AT commands Sleep settings commands
Digi XBee3® 802.15.4 RF Module User Guide
96
Parameter range
0 - 5
Parameter Description
0 No sleep (disabled)
1 Pin sleep
2 Reserved
3 Reserved
4 Cyclic Sleep Remote
5 Cyclic Sleep Remote with pin wakeup
Default
0
SP command
Sets and reads the duration of time that a remote device sleeps. After the cyclic sleep period is over,
the device wakes and checks for data. If data is not present, the device goes back to sleep. The
maximum sleep period is 4 hours (SP = 0x15F900).
The SP parameter is only valid if you configure the end device to operate in Cyclic Sleep (SM = 4-5).
Coordinator and End Device SP values should always be equal.
To send direct messages on a coordinator, set SP = 0. If the device is a coordinator (CE command = 1)
and SP is not 0, the device sends all transmissions indirectly, meaning end devices have to poll the
coordinator to receive data—FP (Force Poll) or using cyclic sleep.
End Device: SP determines the sleep period for cyclic sleeping remotes. The maximum sleep period is
4 hours (0x15F900).
Coordinator: If non-zero, SP determines the time to hold an indirect message before discarding it. A
Coordinator discards indirect messages after a period of (2.5 * SP).
Parameter range
0x0 - 0x15F900 (x 10 ms) (4 hours)
Default
0x0
ST command
Sets or displays the wake time of the device.
The ST parameter is only valid for end devices configured with Cyclic Sleep settings (SM = 4 - 5) and for
coordinators. Upon waking the device polls for queued indirect messages and UART data. If it does not
detect activity, the device immediately sleeps. The device only stays awake for ST time if RF or UART
activity is detected upon wakeup or bit 8 of SO command is set to 1.
Coordinator and End Device ST values must be equal.
Parameter range
0x1 - 0x36EE80 (x 1 ms)
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