Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 131 23.06.2010
OK
Parameters
See Write Command
Response
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Unsolicited result code:
+CEXTHS: <mode>,<headset attach>
Write Command
AT+CEXTHS=<
mode>
Parameters
<mode> a numeric parameter which indicates whether an
unsolicited event code (indicating whether the
headset has been attached/detached) should be sent
to the terminal.
0 not send unsolicited event code
1 send unsolicited event code
<headset attach> a numeric parameter which indicates whether a
headset has been attached or not
0 not attached
1 attached
Reference Note
For this command, please refer to actual model.
6.2.13 AT+CEXTBUT Headset Button Status Reporting
AT+CEXTBUT Headset Button Status Reporting
Response
+CEXTBUT: (list of supported <mode>s)
OK
Test Command
AT+CEXTBUT=
?
Parameters
See Write Command
Response
+CEXTBUT: <mode>,<headset button press>
OK
Read Command
AT+CEXTBUT?
Parameters
See Write Command