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 www.rhydolabz.com 

SIM900 GSM/GPRS TTL UART Modem - User Manual

 

 

 

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Page 1

 

 

Document  : 

Datasheet 

Model #   :  

GSM – 1936

 

Date                               : 

10-DEC-2011

 

 
 
 
 
 
 
 
 
 

    

    

    

    

    

    SIM 900 

SIM 900 

SIM 900 

SIM 900 ----TTL 

TTL 

TTL 

TTL     UART

UART

UART

UART    

GGGGSSSSM/G

M/G

M/G

M/GPPPPRS

RS

RS

RS    M

M

M

Mooooddddeeeem

m

m

m     

 

User Manual

 

 

 
 
 
 

 
 
 
 
 
 
 
 
Rhydo Technologies (P) Ltd. 

(An ISO 9001:2008 Certified R&D Company)

 

Golden Plaza, Chitoor Road, 
Cochin – 682018, Kerala State, India 

Phone 

: 0091- 484-2370444, 2371666 

Cell 

: 0091- 99466 70444 

 

 

 

 

 

Fax 

: 0091 - 484-2370579 

E-mail 

: 

[email protected]

, 

[email protected]

 

WebSite 

: http://www.rhydolabz.com 

 
                                                                                                                                                     

Содержание GSM-1936

Страница 1: ...TTL TTL UART UART UART UART G G G GS S S SM G M G M G M GP P P PRS RS RS RSM M M Mo o o od d d de e e em m m m User Manual Rhydo Technologies P Ltd An ISO 9001 2008 Certified R D Company Golden Plaza Chitoor Road Cochin 682018 Kerala State India Phone 0091 484 2370444 2371666 Cell 0091 99466 70444 Fax 0091 484 2370579 E mail info rhydolabz com sales rhydolabz com WebSite http www rhydolabz com ...

Страница 2: ...SMS connect to internet via GPRS through simple AT commands FEATURES High Quality Product Not hobby grade Quad Band GSM GPRS 850 900 1800 1900 MHz 3V3 or 5V interface for direct communication with MCU kit Configurable baud rate SMA connector with GSM L Type Antenna Built in SIM Card holder Built in Network Status LED Inbuilt Powerful TCP IP protocol stack for internet data transfer over GPRS Audio...

Страница 3: ...icodec o Half rate HR o Full rate FR o Enhanced Full rate EFR Hands free operation Echo suppression AMR o Half rate HR o Full rate FR Interfaces Analog audio interface Serial interface SMA Antenna Connector Seriel Port Pins RXD TXD at 2mm Pitch RMC Seriel Port Status and Controlling Pins at 2mm Pitch RMC DC Power pins at 2mm Pitch RMC Compatibility AT cellular command interface ...

Страница 4: ... TTL UART Modem User Manual W e b r i n g t h e w o r l d t o y o u Page 4 DIMENSIONS OPERATING CONDITIONS Parameter IN OUT Minimum Maximum Unit Supply Voltage VIN Input 4 2 13 V Current Consumption 40 590 mA V_Interface Input 2 5 6 V ...

Страница 5: ...t pin to reset the modem Pull down this pin to reset the modem using a open collector output or switch Normally leave open No on board level Conversion RTS Request to send IN Used For hardware flow control If needed can be shorted with CTS using J1 at bottom side in default left open With on board level Conversion CTS Clear to send OUT Used For hardware flow control If needed can be shorted with R...

Страница 6: ...GPRS STANDBY Modem is ready for GPRS data transfer but no data is currently sent or received In this case power consumption depends on network settings and GPRS configuration GPRS DATA There is GPRS data transfer PPP or TCP or UDP in progress In this case power consumption is related with network settings e g power controllevel uplink downlink data rates and GPRS configuration e g used multi slot ...

Страница 7: ...own procedure Turn off GSM Modem using AT command Over voltage or under voltage automatic shutdown Take effect if over voltage or under voltage is detected Over temperature or under temperature automatic shutdown Take effect if over temperature or under temperature is detected 1 2 1 Turn Off GSM Modem Using the PWRKEY Pin Power down You can turn off the GSM Modem by driving the PWRKEY to a low lev...

Страница 8: ... the PWRKEY pin Before restarting the GSM MODEM you need delay at least 500ms from detecting the STATUS low level on The restarting scenario illustrates as the following figure 1 5 Power Saving There are two methods for the GSM Modem to enter into low current consumption status AT CFUN is used to set GSM Modem into minimum functionality mode and DTR hardware interface signal can be used to lead sy...

Страница 9: ...s not accessible Note For GSM MODEM it requests to set AT command AT CSCLK 1 to enable the sleep mode the default value is 0 that can t make the GSM Modem enter sleep mode For more details please refer to our AT command list 1 8 Wake Up GSM MODEM from SLEEP Mode When GSM MODEM is in SLEEP mode the following methods can wake up the GSM Modem Enable DTR pin to wake up GSM MODEM If DTR pin is pulled ...

