Research SIM 900A User manual

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GSM GPRS SIM900A MODEM
REV1.0
GSM GPRS SIM 900A module with Stub
Antenna and SMA connector-USB
USER MANUAL

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GSM GPRS SIM900A MODEM
REV1.0
Contents
Overview......................................................................................................................................... 4
GSM GPRS SIM900A Modem .................................................Error! Bookmark not defined.
Features........................................................................................................................................... 5
Datasheets ....................................................................................................................................... 5
GSM Utility Software..................................................................................................................... 6
Basic AT Commands for Testing ................................................................................................... 7
GSM AT Commands:................................................................Error! Bookmark not defined.
GPRS Commands:.....................................................................Error! Bookmark not defined.
MODULE SETUP .......................................................................................................................... 9
POWER MODES.......................................................................................................................... 12
Power down mode..................................................................................................................... 12
Minimum Functionality Mode.................................................................................................. 12
Sleep mode................................................................................................................................ 12
Wake up SIM900A from sleep mode ....................................................................................... 12
PINS OF GSM SIM900A Modem................................................................................................ 13
NARATION OF GSM SIM900A MODEM................................................................................. 14
BLOCK DIAGRAMS................................................................................................................... 15
INTERFACING UNO AND GSM SHIELD............................................................................ 15
INTERFACING RASPBERRY AND GSM SHIELD............................................................. 16
INTERFACING BEAGLEBOARD AND GSM SHIELD ...................................................... 17
INTERFACING MICROCONTROLLER WITH GSM SHIELD........................................... 18
CODES ......................................................................................................................................... 19
ARM CODE.............................................................................................................................. 19
ATMEL CODE......................................................................................................................... 19
PIC CODE ................................................................................................................................ 19
ARDUNIO CODE .................................................................................................................... 19
RASPBERRY PI CODE........................................................................................................... 19
BEAGLEBONE CODE............................................................................................................ 19
MSP430 CODE......................................................................................................................... 19

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GSM GPRS SIM900A MODEM
REV1.0
GSM POWER SAVING ATMEL CODE................................................................................ 19
GSM POWER SAVING PIC CODE........................................................................................ 19
MODULE HANDLING ............................................................................................................... 20
DO'S AND DONT'S................................................................................................................. 20

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GSM GPRS SIM900A MODEM
REV1.0
Overview
GSM GPRS SIM 900A module with Stub Antenna and SMA connector-USB
GSM/GPRS Modem-RS232 is built with Dual Band GSM/GPRS engine- SIM900A,
works on frequencies 900/ 1800 MHz. The Modem is coming with RS232 interface, which
allows you connect PC as well as microcontroller with RS232 Chip(MAX232). The baud rate is
configurable from 9600-115200 through AT command. The GSM/GPRS Modem is having
internal TCP/IP stack to enable you to connect with internet via GPRS. It is suitable for SMS,
Voice as well as DATA transfer application in M2M interface. The onboard Regulated Power
supply allows you to connect wide range unregulated power supply . Using this modem, you can
make audio calls, SMS, Read SMS, attend the incoming calls and internet through simple AT
commands

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GSM GPRS SIM900A MODEM
REV1.0
Features
Dual-Band GSM/GPRS 900/ 1800 MHz.
RS232 interface for direct communication with computer or MCU kit.
Configurable baud rate.
Power controlled using 29302WU IC.
ESD Compliance.
Enable with MIC and SPeaker socket.
With slid in SIM card tray.
With Stub antenna and SMA connector.
Input Voltage: 12V DC.
Jumper settings to choose between USB mini and rs232
Datasheets
AT Commands datasheet
https://drive.google.com/a/researchdesignlab.com/file/d/0BzrGD4zr88GnTkJwSll3dnhK
bTg/edit?usp=sharing
FTP Commands datasheet
https://drive.google.com/a/researchdesignlab.com/file/d/0BzrGD4zr88GnVkhacjUtY2tIU
2c/edit?usp=sharing
TCP/IP Commands datasheet
https://drive.google.com/a/researchdesignlab.com/file/d/0BzrGD4zr88GnUHRCQlJwUjd
WTVU/edit?usp=sharing

