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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

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

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).

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Siemens TC35 Terminal Especificaciones Pagina 67