beautypg.com

At+cclk real time clock, 7 at+cclk real time clock – Siemens MC35 User Manual

Page 64

background image

AT Command Set

MC35_ATC_01_V03.02

Page 64 of 228

13.03.2002

4.7 AT+CCLK Real Time Clock

Test command

AT+CCLK=?

Response

OK

Read command

AT+CCLK?

Response

+CCLK:

Parameter:

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=

Response

OK/ERROR/+CME ERROR

Parameter:

see read command

Reference

GSM 07.07

Note

is retained if the device enters the Power Down mode via

AT^SMSO (pg. 185).

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

• See AT+CALA, pg. 55.

• 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 rec-
ommended to wait 1s before using the AT+CCLK command (for example
1s after ^SSYSTART has been output).