Digi XBee User Manual download pdf (Page 9)

XBee®/XBee‐PRO®ZBRFModules

©2010DigiInternational,Inc. 136

Sleep Commands

Execution Commands

Where most AT commands set or query register values, execution commands cause an action to

be executed on the module. Execution commands are executed immediately and do not require

changes to be applied.

SleepCommands

AT

Command

Name and Description

Node

Type

Parameter Range Default

Sleep Mode Sets the sleep mode on the RF module. An XBee loaded with router

firmware can be configured as either a router (SM set to 0) or an end device (SM > 0).

Changing a device from a router to an end device (or vice versa) forces the device to

leave the network and attempt to join as the new device type when changes are applied.

0-Sleep disabled (router)

1-Pin sleep enabled

4-Cyclic sleep enabled

5 - Cyclic sleep, pin wake

0 - Router

4 - End

Device

Number of Sleep Periods. Sets the number of sleep periods to not assert the On/Sleep

pin on wakeup if no RF data is waiting for the end device. This command allows a host

application to sleep for an extended time if no RF data is present

CRE 1 - 0xFFFF 1

Sleep Period. This value determines how long the end device will sleep at a time, up to

28 seconds. (The sleep time can effectively be extended past 28 seconds using the SN

command.) On the parent, this value determines how long the parent will buffer a

message for the sleeping end device. It should be set at least equal to the longest SP

time of any child end device.

CRE

0x20 - 0xAF0 x 10ms

(Quarter second

resolution)

0x20

Time Before Sleep Sets the time before sleep timer on an end device.The timer is reset

each time serial or RF data is received. Once the timer expires, an end device may enter

low power operation. Applicable for cyclic sleep end devices only.

E 1 - 0xFFFE (x 1ms)

0x1388 (5

seconds)

Command

Sleep Options. Configure options for sleep. Unused option bits should be set to 0.

Sleep options include:

0x02 - Always wake for ST time

0x04 - Sleep entire SN * SP time

Sleep options should not be used for most applications. See chapter 6 for more

information.

E0 - 0xFF 0

Wake Host. Set/Read the wake host timer value. If the wake host timer is set to a non-

zero value, this timer specifies a time (in millisecond units) that the device should allow

after waking from sleep before sending data out the UART or transmitting an IO sample.

If serial characters are received, the WH timer is stopped immediately.

E 0 - 0xFFFF (x 1ms)

Sleep Immediately. See Execution Commands table below..

Polling Rate. Sets the polling rate for the end device. E 0 - 0x1770 (10msec)

0x00 (100

msec)

ExecutionCommands

AT

Command

Name and Description

Node Type

Parameter Range Default

Apply Changes. Applies changes to all command registers causing queued command

command will not change the UART interface rate until changes are applied with the AC

command. The CN command and 0x08 API command frame also apply changes.

CRE -

Write. Write parameter values to non-volatile memory so that parameter modifications

persist through subsequent resets.

Note: Once WR is issued, no additional characters should be sent to the module until

after the "OK\r" response is received. The WR command should be used sparingly. The

EM250 supports a limited number of write cycles.“

CRE -- --

RE Restore Defaults. Restore module parameters to factory defaults. CRE -- --

Software Reset. Reset module. Responds immediately with an OK status, and then

performs a software reset about 2 seconds later.

CRE -- --

Network Reset. Reset network layer parameters on one or more modules within a PAN.

Responds immediately with an “OK” then causes a network restart. All network

configuration and routing information is consequently lost.

If NR = 0: Resets network layer parameters on the node issuing the command.

If NR = 1: Sends broadcast transmission to reset network layer parameters on all nodes

in the PAN.

CRE

0 - 1 --

Sleep Immediately. Cause a cyclic sleep module to sleep immediately rather than wait

for the ST timer to expire.

E- -

Commissioning Pushbutton. This command can be used to simulate commissioning

button presses in software. The parameter value should be set to the number of button

presses to be simulated. For example, sending the ATCB1 command will execute the

action associated with 1 commissioning button press.

CRE

1 2 3 4 5 6 7 8 9 10

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