Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 125 23.06.2010
gainlevel >
Parameters
< channel > 0 main audio handset channel
1 aux audio headset channel
2 main audio handfree channel
< gainlevel > int: 0 – 16
Reference Note
<gainlevel> value is related to channel specific.
6.2.2 AT+CPOWD Power Off
AT+CPOWD Power Off
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>,<pin2>,<puk1>,<puk2>
OK
Execution
Command
AT+SPIC
Parameters
<pin1>Times remain to input chv1
<pin2>Times remain to input chv2
<puk1>Times remain to input puk1
<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