Specifications

TC35i AT Command Set
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TC35i_ATC_V01.05 Page 80 of 278 04.08.2003
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 2003, 22:10:00 hours equals to “03/05/06,22:10:00"
Write command
AT+CCLK=<time>
Response
OK/ERROR/+CME ERROR
Parameter:
<time> see read command
Reference
GSM 07.07
Note
· Each time TC35i is restarted it takes 1s to re-initialize the RTC and to up-
date the current time. Therefore, it is recommended to wait 1s before using
the commands AT+CCLK or AT+CALA command (for example 1s after
^SYSSTART has been output).
· <time> is retained if the device enters the Power Down mode via
AT^SMSO (pg. 212).
· <time> will be reset to its default value if power is totally disconnected. In
this case, the clock starts with <time> = “02/01/01,00:00:00” upon next
power-up.
· See AT+CALA, pg. 71.