User Manual

SARA-R4 series-AT commands manual
UBX-17003787 - R16

15Power management
Page 182 of 401
• the requested extended periodic TAU value in E-UTRAN
• the requested Active Time value
SARA-R4 / SARA-N4
Do not use a PIN enabled SIM card, otherwise the module does not enter the PSM.
The read command returns the requested values:
• If the power saving mode is enabled (+CPSMS: 1) and granted by the network, after the expiry of T3324
(assigned Active Time), every SW and HW component on the device will power down except for the real time
clock (RTC). It will stay powered down until the expiry of the assigned extended periodic TAU value (T3412_
ext), if present, or assigned periodic TAU value (T3412) (if the former is not present) or the power on line
is toggled.
• If the power saving mode is disabled (+CPSMS: 0) or not granted by the network, the device will not enter
Power Save Mode (PSM).
Retrieve the Active Time value and the extended periodic TAU value that are assigned to the UE by the network
by means of the AT+CEREG=4 command.
SARA-R4 / SARA-N4
If the power saving mode is enabled (+CPSMS: 1) and not granted by the network (+UCPSMS: 0), the device
will enter the non-network-coordinated PSM.
SARA-R404M / SARA-R410M-01B / SARA-N4
The URCs provided by the +CEREG AT commands for the Active Time value and the extended periodic
TAU value are not supported.
SARA-R410M / SARA-R412M / SARA-N4
See the +UCPSMS AT command to get the values assigned from the network.
SARA-R4 / SARA-N4
Deregister the module from the network to change the command setting. Issue AT+COPS=2 or AT
+CFUN=0 to deregister from network, issue the +CPSMS command and reboot the module (by means of
the AT+CFUN=15 command) in order to apply the +CPSMS settings.
SARA-R4
If the +CPSMS AT command has not been issued after selecting a MNO profile, the module applies the
default <Requested_Active_Time> and <Requested_Periodic_TAU> profile values (see Mobile Network
Operator profiles). If the set command is issued and any of the optional parameters is omitted, the module
applies the last set values.
15.2.2Syntax
Type Syntax Response Example
Set AT+CPSMS=[<mode>[,
<Requested_Periodic_RAU>[,
<Requested_GPRS_READY_timer>[,
<Requested_Periodic_TAU>,
[<Requested_Active_Time>]]]]]
OK AT+CPSMS=1,,,"01000011","010000
11"
OK
Read AT+CPSMS? +CPSMS: <mode>,[<Requested_
Periodic_RAU>],[<Requested_
GPRS_READY_timer>],
[<Requested_Periodic_TAU>],
[<Requested_Active_Time>]
OK
+CPSMS: 1,,,"01000011","01000011"
OK
Test AT+CPSMS=? +CPSMS: (list of supported
<mode>s),(list of supported
<Requested_Periodic_RAU>s),(list
of supported <Requested_GPRS_
READY_timer>s),(list of supported
<Requested_Periodic_TAU>s),(list
of supported <Requested_Active_
Time>s)
OK
+CPSMS: (0,1,2),,,("00000000"-
"11111111"),("00000000"-"11111111")
OK