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I have a Xbee Series 2 in Coordinator AT which is connected to a computer, a Xbee Series 2 in Router AT which is connected to a breadboard and powered by Arduino's +3.3V and GND rails.

Coordinator AT

atid
2001
atsl
40A74613
atdl
40B19213

Router AT

atid
2001
atsl
40B19213
atdl
40A74613

When I use Coolterm to send the command ATND from the Coordinator XBee, theres no response from the Router XBee. Connecting pin 13 of the Router Xbee to an LED causes the LED to light up, so I guess the Router Xbee is powered properly.

ATND sent from the Coordinator AT

atnd
0000
0013A200
40A74613

FFFE
00
00
C105
101E
00030000

However when I also connect the Router Xbee to the computer (so both Xbees are connected to the computer), ATND does get a response from the Router XBee.

ATND sent from the Coordinator AT

atnd
0000
0013A200
40A74613

FFFE
00
00
C105
101E
00030000

3626
0013A200
40B19213

FFFE
01
00
C105
101E
00030000

How can I troubleshoot this problem?

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