Digi XBEE2 User Manual

Managing End Devices XBee End Device configuration
XBee/XBee-PRO ZigBee RF Modules User Guide 94
In the figure above, t1, t2, and t3 represent the following events:
 T1 - Time when the module wakes from cyclic sleep
 T2 - Time when the module returns to sleep
 T3 - Later time when the module wakes from cyclic sleep.
The wake time and sleep time are configurable with software commands as described in the sections below.
Wake time (until sleep)
In cyclic sleep mode (SM=4 or 5), if serial or RF data is received, the module will start a sleep timer (time until
sleep). Any data received serially or over the RF link will restart the timer. The sleep timer value is settable with
the ST command. While the module is awake, it will send poll request transmissions every 100ms to check its
parent for buffered data messages. The module returns to sleep when the sleep timer expires, or if the SI
command is sent to it. The following image shows this behavior.

Digi XBEE2 Specifications

General

Brand	Digi
Model	XBEE2
Category	Control Unit
Language	English