I have 2 modules xbee XB24-Z7SIT-004,one connected to an Arduino UNO connected to a pc(win 7) whit a blank sketch and the other connected to a Raspberry PI type A. I tried to send strings by serial uart terminal in AT mode,setting Coordinator AT and Router At,destination addresses,pan id etc. and all works fine,but when I set their firmware to coordinator API and router API and try to send a hex string for test to one module in local,I receive no response. I tried for both modules whit this string "7E 00 04 08 01 4E 4A 0D" that is the command "node join" that should send back to me the node join date but none of them respond