I've two Xbee.. When both are ON , One with a computer and the other with just a power supply.. The coordinator sends data but the end device could not receive.
The end device receives data only when it is plugged into a computer with the program XCTU.
I believes that the end device is still SLeepingZZzzzzz.. lolZ..but the sleep configuration is on "NO SLEEP" mode.. What could be the problem?