I’m just going to stick this here because it was really hard to find and it’s new information so it may be important for some people although I don’t know if it applies to your situation.
If you have the new ADT/SmartThings security panel, The arm/disarm concept for the ADT sensors works completely differently than smart home monitor does with the original smartthings hub. So that can make things even more confusing.
Assuming you have signed up for the ADT monitoring service, then…
The ADT panel has three armed states:
Disarm ( no alerts will be sent to ADT)
Arm Away ( events recognized by any of the ADT motion sensors or open/close sensors will be sent to ADT)
Arm Stay ( events recognized by the ADT motion sensors will be ignored, but events recognized by any of the ADT open/close sensors will be sent to ADT)
There is no custom notification option like there is with smart home monitor. And there are no zones.
Here’s the official support article, which is really hard to find. At present, if you just search for ADT you will get information about the hardware, but then you will get links to the SmartThings app which will give you information about smart home monitor instead of about the new ADT options. So I guess it just hasn’t been updated yet. But here’s the one and only page I saw which actually talks about the app for the ADT system.
Anyway, all of this is why it’s important for us to know which hub model you have and which sensors we are talking about in order to be able to help answer your questions.
If I’m wrong on how this works, hopefully someone who actually has the ADT system can correct this. 