Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 90 15.01.2010
Reference
GSM 07.07 [13]
Note
z Minimum functionality mode（AT+CFUN=0）and RF disabled
functionality mode (AT+CFUN=4) cannot be switched to each other.
z The <fun> power level will be written to flash except minimum
functionality.
z AT+CFUN=1,1 can be used to reset module purposely. Response
string “OK” will be returned after module resets if baud rate is set to
fixed baud rate.
3.2.48 AT+CCLK Clock
AT+CCLK Clock
Response
OK
Test Command
AT+CCLK=?
Parameters
Response
+CCLK: <time>
OK
+CME ERROR: <err>
Read Command
AT+CCLK?
Parameter
See Write Command
Response
OK
+CME ERROR: <err>
Write Command
AT+CCLK=<tim
e>
Parameter
<time> string type(string should be included in quotation marks)
value; format is "yy/MM/dd,hh:mm:ss±zz", where
characters indicate year (two last digits),month, day, hour,
minutes, seconds and time zone (indicates the difference,
expressed in quarters of an hour, between the local time
and GMT; range -47...+48). E.g. 6th of May 1994,
22:10:00 GMT+2 hours equals to "94/05/06,22:10:00+08"
Reference
GSM 07.07 [13]
Note
3.2.49 AT+CSIM Generic SIM Access
AT+CSIM Generic SIM Access
Test Command
AT+CSIM=?
Response
OK