No, I mean use your connection to your home WiFi as a positive indicator that you are "present" (and vice versa when you leave home). You can use this driver to achieve it...
Don't worry that it says iPhone (if you are an Android fanboi like me). This driver will work with more or less all Android phones too. Just assign a fixed IP address at your router for your phone (and other family members too) and the device will register present (or not) when you are connected to the WiFi (or not). Bingo!