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GSM GPRS SIM900A MODEM
REV1.0
GSM Utility Software
Bulk Message sending
AT command testing terminal
Provides step by step GPRS setup
To download GSM/GPRS Utility software ,click on the link below
https://docs.google.com/file/d/0BzrGD4zr88GnYll6dlFJT2NFY2s/edit
http://www.4shared.com/file/rwyHmtGOba/GSM_GPRS_utility.html

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GSM GPRS SIM900A MODEM
REV1.0
Basic AT Commands for Testing
GSM AT Commands:
TO CHECK THE MODEM:
AT ↲
OK
TO CHANGE SMS SENDING MODE:
AT+CMGF=1 ↲
OK
TO SEND NEW SMS:
AT+CMGS=”MOBILE NO.” ↲
<MESSAGE
{CTRL+Z}
TO RECEIVE SMS
AT+CMGD=1 ↲{to delete the message in buffer}
AT+CMGR=1 ↲{to receive first message AT+CMGR=1}
{to receive second message AT+CMGR=2 and so on}
+CMGL: 1,"REC READ","[phone]",,"07/05/01,08:00:15+32",145,37
<MESSAGE
PREFERRED SMS MESSAGE STORAGE:
AT+CPMS=? ↲
+CPMS: (“SM”),(“SM”),(“SM”)
OK
AT+CPMS? ↲
+CPMS: “SM”,19,30,”SM”,19,30,”SM”,19,30
TO MAKE A VOICE CALL:
ATD9876543210; ↲
TO REDIAL LAST NO:
ATDL ↲
TO RECEIVE INCOMING CALL:
ATA ↲
TO HANGUP OR DISCONNECT A CALL:
ATH ↲
TO SET A PARTICULAR BAUDRATE:
AT+IPR=? ↲{To view the baud rate values}
AT+IPR=0 ↲{To set the modem to autobauding mode}
OPERATOR SELECTION:
AT+COPS=? ↲
OK
AT+COPS? ↲
+COPS: 0,0,”AirTel”
OK

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GSM GPRS SIM900A MODEM
REV1.0
AT+CRC SET CELLULAR RESULT CODES FOR INCOMING CALL INDICATION:
AT+CRC=? ↲
+CRC: (0-1)
OK
AT+CRC? ↲
+CRC: 0
OK
AT+CRC=1 ↲
OK
+CRING: VOICE
READ OPERATOR NAMES.
AT+COPN=? ↲
OK
AT+COPN ↲
+COPN: “472001″,”DHIMOBILE”
+COPN: “60500
+COPN: “502012″,”maxis mobile”
+COPN:
+COPN: “502013″,”TMTOUCH”
+COPN
+COPN: “502016″,”DiGi”
+COPN: “502017″,”TIMECel”"
+COPN: “502019″,”CELCOM GSM”
GPRS Commands:
Command Description
AT+CGATT ↲ATTACH/DETACH FROM GPRS SERVICE
AT+CGDCONT ↲DEFINE PDP CONTEXT
AT+CGQMIN ↲QUALITY OF SERVICE PROFILE (MINIMUM ACCEPTABLE)
AT+CGQREQ ↲QUALITY OF SERVICE PROFILE (REQUESTED)
AT+CGACT ↲PDP CONTEXT ACTIVATE OR DEACTIVATE
AT+CGDATA ↲ENTER DATA STATE
AT+CGPADDR ↲SHOW PDP ADDRESS
AT+CGCLASS ↲GPRS MOBILE STATION CLASS
AT+CGEREP ↲CONTROL UNSOLICITED GPRS EVENT REPORTING
AT+CGREG ↲NETWORK REGISTRATION STATUS
AT+CGSMS ↲SELECT SERVICE FOR MO SMS MESSAGES
AT+CGCOUNT ↲GPRS PACKET COUNTERS

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GSM GPRS SIM900A MODEM
REV1.0
MODULE SETUP
step 1 : Insert SIMcard into the SIM slot.
step 2 : Plug in 12V -2A DC power adapter, power led is lit (place jumper between PWRkey
and on pin for only to turn ON automatically).

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GSM GPRS SIM900A MODEM
REV1.0
step 3 : Press and hold power button (To turn on manually without jumper)
step 5 : jumper setting for selecting mini USB or RS232
step 4 : Connect to PC through RS232 cable or miniUSB to USB cable