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XBee®/XBee‐PRO®RFModules‐802.15.4‐v1.xEx[2009.09.23]

©2009DigiInternatonal,Inc. 54

SM (Sleep Mode) Command

<Sleep Mode (Low Power)> The SM

command is used to set and read

Sleep Mode settings. By default,

Sleep Modes are disabled (SM = 0)

and the RF module remains in Idle/

Receive Mode. When in this state, the

module is constantly ready to respond

to either serial or RF activity.

* The Sleep Coordinator option

(SM=6) only exists for backwards

compatibility with firmware version

1.x06 only. In all other cases, use the

CE command to enable a Coordinator.

SO (Sleep Mode Command)

Sleep (Low Power) Sleep Options Set/Read the

sleep mode options.

Bit 0 - Poll wakeup disable

• 0 - Normal operations. A module configured

for cyclic sleep will poll for data on waking.

• 1 - Disable wakeup poll. A module config-

ured for cyclic sleep will not poll for data on

waking.

Bit 1 - ADC/DIO wakeup sampling disable.

• 0 - Normal operations. A module configured

in a sleep mode with ADC/DIO sampling enabled will automatically perform a sampling on

wakeup.

• 1 - Suppress sample on wakeup. A module configured in a sleep mode with ADC/DIO sam-

pling enabled will not automatically sample on wakeup.

SP (Cyclic Sleep Period) Command

<Sleep Mode (Low Power)> The SP command is

used to set and read the duration of time in which

a remote RF module sleeps. After the cyclic sleep

period is over, the module wakes and checks for

data. If data is not present, the module goes back

to sleep. The maximum sleep period is 268 sec-

onds (SP = 0x68B0).

The SP parameter is only valid if the module is

configured to operate in Cyclic Sleep (SM = 4-6).

Coordinator and End Device SP values should

always be equal.

To send Direct Messages, set SP = 0.

NonBeacon Firmware

End Device - SP determines the sleep period for cyclic sleeping remotes. Maximum sleep period is

268 seconds (0x68B0).

Coordinator - If non-zero, SP determines the time to hold an indirect message before discarding it.

A Coordinator will discard indirect messages after a period of (2.5 * SP).

AT Command: ATSM

Parameter Range: 0 - 6

Parameter Configuration

0 Disabled

1Pin Hibernate

2Pin Doze

3 (reserved)

4 Cyclic Sleep Remote

Cyclic Sleep Remote

(with Pin Wake-up)

6 Sleep Coordinator*

Default Parameter Value: 0

AT Command: ATSO

Parameter

Range:

0-4

Default Parameter Value:

Related Commands: SM (Sleep Mode), ST

(Time before Sleep), DP (Disassociation Cyclic

Sleep Period, BE (Beacon Order)

AT Command: ATSP