GSM MODEM - Research Design Lab
Contents
1. 502019 CELCOM GSM Description ATTACH DETACH FROM GPRS SERVICE DEFINE PDP CONTEXT QUALITY OF SERVICE PROFILE MINIMUM ACCEPTABLE QUALITY OF SERVICE PROFILE REQUESTED PDP CONTEXT ACTIVATE OR DEACTIVATE ENTER DATA STATE SHOW PDP ADDRESS GPRS MOBILE STATION CLASS CONTROL UNSOLICITED GPRS EVENT REPORTING NETWORK REGISTRATION STATUS SELECT SERVICE FOR MO SMS MESSAGES GPRS PACKET COUNTERS www researchdesignlab com Page 6 fe d Research y Design Lab REV1 0 GSM GPRS SIM900A MODEM MODULE SETUP step 1 Insert SIMcard into the SIM slot jeg CH Ear tar N Jd en me e step 3 power ON automatically Place Jumper on JP3 of GSM shield www researchdesignlab com Page 7 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM step 4 Press and hold power button To turn on manually without jumper step 5 compile and burn the sample code given below to UNO board and then mount the GSM Shield SAMPLE CODE void setup d Serial begin 9600 delay 5000 void loop d Serial printIn AT delay 1000 Serial printIn AT CMGF 1 delay 1000 Serial printIn AT CMGS 1234567890 CHANGE TO DESTINATION NUMBER delay 1000 Serial print hi Serial write 26 delay 1000 Step 6 Padding configuration Short 3 and 2 by manual soldering to select hardware RX and TX DO and D1 Or Short 1 and 2 by manual soldering to select Software RX and TX D22. EXTERNAL SERIAL PINS SN MP G13482865205 MADIA NOVON ON l IMET 863306020461684 VADIA MURMUR ANT Power ON Wake Up MICROCONTROLLER MICROPROCESSOR JIN WdS INN TX www researchdesignlab com Page 13 X Research J Design Lab REV1 0 GSM GPRS SIM900A MODEM CODE GSM POWER SAVING PIC CODE http researchdesignlab com gsm power pic code html www researchdesignlab com Page 14 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM MODULE HANDLING DO S AND DONT S Avoid placing circuit boards Avoid holding IC when on a metal surface switched ON Hold edges while handling the If possible use anti static glovse circuit boards www researchdesignlab com Page 15
3. and D3 www researchdesignlab com Page 8 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM POWER MODES Power down mode SIM9OOA is set power down mode by AT CPOWD 0 There are two methods for the module to enter into low current consumption status Minimum Functionality Mode Minimum functionality mode reduces the functionality of the module to a minimum and thus minimizes the current consumption to the lowest level If SIM900A has been set to minimum functionality by AT CFUN 0 If SIM900A has been set to full functionality by AT CFUN 1 If SIM900A is set AT CFUN 4 to disable both the above functionality Sleep mode We can control SIM900A module to enter or exit the SLEEP mode in customer applications through DTR signal When DTR is in high level and there is no on air and hardware interrupt such as GPIO interrupt or data on serial port SIM900A will enter SLEEP mode automatically In this mode SIM9O0A can still receive paging or SMS from network but the serial port is not accessible Wake up SIM900A from sleep mode e Enable DTR pin to wake up SIM9O00A If DTR pin is pulled down to a low level e This signal will wake up SIM900A from power saving mode The serial port will be active after DTR changed to low level for about 50ms e Receiving a voice or data call from network to wake up SIM900A e Receiving a SMS from network to wake up SIM900A www researchdesignlab com Page 9 Research D
4. e TO RECEIVE SMS AT CMGD 1 J to delete the message in buffer AT CMGR 1 J to receive first message AT CMGR 1 to receive second message AT CMGR 2 and so on CMGL 1 REC READ 85291234567 07 05 01 08 00 154 32 145 37 lt MESSAGE e PREFERRED SMS MESSAGE STORAGE AT CPMS J CPMS SM C SM C SM OK AT CPMS d CPMS SM 19 30 SM 19 30 SM 19 30 e TO MAKE A VOICE CALL ATD9876543210 J e TO REDIAL LAST NO ATDL J e TO RECEIVE INCOMING CALL ATA J e TOHANGUP OR DISCONNECT A CALL ATH J e TO SET A PARTICULAR BAUDRATE AT IPR J To view the baud rate values AT IPR 0 J To set the modem to autobauding mode e OPERATOR SELECTION AT COPS J OK AT COPS J COPS 0 0 AirTel OK www researchdesignlab com Page 5 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM AT CRC SET CELLULAR RESULT CODES FOR INCOMING CALL INDICATION AT CRC J CRC 0 1 OK AT CRC d CRC 0 OK AT CRC 1 J OK CRING VOICE READ OPERATOR NAMES AT COPN J OK AT COPN J COPN COPN COPN COPN COPN COPN COPN COPN COPN GPRS Commands Command AT CGATT J AT CGDCONT J AT CGQMIN J AT CGQREQ J AT CGACT J AT CGDATA J AT CGPADDR 4 AT CGCLASS J AT CGEREP J AT CGREG 4d AT CGSMS J AT CGCOUNT J 472001 DHIMOBILE 60500 502012 maxis mobile 502013 TMTOUCH 502016 D1G1 502017 TIMECel
