How do I fix XBee ZB losing connection and not reconnecting?

XBee & XBee Gateway
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1

I have a very simple network of two XBees. One Coordinator and one sleeping end device. I have the same setup installed in a few locations.

After several weeks, I am finding that the connection is lost and they don’t seem to reconnect. Power cycling the coordinator doesn’t seem to lead to them reconnecting. They only reconnect when you reset the end device, but that is hard to do. This seems to remain true even after waiting for several days.

Any advice on how to diagnose the problem, or an actual solution would be greatly appreciated. Below are my end device settings:




  
    XB24-ZB_28A7.xml
    
      1111
      FFFF
      3
      0
      FF
      0
      0
      0
      0x20
      30
      0
      30000
      3C
      0
      3
      E8
      E8
      11
      4
      1
      0
      0
      
      6
      0
      0
      3
      1
      1
      64
      3E8
      2B
      5
      1388
      40
      1
      0
      0
      1
      0
      4
      0
      0
      1
      1
      0
      0
      1FFF
      0
      28
      1
      0
      0
      0
2

First, set your SP and ST time on the coordinator to match the SP and ST on your end device. Next make sure you are using the current firmware version for both devices and that should take care of it.