Functions
INSYS GSM small 2.0
11.12.4.1
Change into Power-Down Mode
Configuration with HSComm
A configuration of this function using the HSComm software is not pos-
sible.
Configuration with AT commands
In order to enable power-down mode, use
the command
AT^SMSO
The INSYS GSM small 2.0 indicates at the
interface
^SMSO: MS OFF
OK
^SHUTDOWN
The command
AT^SMSO
has another function besides shutting down
the GSM engine. Some of the extended AT commands can only be
saved using this command (
AT^SCFG,
AT+CSNS,
AT^SCKS,
AT+CALA
).
Therefore, it is required to wait for the response
^SHUTDOWN
after en-
tering
AT^SMSO
, before disconnecting the power supply.
Because data is written into the non-volatile memory of the GSM engine
with each shutdown via
AT^SMSO
, the maximum number of shutdowns
is limited to 100,000.
11.12.4.2
Power-Down RTC-Alarm Mode
Since the internal real-time clock (
RTC
) continues to operate in power-down mode,
the alarm function of the RTC (
AT+CALA
) can be used to change the INSYS GSM
small 2.0 from power-down into RTC alarm mode.
If a configured RTC alarm occurs during the INSYS GSM small 2.0 is in power-
down mode, the RTC alarm mode is entered with the message:
^SYSSTART ALARM MODE
[+CALA: <text>]
If a text has been configured via additional parameters with the command
AT+CALA
,
this is indicated in the second line of the message.
If an alarm occurs, the alarm time configured with
AT+CALA
will be deleted and can
be configured again in RTC alarm mode.
Only a very limited operation is possible in this mode; the following AT commands
can be used:
AT+CCLK
(configuring time/date)
AT+CALA
(configuring alarm time)
AT^SMSO
(change into power-down mode)
11.12.4.3
Exiting the Power-Down Mode
Exiting the power-down mode is only possible by a reset via the reset input of the
INSYS GSM small 2.0 (refer to the sections Connections or Resetting the Device).
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