Rhydo SIM 900 SIM 900 -TTL UART User Manual

[Page 1] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 1 Document : D a t a s h ee t Model # : G S M – 1936 Date : 10 - DEC -2011 ...

[Page 2] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 2 GSM/GPRS TTL -Modem from rhydoLABZ is built with SIMCOM Make SIM900 Quad-band GSM/GPRS engine, works on frequencies 850 MHz, 900 MHz, 1800 MHz ...

[Page 3] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 3  Java (cooperate with Iasolution)  Embedded AT Specifications for Voice  Tricodec o Half rate (HR) o Full rate (FR) o Enhanced Full rate (EFR) �...

[Page 4] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 4 DIMENSIONS ...

[Page 5] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 5 PIN DESCRIPTIONS PIN PIN NAME DIR DETAILS VIN Power Supply PWR Power Supply Input (4.2-13V DC,1A) GND Ground PWR Groun...

[Page 6] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 6 OPERATING MODES The table below briefly summarizes the various operating modes referred to in ...

[Page 7] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 7 1.1 Turn on GSM Modem Using the PWRKEY Pin (Power on) You can turn on the Modem by driving the PWRKEY to a low level voltage for a short time (2-3 sec) and then releas...

[Page 8] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 8 After this moment, the AT commands can’t be executed. The modem enters the POWER DOWN mode. POWER DOWN can also be indicated by STATUS pin, which is a low level volt...

[Page 9] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 9 After GSM MODEM has been set by “AT+CFUN=0” or “AT+CFUN=4”, it can return to full functionality by “AT+CFUN=1”. For detailed information about “AT+CFUN...

[Page 10] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 10 2.0 Serial Interfaces The GSM module is designed as a DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection. Th...

[Page 11] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 11 Example: With Local Echo enabled: Transmit: AT\r Receive: AT\r\r\nOK\r\n SETTINGS FOR EASY MICROCONTROLLER COMMUNICATION When communicating with the GSM Modem usin...

[Page 12] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 12 AT+CSCS=”GSM”\r Returns OK or ERROR AT+CSCA=”+13123149810” \r Returns OK or ERROR. This number +13123149810 is the short message center for AT&T/Cingula...

[Page 13] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 13 AT+CMGL=”REC UNREAD” Read all received unread messages Debug port • Null modem port • Only contain Data lines TXD and RXD • Debug Port used for deb...

[Page 14] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 14 2.2 Audio Interfacing Pin Name Pin Number Function AIN/AOUT MIC 1 Microphone input + GND 2 Common ground SPK 3 Au...

[Page 15] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 15 INTERFACING THE GSM MODEM  Interfacing the Modem to microcontroller (Basic connection) ...

[Page 16] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 16  Interfacing the Modem to ARDUINO  Interfacing the Modem to PC via MAX232 Voltage level converter ...

[Page 17] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 17 GETTING STARTED 1) Insert SIM card Open the SIM cardholder by sliding it as per the arrow mark and lift up. Insert the SIM card , so as to align the chamfere...

[Page 18] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 18 Testing with a PC 1. Connect the GSM Modem to a PC Com port using a MAX-232 level conversion circuit or TTL- RS- 232/TTL-USB convertor and Power it Up. 2. Crea...

[Page 19] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 19 S SS SA AA AM MM MP PP PL LL LE EE E C CC CO OO OD DD DE EE E – –– – FOR FORFOR FOR I II IN NN NT TT TE EE ERFA RFARFA RFAC CC CI II IN NN...

[Page 20] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 20 P PP PC CC C I II IN NN NT TT TE EE ER RR RFA FAFA FAC CC CE EE E S SS SOF OFOF OFT TT TW WW WARE AREARE ARE FOR FORFOR FOR G GG GS SS SM MM...

[Page 21] Rhydo SIM 900 SIM 900 -TTL UART

www.rhydolabz.com SIM900 GSM/GPRS TTL UART Modem - User Manual Page 21 TECHNICAL SUPPORT If you are experiencing a problem that is not described in this manual, please contact ...