Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 125 15.01.2010
Response Write Command
AT+CPOWD =
<n>
Parameter
<n> 0 Power off urgently ( Will not send out NORMAL POWER
DOWN)
1 Normal power off (Will send out NORMAL POWER
DOWN)
Reference Note
6.2.3 AT+SPIC Times Remain To Input SIM PIN/PUK
AT+SPIC Times Remain To Input SIM PIN/PUK
Response
Times remain to input SIM PIN
+SPIC: <pin1>,<puk1>,<pin2>,<puk2>
OK
Execution
Command
AT+SPIC
Parameters
<pin1>Times remain to input chv1
<puk1>Times remain to input puk1
<pin2>Times remain to input chv2
<puk2>Times remain to input puk2
Reference Note
6.2.4 AT+CMIC Change The Microphone Gain Level
AT+CMIC Change The Microphone Gain Level
Response :
+ CMIC: < gainlevel(Main_Mic) >, <gainlevel(Aux_Mic)>
OK
Read Command
AT+CMIC?
Parameters
See Write Command
Response
+CMIC: (list of supported <channel >s）, (list of supported < gainlevel
>s)
OK
Test Command
AT+CMIC=?
Parameters
See Write Command