is possible to organize this business.

Answer 1

mikrotik + script
here is the article: https://tugibaev.ru/2014/04/dhcp-lease-mikrotik-no...

Answer 2

Umm. And it's not easier to make a static binding to the poppy address. And hang up the event about the lease of this address. In my opinion, this is easily implemented even on many wooden routers.