specification

SIM900 GPRS GSM Arduino Shield

GPRS Shield provides you GSM cell phone network to receive data from a remote. shield allows you to achieve this via three methods:

1. Short Message Service
2. Audio
3. GPRS Service

Features

• Item	Min	Typical	Max	Unit
  Voltage	4.8	5.0	5.2	VDC
  Current	/	50	450	mA
  Dimension(with antenna)	110x58x19			mm
  Net Weight	76±2			g

• Based on SIMCom‘s SIM900 Module
• Quad-Bahttp://simcomm2m.com/En/nd 850 / 900/ 1800 / 1900 MHz – would work on GSM networks in all countries across the world.
• Control by 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 augment your Arduino.
• Low power consumption – 1.5mA(sleep mode)
• Industrial Temperature Range  -40°C to +85 °C

Cautions

• Make sure your SIM card is unlocked.
• The product is provided without an insulating enclosure. Please observe ESD precautions specially in dry (low humidity) weather.
• The factory default setting of the GPRS Shield UART is 19200 bps 8-N-1. (It can be changed by AT commands).
• When using GPRS Shield with Seeduino Stalker, please remember to dismount the OK_READ Jumper (i.e. open it). This will disconnect the Battery Charger IC’s OK pin from the microcontrollers Digital Pin 7 and hence allow unhindered communication with GPRS Shield by using New Soft Serial Library.