5. KA Research Design Lab REV1 0 GSM GPRS SIM900A MODEM GPRS GSM SIM900A MODEM WITH ARDUINO COMPATIBLE www researchdesignlab com Page 1 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM Contents REENEN 3 Pe a u ee O 4 NVA CAS COTS e E E E 4 Basic AT Commands for Testing nenne een reine 2 GSM AT Command ee ee 3 GPRS Onan EE 6 MODUL CB SETUP oarenien rre EE E A EE EEE E EEE se 7 SEIN EE TEE 8 POWER E Eet 9 EE 9 Minimum Functionality Mode 9 el Ee 9 Wake up SIM900A from sleep MO aa 9 PINS OF GPRS GSM SIM900A MODEM WITH ARDUINO COMPATIBLE 10 NARATION OF GPRS GSM SIM900A MODEM WITH ARDUINO COMPATIBLE 11 BLOCK Ee 12 INTERFACING UNO AND GSM SHIELD ra 12 INTERFACING MICROCONTROLLER WITH GSM SHIELD EXTERNAL SERIAL PINS EE 13 ODE a er rare 14 GSM POWERSAVING PIE CODE ee 14 MODUCE HANDLIN ende 15 DOSANDDONTS ee E E E E E E E 15 www researchdesignlab com Page 2 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM Overview GPRS GSM SIM900A MODEM WITH ARDUINO COMPATIBLE This is a very low cost and simple Arduino GSM and GPRS shield We use the module SIMCom SIM900A The Shield connects your Arduino to the internet using the GPRS wireless network Just plug this module onto your Arduino board plug in a SIM card from an operator offering GPRS coverage and follow a few simple instructions to start controlling your world through the internet You can also make receive voi
6. ce calls you will need an external speaker and microphone circuit and send receive SMS messages There are two modules 1 GSM SHIELD WITH STACKABLE UNO HEADERS ON BOTH SIDES WITH NOMIC AND SPEAKER 2 GSM SHIELD WITH SINGLE UNO HEADERS WITH MIC AND SPEAKER www researchdesignlab com Page 3 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM Features e Dual Band GSM GPRS 900 1800 MHz e R3S232 interface for direct communication with computer or MCU kit e Configurable baud rate e Power controlled using 29302WU IC e ESD Compliance e Enable with MIC and SPeaker socket e With slid in SIM card tray e With Stub antenna e Stackable UNO headers e optional power on through microcontroller e External serial pins Datasheets e AT Commands datasheet https drive google com a researchdesignlab com file d OBzrGD4zr88GnTkJwSli3dnhK bTg edit usp sharing e FTP Commands datasheet https drive google com a researchdesignlab com file d OBzrGD4zr88GnVkhacjUty 2tlU 2c edit usp sharing e TCP IP Commands datasheet https drive zoogle com a researchdesignlab com file d OBzrGD4zrs88GnUHRCOWwUjd WTVU edit usp sharing www researchdesignlab com Page 4 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM Basic AT Commands for Testing GSM AT Commands e TO CHECK THE MODEM ATJ OK e TO CHANGE SMS SENDING MODE AT CMGF 1 J OK e TOSEND NEW SMS AT CMGS MOBILE NO J lt MESSAGE CTRL Z
7. esign Lab REV1 0 GSM GPRS SIM900A MODEM PINS OF GPRS GSM SIM900A MODEM WITH ARDUINO COMPATIBLE Can select Hard UART or Soft UART based on jumper selection JP12 amp JP14 8ZE VOIWLVY ONN 194 SOIWNV researchdesignlab SCL SDA AREF ji GND D13 2 1040 20940 D12 SN MP 6 13482865295 D11 KULT nao IMEI 863306020461634 ITU D9 Power ON D8 Wake Up D7 D6 D5 D4 D3 D2 JIN Wids INI D1 TX DO RX OOTIVNV www researchdesignlab com Page 10 a fo Research Design Lab REV1 0 GSM GPRS SIM900A MODEM NARATION OF GPRS GSM SIM900A MODEM WITH ARDUINO COMPATIBLE RESET BUTTON Power ON Optional power ON through Controller switch Place Jumper on JP4 of GSM shield UNO HEADER STUB SNTENNA SERIAL PINS MIC SIM900A Module SPEAKER UNO HEADER www researchdesignlab com Page 11 Research Design Lab REV1 0 GSM GPRS SIM900A MODEM BLOCK DIAGRAMS INTERFACING UNO AND GSM SHIELD 8ZE VOIWLV ONN 104 SOIWNY Atmega 328 must be powered with DC 12v 2A JIN researchdesignlab SUVE s2 1840U 20940 SN HPG 13482965205 II ON OE O N N IMEI 863306020461684 ITT TO Yds JNN SCL SDA AREF GND D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 DO Power ON Wake Up www researchdesignlab com Page 12 oe Research Design Lab REV1 0 GSM GPRS SIM900A MODEM INTERFACING MICROCONTROLLER WITH GSM SHIELD
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