Digi-Frame A4 Multi-Purpose Especificaciones descargar pdf (Pagina 73)

XBee®/XBee‐PRO®SERFModules

©2009DigiInternational,Inc. 73

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 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.

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Digi-Frame A4 Multi-Purpose Especificaciones Pagina 73