Digi XBee S2C Zigbee User Manual page 152

Manage End Devices
S2C Through-hole cyclic sleep pins
The following figure shows the cyclic sleep waveforms.
In the figure above, t1, t2, and t3 represent the following events:
t1 - Time when the device wakes from cyclic sleep
n
t2 - Time when the device returns to sleep
n
t3 - Later time when the device wakes from cyclic sleep
n
The wake time and sleep time are configurable with software commands.
Wake time (until sleep)
In cyclic sleep mode (SM = 4 or 5), if the device receives serial or RF data, it starts a sleep timer (time
until sleep). Any data received serially or over the RF link restarts the timer. Set the sleep timer value
with ST (Time before
ms to check its parent for buffered data messages. The device returns to sleep when the sleep timer
expires, or if it receives
XBee/XBee-PRO® S2C Zigbee® RF Module User Guide
Sleep). While the device is awake, it sends poll request transmissions every 100
SI (Sleep Immediately) as shown in the following image.
End Device configuration
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