I have a little trouble using XBees.
For one coordinator and one router, it’s able to send and receive packet in and frequency. For one coordinator (A) and some routers (B and others, all XBees are in the same panID), if I put B far from others XBee alone, the unicast from A to B does work. However, if I put B among other XBees, the unicast packet delays about 1 second. This situation only occurs in few routers.
I don’t know why the delay happens in this situation. Please help me.