• The GPRS Shield is based on SIM900 module from SIMCOM and compatible with and its clones.
• The GPRS Shield provides you a way to communicate using the GSM cell phone network.
• The shield allows you to achieve SMS, MMS, GPRS and Audio via UART by sending AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands).
• The shield also has the 12 GPIOs, 2 PWMs and an ADC of the SIM900 module(They are all 2V8 logic) present onboard.

• Quad-Band 850 / 900/ 1800 / 1900 MHz - would work on GSM networks in all countries across the world.
• 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 - 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.
• RTC supported.
• Selectable serial port.
• Speaker and Headphone jacks
• Low power consumption - 1.5mA(sleep mode)
• Industrial Temperature Range - -40°C to +85 °C

Application:

• M2M (Machine 2 Machine) Applications.
• Remote control of appliances.
• Remote Weather station or a Wireless Sensor Network.
• Vehicle Tracking System with a GPS module.

Cautions:

• Make sure your SIM card is unlocked.
• The product is provided as is without an insulating enclosure. Please observe ESD precautions specially in dry (low humidity) weather.
• The factory default setting for the GPRS Shield UART is 19200 bps 8-N-1. (Can be changed using AT commands).
• Power select - select the power supply for GPRS shield(external power or 5v of )
• Power jack - connected to external 4.8~5VDC power supply
• Antenna interface - connected to external antenna
• Serial port select - select either software serial port or hareware serial port to be connected to GPRS Shield
• Hardware Serial - D0/D1 of
• Software serial - D7/D8 of
• Status LED - tell whether the power of SIM900 is on
• Net light - tell the status about SIM900 linking to the net
• UART of SIM900 - UART pins of SIM900
• Microphone - to answer the phone call
• Speaker - to answer the phone call
• GPIO,PWM and ADC of SIM900 - GPIO,PWM and ADC pins of SIM900
• Power key - power up and down for SIM900

Note:

• The SIM900 Board Input is 5-26V 2A,We Recommended current is more than 9V 2A
• Ensure your SIM card is not locked
• GPRS Shield Communication baud rate is 19200 BPS 8-N-1

Package included:

• 1 x SIM900 GSM/GPRS Transmission Module

1. Datasheet - GPRS-GSM SIM900 MODULE