Help with existing alarm system

Configuration
1

Hello, I recently moved in to a new rental which has an existing alarm system with battery powered sensors on all the doors and windows. I can’t see any useful labels on them to track down what wireless protocol they are using so I can try to get them integrated into HA, any suggestions?

One thing I did find was a US patent number which I looked up, it belong to Miele/Philips and talks about RF and something to do with masking of serial numbers or similar. Seems to imply some sort of secure protocol over RF? Not sure, I couldn’t find much else. Here is the patent: https://www.google.com/patents/US7120795

Is it possible to get these integrated in to HA somehow?

2

If you post a picture of one of those sensors maybe someone here could say “I know what that is, it’s a …”.

3

Maybe an FCCID number, as well…

4

I’ve managed to get the alarm control box open and figured out that it’s a Honeywell Vista 48. I think that means I will need to get an Envisalink device for a clean integration.