Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 198 23.06.2010
Delete an SMS message. AT+CMGD=1 OK
List all SMS messages to show message
has been deleted.
AT+CMGL="ALL" +CMGL: 2, "REC READ",
"[phone]
089","","02/01/30,20:45:12+
00"
Test again
OK
Send SMS using Chinese characters AT+CSMP=17,0,2,
25
AT+CSCS="UCS2"
AT+CMGS="0031003
300390031003800310
038003x003x003x003
x "
>4E014E50<Ctrl+Z>
OK
OK
+CMGS:36
OK
10.8 GPRS Commands
Demonstration Syntax Expect Result
To establish a GPRS context. Setup modem driver
Setup dial up
connection with *99#
Run internet explorer
Should be able to surf the
web using Internet explorer.
There are two GPRS Service Codes for
the ATD Command: Value 88 and 99.
Establish a connection by service code
99.
Establish a connection by service code
99 and using CID 1
ATD*99#
ATD*99***1#
CONNECT
CONNECT
To check if the MS is connected to the
GPRS network
Detach from the GPRS network
To check if the MS is connected to the
GPRS network
AT+ CG ATT?
AT+CGATT=0
AT+ CG ATT?
+CGATT:1
OK
OK
+CGATT : 0
OK
To check the class of the MS AT+ CG CL A SS ? +CGCLASS:B