-Compatible Webcam (list of compatible ones here) I'm using a Logitech C270.
-Powered USB Hub for Webcam (some of them can also be used to power the Raspberry pi as well!) List of compatible powered USB hub. I'm using a Plugable 7 Port USB from Amazon which I'm using to power the Raspberry pi itself.
Step 1: Setup Raspberry Pi Google Calendar
Follow Piney's direction's here.
NOTE: Skip the part about powersave/sleep since we are using webcam to control when monitor turns on and off.