[CedarMadness]

This works if you have one of the wired systems, which are common on systems installed while the house was being built. All of the sensors are pretty easy to hook up, and there's even a DIY kit available from this company https://konnected.io/ if you're into that sort of thing

However, my alarm was added well after the house was built, and they used wireless sensors so they wouldn't have to open up any walls. These all use a proprietary protocol, which probably could be reverse engineered by someone smarter than me, but no drop in solutions exist. I am in the process of replacing all of them with Z-wave sensors to use with home-assistant, but removing them means re-painting all of the window trim.