GSM-GPRS (CELLPHONE) COMMUNICATIONS:


IComSat v1.1 : SIM900 GSM/GPRS shield (Available HERE - Click)


Features
  • Quad-Band 850/ 900/ 1800/ 1900 MHz
  • GPRS multi-slot class 10/8
  • GPRS mobile station class B
  • Compliant to GSM phase 2/2+
  • Class 4 (2 W @850/ 900 MHz)
  • Class 1 (1 W @ 1800/1900MHz)
  • Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
  • Low power consumption: 1.5mA(sleep mode)
  • Operation temperature: -40°C to +85 °C

external image IM120417009_IComSat.jpg

There is a nice Tutorial HERE:

This shield comes with Antenna:


external image ITEAD-Studio-IComsat-v1.1.JPG




More information:
Schematic
Datasheet
SIM900 AT Command Manual
Demo Code (Arduino library)

SIM900 Library for Arduino 1.x
DOC_SIM900_Hardware Design_V2.00.pdf