Страница 10: ...eiving the OK response DTE and DCE are correctly synchronized The more information please refer to the AT command AT IPR Restrictions on autobauding operation The serial port has to be operated at 8 data bits no parity and 1 stop bit factory setting The Unsolicited Result Codes like RDY CFUN 1 and CPIN READY are not indicated when you start up the ME while autobauding is enabled This is due to the...

Страница 11: ...r Enable short response ATE0 W r Disable Local Echo AT CIURC 0 W r Disable CALL READY Startup Message Now instead of commands returning OK or ERROR in plain text as well as repeating all written commands the GSM Modem will not echo what you transmit and the GSM Modem will return error codes in single bytes For example instead of Transmit AT r Receive r nOK r n You ll have Transmit AT r Receive r n...

Страница 12: ...rns OK or ERROR These numbers refer to settings for text message sending keep them this way AT CMGS AT CMGS 1234567890 r Returns prompting what message to send 1234567890 is the phone number that the text message will be sent to Hello this is a message Ctrl z Type any message then press Ctrl z Returns confirmation message and Message ID number 3 SEND A TEXT MESSAGE Goal Read a Text AT CMGF 1 r Ret...

Страница 13: ...e Upgrade and Software Debug The DBG_TXD DBG_RXD and GND must be connected to the IO connector when user need to upgrade software and debug software the DBG_TXD DBG_RXD should be used for software upgrade and for software debugging The TXD and RXD also should be connected to the IO connector if user wants to send AT command or data stream to GSM MODEM The PWRKEY pin is recommended to connect to th...

Страница 14: ...generated analog signals such as polyphonic tones from an external melody IC or music generated by an FM tuner IC or module You can use AT CMIC to adjust the input gain level of microphone use AT SIDET to set the side tone level In addition you can also use AT CLVL to adjust the output gain level For more details please refer to document It is suggested that you adopt one of the following two matc...

Страница 15: ...face with 5V microcontrollers like PIC AVR 8051 Derivatives Arduinos and 3V3 Microcontrollers like ARM ARM Cortex XX ect Make ensure V_INTERFACE pin is supplied with same voltage level as the microcontroller VCC As per the Fig 3 there is only 2 connections are required to use the modem Connect RX pin of the modem to the TX pin of the microcontroller and TX pin of the modem to microcontroller s RX ...

Страница 16: ...ww rhydolabz com SIM900 GSM GPRS TTL UART Modem User Manual W e b r i n g t h e w o r l d t o y o u Page 16 Interfacing the Modem to ARDUINO Interfacing the Modem to PC via MAX232 Voltage level converter ...

Страница 17: ...arching For Network and becomes slow blinking once the Modem registers with the Network 6 Network LED The Network LED indicates the various status of GSM module eg Power on Network registration GPRS connectivity When the modem is powered up the status LED will blink every second After the Modem registers in the network takes between 10 60 seconds LED will blink in step of 3 seconds At this stage y...

Страница 18: ...232 level conversion circuit or TTL RS 232 TTL USB convertor and Power it Up 2 Create a HyperTerminal Windows tool for serial port communications window with Baudrate 9600 and connect it to the ComPort to which GSM is connected 3 Type any AT command in the HyperTerminal window and you could see the modem responding by sending OK Terminal Window on PC where GSM Modem is connected ...

Страница 19: ... void main SerialPortInit Serial Communication 9600 N 8 1 Send2Gsm AT r n Transmit AT to the module GSM Modem sends OK DelayS 2 2 sec delay Send2Gsm ATE0 r n Echo Off DelayS 2 2 sec delay Send2Gsm AT CMGF 1 r n Switch to text mode DelayS 2 2 sec delay Send2Gsm AT CMGS 919447367176 r n Send SMS to a cell number DelayS 2 2 sec delay Send2Gsm TEST DATA FROM RhydoLABZ COCHIN Input SMS Data SerialTx 0x...

Страница 20: ...StartMenu Programs Rhydolabz GSM Modem Connect the GSM Modem to a PC Com port using a MAX 232 circuit or TTL RS 232 TTL USB and Power it Up Select the Comport in the application software to which GSM modem is connected and Press the Connect button Click on the button Test Modem Communication If the connection is OK the software displays GSM Modem OK If you want to send an SMS to another mobile usi...

Страница 21: ...he understanding that any outcome whatsoever is at the users own risk All products are tested for their best performance before shipping still rhydoLABZ is offering One year Free service warranty Components cost Shipping cost will be charged from Customer DISCLAIMER Copyright Rhydo Technologies P Ltd All rights are reserved Reproduction in whole or in part is prohibited without the prior written c...

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