Siemens TC37 Module - AT+CCLK Real Time Clock

AT Command Set
TC3X_ATC_01_V04.00 Page 67 of 204 29.05.2002
4.7 AT+CCLK Real Time Clock
Test command
AT+CCLK=?
Response
OK
Read command
AT+CCLK?
Response
+CCLK: <time>
OK/ERROR/+CME ERROR
Parameter:
<time>: string type value; format is "yy/MM/dd,hh:mm:ss", where characters
indicate year (two last digits), month, day, hour, minutes, seconds;
e.g. 6
th
of May 2001, 22:10:00 hours equals to “01/05/06,22:10:00"
Write command
AT+CCLK=<time>
Response
OK/ERROR/+CME ERROR
Parameter:
<time> see read command
Reference
GSM 07.07
Note
· <time> is retained if the device enters the Power Down mode via
AT^SMSO (pg. 162).
· <time> is lost if power is totally disconnected and if no separate battery
back-up for the clock is provided via the ZIF cable. In this case, the clock
starts with <time> = “00/01/01,00:00:00” upon next power-up.
· See AT+CALA, pg. 58.
· When the GSM engine wakes up to Alarm mode, the system takes 1s to
re-initialize the RTC and to update the current time. Therefore, it is
recommended to wait 1s before using the AT+CCLK command (for
example 1s after ^SYSSTART has been output).