Siemens MC55 AT Hardware related Commands, 18.1 AT+CCLK Real Time Clock, At+Cclk=?, At+Cclk?

18.Hardware related Commands

The AT Commands described in this chapter are related to the MC55's hardware interface. More information regarding this interface is available with the "MC55 Hardware Interface Description"[2].

18.1AT+CCLK Real Time Clock

Syntax

Test Command

AT+CCLK=?

Response(s)

OK

Read Command

AT+CCLK?

Response(s)

+CCLK: <time>

OK

Write Command

AT+CCLK=<time>

Response(s)

+CME ERROR: <err>

ERROR OK

Reference(s)

GSM 07.07

PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last

! % % % % % % % !

Parameter Description

<time>(str)

Format is "yy/mm/dd,hh:mm:ss", where the characters indicate the two last digits of the year, followed by month, day, hour, minutes, seconds; for example 6th of July 2005, 22:10:00 hours equals to "05/07/06,22:10:00" Factory default is "02/01/01,00:00:00"

Notes

•<time> is retained if the device enters the Power Down mode via AT^SMSO.

•<time> will be reset to its factory default if power is totally disconnected. In this case, the clock starts with <time>= "02/01/01,00:00:00" upon next power-up.

•Each time MC55 is restarted it takes 2s to re-initialize the RTC and to update the current time. Therefore, it is recommended to wait 2s before using the commands AT+CCLK and AT+CALA (for example 2s after ^SYSSTART has been output).

MC55_ATC_V04.00	Page 426 of 475	3/17/06
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