Door open sensor checked when leaving

Hi Guys,

I have a brand new starter kit. I have the open/close door sensor working great and the presence sensor. What I want to do is when I leave the house by the front door, it checks if the back door sensor is open and notifies me. If it is closed then no action.

Try this app - Or if you are using SHM it will notify you if you system changes to away and a security contact is open