I'm introducing into the Xbee world, and trying build a very simple network, with a controller and an endpoint.
All seems to be fine: open a console in Xctu or another terminal program, and when I write in controller's window, all characters appears in endpoint's window. But when I try in the other way, the first packets are lost.
I've tried to send a sequence of packets (by example, with ten characters in it), always loses the first X characters, in a range between 20 and 140 aprox.
The only way to avoid it is sending some characters from controller. Then, RSSI led is on in both devices, and endpoint can transmit without any loss.
I've switched the program in the two devices to discard some hardware faliure, but the result is the same.
Sorry for the complete-newbie question, but after hours of work, I'm totally stuck.