Configuration and commands Sleep commands
XBee®-PRO 900HP/XSC RF Modules
226
Bytes returned
1
SM (Sleep Mode)
Sets or displays the device's sleep mode settings, which configure the device to run in states that
require minimal power consumption.
By default, Sleep Mode is disabled and the device remains continually active. The SM command allows
the device to run in a lower-power state and be configured in one of the eight settings. Cyclic Sleep
settings wake the device after the amount of time designated by the SM command.
If the device detects a wake-up initializer during the time it is awake, it synchronizes with the
transmitter and starts receiving data after the wake-up initializer runs its duration. Otherwise, the
device returns to Sleep Mode and continues to cycle in and out of inactivity until it detects the Wake-
up Initializer.
If a Cyclic Sleep setting is chosen, the ST, LH and HT parameters must also be set as described in
Sleep mode.
Binary command
0x01
Parameter range
0, 1 3 - 8
Parameter Description
0 Disabled
1 Pin Sleep
3 Cyclic 0.5 second sleep (RF module wakes every 0.5 seconds)
4 Cyclic 1 second sleep (RF module wakes every 1.0 seconds)
5 Cyclic 2 second sleep
6 Cyclic 4 second sleep
7 Cyclic 8 second sleep
8 Cyclic 16 second sleep
Default
0
Bytes returned
1
ST (Wake Time)
Sets or displays the amount of time (in tenths of seconds) that the device remains inactive before
entering Sleep mode. For example, if you set STto 0x64 (100 decimal), the device enters Sleep mode
after 10 seconds of inactivity (no transmitting or receiving).
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