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].
18.1
AT+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
Parameter Description
(str)
<time>
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
•
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>
<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
^SYSSTART has been output).
MC55_ATC_V04.00
Confidential / Released
PIN
ASC0 ASC1
!
%
%
AT+CCLK
Page 426 of 475
MUX1
MUX2
MUX3 Charge
%
%
%
%
and
(for example 2s after
AT+CALA
Last
%
!
3/17/06