Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 89 23.06.2010
fixed baud rate.
3.2.47 AT+CCLK Clock
AT+CCLK Clock
Response
OK
Test Command
AT+CCLK=?
Parameter
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
3.2.48 AT+CSIM Generic SIM Access
AT+CSIM Generic SIM Access
Response
OK
Test Command
AT+CSIM=?
Parameters
Write Command
AT+CSIM=<leng
th>,<Command>
Response
+CSIM: < length >,< response >
OK