Specifications
SIM900 AT Command Manual       
SIM900_AT Command Manual_V1.03  124  12/24/2010 
6.2.5 AT+CALA Set Alarm Time 
AT+CALA Set Alarm Time 
Response: 
+CALA: ("yy/mm/dd,hh:mm:ss","hh:mm:ss"),(1-5),(0-7) 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Test Command 
AT+CALA=? 
Parameters 
See Write Command 
Response: 
+CALA: <time>,<n1>,[<recurr>] 
(<CR><LF> +CALA: <time>,<n2>,[<recurr>] …)  
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Read 
Command 
AT+CALA? 
Parameters 
See Write Command 
Response 
OK 
If error is related to ME functionality: 
+CME ERROR: <err> 
Write 
Command 
AT+CALA= 
<time>,<n>,[<
recurr>] 
Parameters 
<time> a string parameter(string should be included in quotation marks) 
which indicates the time when alarm arrives. The format is 
"yy/MM/dd,hh:mm:ss" where characters indicate the last two digits 
of year, month, day, hour, minute, second and time zone. The time 
zone is expressed in quarters of an hour between the local time and 
GMT, ranging from -48 to +48. 
<n> index of the alarm (range 1 to 5 for now). 
<
recurr> "0", "1"---"7" string type value indicating day of week for the 
alarm in one of the following formats: 
"<1..7>[,<1..7>[…]]" – Set a recurrent alarm for one or more days 
in the week. The digits 1 to 7 correspond to the days in the week, 
Monday (1), …, Sunday (7). 
Example: The string "1,2,3,4,5" may be used to set an alarm for 
all weekdays. 
"0" – Set a recurrent alarm for all days in the week 
Reference  Note 










