It's normal with Node working on battery. They are not always on line. You haveto press the inclusion button one time or three times (depend on the technical sheet) to wake up it just before to request something. Genarally, the node is wake up for around 10 seconds. But if you send new request at 5 seconds for exemple, it stay awake for 10 seconds more.
For reveive some status automatically, I think you have to set some node parameters. You have to read the technical sheet so.
Cheers
Dani