The easiest way to program an XBee is to use the XCTU software provided by Digi. Check out this guide for how to set up and program XBees

Setup one radio as an End Device with Pin Hibernate Sleep Mode Option and another XBee as a Coordinator with SN=0x10E0 and SP=0x7D0 for a 3 day end device timeout.  The End Device will be placed in the female headers of the circuit board and the Coordinator will connect inside the house to your home network.

 https://www.digi.com/wiki/developer/index.php/XBee_Sleeping_Problems