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

Research SIM 900A Specifications

General

Compliant to GSM phase	2/2+
SMS	Text and PDU mode
SIM interface	3V/ 1.8V
Interface	RS232
Power Supply	5V-12V DC
Type	GSM Modem
Frequency Bands	900/1800 MHz
GPRS multi-slot class	10
GPRS mobile station class	B
Supply voltage range	5V - 12V
GPRS	Class 10
Transmitting power	Class 4 (2W) @ 850/900 MHz, Class 1 (1W) @ 1800/1900MHz

Summary

Overview of GSM GPRS SIM900A Modem

Modem Description and Capabilities

Introduces the GSM/GPRS Modem-RS232 with SIM900A, detailing its features and capabilities for communication.

GSM GPRS SIM900A Modem Features and Datasheets

Key Features

Lists key characteristics like dual-band, RS232 interface, MIC/Speaker support, and connectivity options.

Datasheet Links

Provides links to AT, FTP, and TCP/IP command datasheets for detailed technical information.

GSM GPRS Utility Software Usage

Software Functionality and Download

Details the GSM/GPRS Utility Software for testing, including download links and basic usage instructions.

Basic AT Commands for GSM and GPRS Testing

GSM AT Commands

Covers essential AT commands for checking the modem, managing SMS, and making voice calls.

GPRS AT Commands

Details AT commands for GPRS service, defining PDP contexts, and managing data states.

Module Setup and Initialization

SIM Card Insertion and Power Connection

Provides step-by-step instructions for inserting the SIM card and connecting the power adapter for basic operation.

SIM900A Modem Power Modes

Power Management Modes

Explains power down, minimum functionality, and sleep modes for controlling current consumption.

Wake up from Sleep Mode

Describes methods to wake the SIM900A module from its sleep state via DTR or network events.

GSM GPRS SIM900A Module Pinout and Layout

Pin Configuration and Component Identification

Details the pin configuration and component layout of the GSM GPRS SIM900A module for hardware integration.

Block Diagrams for Interfacing

Interfacing UNO and GSM Shield

Illustrates the connection diagram for interfacing the Arduino UNO with the GSM shield.

Interfacing Raspberry Pi and GSM Shield

Shows how to connect the Raspberry Pi board to the GSM shield for communication.

Interfacing BeagleBone and GSM Shield

Details the connection diagram for the BeagleBone board and the GSM shield.

Interfacing Microcontroller with GSM Shield

Explains the general interfacing of a microcontroller with the GSM shield.

Code Examples for Various Platforms

Platform-Specific Code Resources

Provides links to code examples for ARM, Atmel, PIC, Arduino, Raspberry Pi, Beaglebone, and MSP430.

Module Handling and Precautions

Handling Do's and Don'ts

Offers essential precautions and best practices for safely handling the GSM module, including ESD warnings.