Digi International Inc XBEEPRO2 Manual Do Utilizador

When a command is sent to the module, the module will parse and execute the command. Upon 
successful execution of a command, the module returns an “OK” message. If execution of a command 
results in an error, the module returns an “ERROR” message.

Applying Command Changes 

Any changes made to the configuration command registers through AT commands will not take effect until 
the changes are applied. For example, sending the BD command to change the baud rate will not change 
the actual baud rate until changes are applied. Changes can be applied in one of the following ways:

•The AC (Apply Changes) command is issued.
•AT command mode is exited.

1.    Send the ATCN (Exit Command Mode) command (followed by a carriage return).

       [OR]

2.    If no valid AT Commands are received within the time specified by CT (Command Mode Timeout) 
Command, the RF module automatically returns to Idle Mode. 

For an example of programming the RF module using AT Commands and descriptions of each config-

urable parameter, please see the Command Reference Table chapter.

Sleep modes allow the RF module to enter states of low power consumption when not in use. The XBee RF 
modules support both pin sleep (sleep mode entered on pin transition) and cyclic sleep (module sleeps for a 
fixed time). XBee sleep modes are discussed in detail in chapter 6.