Hardware Related Commands - CalAmp 819-GPRS series User Manual

Hardware Related Commands

The AT Commands described in this section are related to the modems's hardware interface.
A brief description of hardware related commands are provided in Table 9.14. For futher information,
refer to the Siemens TC65/MC75 AT Command Set document available from Siemens.
Table 9.14: Hardware Related Commands
Command Description
Real Time Clock:
Format is "yy/mm/dd,hh:mm:ss", where the characters indicate the two last
digits of the year, followed by month, day, hour, minutes, seconds; for example
6th of July 2005, 22:10:00 hours equals to "05/07/06,22:10:00" Factory default
is "02/01/01,00:00:00"
Write command:
=<time>
AT+CCLK • <time> is retained if the device enters the Power Down mode via AT^SMSO.
• <time> will be reset to its factory default if power is totally disconnected. In
this case, the clock starts with <time>= "02/01/01,00:00:00" upon next power-
up.
• Each time TC65 is restarted it takes 2s to re-initialize the RTC and to update
the current time. Therefore, it is recommended to wait 2s before using the
commands AT+CCLK and AT+CALA (for example 2s after ^SYSSTART has been
output).
Set alarm time:
The write command can be used to set an alarm time in the ME or to clear a
AT+CALA programmed alarm. When the alarm time is reached and the alarm is executed
the ME returns an Unsolicited Result Code (URC) and the alarm time is reset to
"00/01/01,00:00:00".
Set critical operating temperature presentation mode or query temperature:
Use this command to monitor the temperature range of the module. The write
command enables or disables the presentation of URCs to report critical
temperature limits.
Write command:
=0 Presentation of URCs is disabled (except for <m> equal to -2 or +2).
AT^SCTM =1 Presentation of URCs is enabled.
Read command:
-2 Below lowest temperature limit (causes immediate switch-off)
-1 Below low temperature alert limit
0
1
2
Normal operating temperature
Above upper temperature alert limit
Above uppermost temperature limit (causes immediate switch-off)
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