Specifications

Chapter 17 – Hardware-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 278
17.3 AT^SCTM Set Critical Operating Temperature
Presentation Mode or Query Temperature
Description: Use this command to monitor the temperature range of the module.
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
"Deferred Shutdown" at the end of this command for detail.
The write command enables/disables presentation of URCs to report critical temperature limits.
The read command returns:
• the URC presentation mode.
• information about the current temperature range of the module.
• The board temperature in Celsius if parameter <p>=1.
Select <n> to enable or disable the presentation of the URCs. Please note that the setting will not
be stored upon Power Down. 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.
Syntax: Test Command AT^SCTM=?
Response: ^SCTM:(list of supported <n>s)[, (range of <temp> in Celsius)]
OK
Read Command: AT^SCTM?
Response: ^SCTM: <n>, <m>[, <temp>]
OK
ERROR
+CME ERROR
Write Command: AT^SCTM=<n>
Response: OK
ERROR
+CME ERROR
Unsolicited Result Codes:
URC 2
^SCTM_B: <m>
for module (board) temperature
Parameters:
<n>
0 Presentation of URCs is disabled (except for <m> equal to -2 or +2). Default. This is the factory
default value and can be restored to '0' with AT&F. It is also a powerup default which is not
stored at power down.
1 Presentation of URCs is enabled.
<m>
-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)
<p>
0 Suppress output of <temp> in read command. This is the factory default value and can be
restored to '0' with AT&F. It is also a powerup default which is not stored at power down.
1 Output <temp> in test and read command.
<temp>
Board temperature in Celsius. Is comprised between the lowest temperature warning level and
the uppermost temperature warning level.