Remote Garage Door opener and notification

None needed - Cayenne does everything for you.
1) Install Cayenne app on your smart phone.
2) add device - search for raspberry pi
3) allow files to be installed
4) edit the dashboard to add a generic actuator - digital output
5) select appropriate channel - 25
6) add new widget - generic sensor, digital input
7) select appropriate channel - 23
8) That's it!