Please expand on this concept a little more to help me understand the idea. I am not sure how ST_Anything would play into this concept? Do you want your Hubitat Hub to actively look for your phone to be on the home network? Or, do you want your phone to send some information to your Hub when it is on the home network?
Are you an Android or iOS user? If Android, can can use Tasker to call the Hubitat Maker API to update a virtual presence device. I believe you could have Tasker use the connection to your home WiFi as a trigger, or a Geofence.
If iOS, you could try Locative as I explained in this post...
