Smartthings ADT motion detector inactive

I have paired an ADT smartthings motion detector with the hub. The hub identifies it and on my app, it is logging motion; however, the app says that it is “inactive” and when I arm the security system, it does not activate the alarm when I walk in front of it (even though the app logs the motion). Anyone know how to make it “active” instead of “inactive”?

Thanks!

don’t know, but if it’s like “typical” wireless (battery-powered) burglar alarm sensors as this one appears to be, then it has a 3-minute re-trigger time. During which it may appear to be unresponsive, because it is preserving battery life.

regarding active/inactive , I have been ignoring it because the “inactive” sensors still work in my system.

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