Data Sheet

SIM900 AT Commands Set
SIM900R01_ATC_V1.00 142 15.01.2010
Response
+CSDT: <mode>
OK
Read Command
AT+ CSDT?
Parameter
Response
+CSDT: (0-1)
OK
Test Command
AT+ CSDT =?
Parameter
See Write Command.
Response
OK
ERROR
Write Command
AT+CSDT=[<mo
de>]
Parameter
<mode>
0 – switch off detecting SIM card (default)
1 – switch on detecting SIM card
Reference Note
It is not supported temporarily.
6.2.28 AT+CMGDA Delete All SMS
AT+ CMGDA Delete All SMS
Response:
+CMGDA: (listed of supported <type>s)
OK
+CMS ERROR: <err>
Test Command
AT+CMGDA=?
Parameter
see Write Command
Write Command
AT+CMGDA=<t
ype>
Response:
OK
ERROR
+CMS ERROR: <err>