Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 146 12/24/2010
Reference Note
Only be available in TEXT mode and AT+CSCS="GSM".
6.2.37AT+AUTEST Audio Channel Loopback Test
AT+AUTEST Audio Channel Loopback Test
Response
+AUTEST: (0-1),(0-1)
OK
Test Command
AT+AUTEST=?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+AUTEST=
<state>,<type>
Parameters
<state> 0 test is off
1 test is on
<type> 0 Normal audio channel
1 AUX audio channel
Reference Note
6.2.38AT+CCODE Configure SMS Code Mode
AT+CCODE Configure SMS Code Mode
Response
+CCODE: (0,1)
OK
Test Command
AT+CCODE=?
Parameter
See Write Command
Response
+CCODE:<mode>
OK
Read Command
AT+CCODE?
Parameter
See Write Command
Write Command
AT+CCODE=
<mode>
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>