> 19.5 | AT^SCTM Set critical operating temperature presentation mode or query temperature

> Use this command to monitor the temperature range of the module and the battery. The write command enables or disables the presentation of URCs to report critical temperature limits.
> CAUTION: During a guard period of two minutes after power-up, the module will not switch off, even if the critical temperature limit is exceeded. This allows the user to issue emergency calls before the module switches off.
> During this guard period, the module operates in an automatic report mode: URCs can be always displayed regardless of the selected mode <n>. Refer to Section 19.5.1, Deferred shutdown for detail.
> Syntax

> Test Command AT^SCTM=?
> Response(s)
> ^SCTM:(list of supported <n>s)
> OK

> Read Command AT^SCTM?
> Response(s)
> ^SCTM: <n>, <m>
> OK
> ERROR
> +CME ERROR

> Write Command AT^SCTM=<n>
> Response(s)
> OK
> ERROR
> +CME ERROR

> Reference(s) |  | PIN |  | ASC0 | ASC1 | USB | MUX1 | MUX2 | MUX3 |  |  | Charge | Q | Last
> SIEMENS |  | - |  | + | + | + | + | + | + |  |  | + | + | -

> Unsolicited Result Codes
> URC 1
> URCs will be automatically sent to the TA when the temperature reaches or exceeds the critical level, or when it is back to normal.
> ^SCTM_A: <m>
> for battery temperature
> URC 2
> ^SCTM_B: <m>
> for module (board) temperature
> Command Description
> The read command returns:

> • | the URC presentation mode

> • | information about the current temperature range of the module

> Please note that the Read command does not indicate the temperature range of the battery. The battery temperature can only be reported by an Unsolicited Result Code.
> Select <n> to enable or disable the presentation of the URCs. Please note that the setting will not be stored upon Power Down, i.e. after restart or reset, the default <n>=0 will be restored. To benefit from the URCs <n>=1 needs to be selected every time you reboot the GSM engine.
> Parameter Description

> <n>(num)

> 0(&F)(P)
> Presentation of URCs is disabled (except for <m> equal to -2 or +2).
> 1
> Presentation of URCs is enabled.

> <m>(num)

> -2
> Below lowest temperature limit (causes immediate switch-off)
> -1
> Below low temperature alert limit
> 0
> Normal operating temperature
> 1
> Above upper temperature alert limit
> 2
> Above uppermost temperature limit (causes immediate switch-off)
> Notes

> • | Please refer to the "Hardware Interface Description" for specifications on critical temperature ranges.

> • | To avoid damage the module will shut down once the critical temperature is exceeded. The procedure is equivalent to the power-down initiated with AT^SMSO.

> • | URCs indicating the alert level "1" or "-1" are intended to enable the user to take appropriate precautions, such as protect the module and the battery from exposure to extreme conditions, or save or back up data etc. The presentation of "1" or "-1" URCs depends on the settings selected with the write command: If <n>=0: Presentation is enabled during the two minute guard period after the module was switched on. After expiry of the two minute guard period, the presentation will be disabled, i.e. no URCs with alert levels "1" or ''-1" will be generated. If <n>= 1: Presentation of "1" or "-1" URCs is always enabled.

> • | Level "2" or "-2" URCs are followed by immediate shutdown, except in cases described in Section 19.5.1, Deferred shutdown. The presentation of these URCs is always enabled, i.e. they will be output even though the factory setting AT^SCTM=0 was never changed.

> Examples

> EXAMPLE 1 | URCs issued when the operating temperature is out of range:

> ^SCTM_A: 1 | Caution: Battery close to overtemperature limit.
> ^SCTM_A: 2 | Alert: Battery above overtemperature limit. Engine switches off.
> ^SCTM_B: 1 | Caution: Module close to overtemperature limit.
> ^SCTM_B: 2 | Alert: Module is above overtemperature limit and switches off.
> ^SCTM_A: -1 | Caution: Battery close to undertemperature limit.
> ^SCTM_A: -2 | Alert: Battery below undertemperature limit. Engine switches off.
> ^SCTM_B: -1 | Caution: Module close to undertemperature limit.
> ^SCTM_B: -2 | Alert: Module is below undertemperature limit and switches off.

> EXAMPLE 2 | URCs issued when the temperature is back to normal (URC is output once):

> ^SCTM_A: 0 | Battery temperature back to normal temperature.
> ^SCTM_B: 0 | Module back to normal temperature.