Compatible with Arduino GPRS/GSM Shield SIM900 Quad Band
Overview
The SIM900 GSM/GPRS Shield provides you a way to use the GSM cell phone network to receive data from a remote location. The shield allows you to achieve this via any of the three methods
Features
Based on SIMCom's SIM900 Module
Quad-Band 850 / 900/ 1800 / 1900 MHz - would work on GSM networks in all countries across the world.
Control via AT commands - Standard Commands: GSM 07.07 & 07.05 | Enhanced Commands: SIMCOM AT Commands.
Short Message Service - so that you can send small amounts of data over the network (ASCII or raw hexadecimal).
Embedded TCP/UDP stack - allows you to upload data to a web server.
Speaker and Headphone jacks - so that you can send DTMF signals or play recording like an answering machine.
SIM Card holder and GSM Antenna - present onboard.
12 GPIOs, 2 PWMs and an ADC (all 2.8 volt logic) - to argument your Arduino.