The read command reads the current Power Saving Mode (PSM)
settings.
Response syntax:
+CPSMS: <mode>,[<Requested_Periodic-RAU>],[<Requested_GPRS-READY-timer>],[<Requested_Periodic-TAU-ext>],[<Requested_Active-Time>]
The read command parameters and their defined values are the following:
- <mode>
- 0 – Disable power saving mode
- 1 – Enable power saving mode
- <Requested_Periodic-RAU>
- Ignored
- <Requested_GPRS-READY-timer>
- Ignored
- <Requested_Periodic-TAU-ext>
- String. 1 byte in 8-bit format.
- Indicates the extended periodic TAU value (T3412_EXT extended value) allocated to the
device in E-UTRAN. For the coding and value range, see the GPRS Timer 3 IE in 3GPP
TS 24.008 Table 10.5.163a/3GPP TS 24.008.
- GPRS Timer 3 value (octet 3).
- Bits 5 to 1 represent the binary coded timer value.
- Bits 8 to 6 define the timer value unit for the General Packet Radio Services (GPRS)
timer as follows:
- Bits
- 8 7 6
- 0 0 0 – Value is incremented in multiples of 10 minutes
- 0 0 1 – Value is incremented in multiples of 1 hour
- 0 1 0 – Value is incremented in multiples of 10 hours
- 0 1 1 – Value is incremented in multiples of 2 seconds
- 1 0 0 – Value is incremented in multiples of 30 seconds
- 1 0 1 – Value is incremented in multiples of 1 minute
- 1 1 0 – Value is incremented in multiples of 320 hours
Note: Interpreted as 1 hour if the request sent to network is not integrity protected.
After registration, check the value given by the network (see
+CEREG). If 1 hour unit is given,
disable and enable PSM using commands
+CPSMS=0 and
+CPSMS=1.
- 1 1 1 – Value indicates that the timer is deactivated
- <Requested_Active-Time>
- String. 1 byte in 8-bit format.
- Optional. Timer value updated if present. If not present, the value of the requested
Active-Time is set to the manufacturer-specific default. For the coding and value range,
see the GPRS Timer 2 IE in 3GPP TS 24.008 Table 10.5.163/3GPP TS
24.008.
- GPRS Timer 2 value (octet 3).
- Bits 5 to 1 represent the binary coded timer value.
- Bits 8 to 6 define the timer value unit for the GPRS timer as follows:
- Bits
- 8 7 6
- 0 0 0 – Value is incremented in multiples of 2 seconds
- 0 0 1 – Value is incremented in multiples of 1 minute
- 0 1 0 – Value is incremented in multiples of 6 minutes
- 1 1 1 – Value indicates that the timer is deactivated
The following command example reads the current power saving mode settings:
AT+CPSMS?
+CPSMS: 1,,,"10101111","01101100"
OK