Manual Documentation Number: ZPXXx-XXXXx-MR-0812
47
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 –
www.bb-elec.com
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 –
www.bb-europe.com
SM (Sleep Mode) Command
<Sleep Mode (Low Power)>
Set/Read Sleep Mode
Settings. By default, Sleep
Mode is disabled and the
module remains continually
active.
SM Command allows the
module to run in a lower-power
state and to be configured in
one of eight settings.
Cyclic Sleep settings wake the
module after the amount of
time designated by SM
Command. If the module
detects a wake-up initializer
during the time it is awake, it
will synchronize with the
transmitter and start receiving
data after the wake-up
initializer runs its duration.
Otherwise, it returns to Sleep
Mode and continues to cycle in
and out of inactivity until the
Wake-up Initializer is detected.
If a Cyclic Sleep setting is
chosen, the ST, LH and HT
parameters must also be set
as described in the “Sleep
Mode” section of this
manual.
ST (Time before Sleep)
Command
<Sleep Mode (Low Power)>
Set/Read the period of time in
which the module remains
inactive before entering into
Sleep Mode. For example: If
the ST parameter is set to
0x64 (100 decimal), the
module will enter into Sleep
mode after 10 seconds of
inactivity (no transmitting or
receiving). This command can only be used if Cyclic Sleep or Serial Port Sleep Mode
settings have been selected using the SM command.
AT Command: ATSM
Binary Command: 0x01
Parameter Range: 0
– 8
Parameter
Configuration
0
Disabled
1
Pin Sleep
2
Serial Port Sleep
3
Cyclic 0.5 second sleep
(Module wakesevery 0.5
seconds)
4
Cyclic 1.0 second sleep
5
Cyclic 2.0 second sleep
6
Cyclic 4.0 second sleep
7
Cyclic 8.0 second sleep
8
Cyclic 16.0 second sleep
Default Parameter Value: 0
Number of bytes returned: 1
Related Commands:
Pin Sleep
– PC (Power-up Mode), PW (Pin Wake-
up)
Serial Port Sleep
– ST (Time before Sleep)
Cyclic Sleep
– ST (Time before Sleep), LH (Wake-
up Initializer Timer), HT (Time Before Wake-up
Initializer), PW (Pin Wake-up)
AT Command: ATST
Binary Command: 0x02
Parameter
Range:
0x10
– 0xFFFF [x 100
milliseconds]
Default Parameter Value: 0x64 (100 decimal)
Number of bytes returned: 2
Related Commands: SM (Sleep Mode), LH
(Wake-up Initializer Timer), HT (Time before
Wake-up Initializer)