title: Xbee end nodes need a router to communicate with coordinator
body: <p>I have a network of Series 2 Xbees: one coordinator, one router and two end nodes (one end node receives data, the other sends).  If the device with the router is turned off, the communication between the coordinator and the end nodes doesn't happen.  The router and the coordinator are in the same room, so I don't think it's a signal strength issue.  I reset the coordinator and the end nodes and they still don't communicate.  They are all on the same PAN ID.</p>
  
  <p>Any suggestions/tips?</p>
  
  <p>Thanks</p>