Honeywell sa5882

I have this as part of my security system that I no longer use. I have started to use ST_Anything” Arduino/ThingShield Project and would like to integrate this unit. However I am not sure how to determine what that device is sending to the main board in order to use it. Can anyone give me some advice to determine the output of this device?

Since I am not a Arduino expert and only use others code I would like to figure out what the output of this unit is so that I can use it in other applications. If I can find a basic Arduino code to see what is being outputted that would be great. Anyone have any suggestions?