Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 131 15.01.2010
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
z 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: (<mode>s)
OK
Test Command
AT+CEXTBUT=
?
Parameter
See Write Command
Response
+CEXTBUT: <mode>,<headset button press>
OK
Read Command
AT+CEXTBUT?
Parameters
See Write Command
Response
OK
ERROR
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CEXTBUT=
<mode>
Unsolicited result code
+CEXTBUT: <mode>,<headset button press>