Arduino GSM Module SIM900



SIM900 Quad-band GSM GPRS Development Board for Arduino Antenna

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 Communication baud rate is 19200 BPS 8-N-1

The GPRS module is based on SIM900 module from SIMCOM and compatible with Arduino and its clones. The GPRS module provides you a way to communicate using the GSM cell phone network. The module 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 module 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


  •  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 arduino)
  •  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 Arduino
  •  Software serial - D7/D8 of Arduino
  •  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 breakout 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 breakout of SIM900
  •  Power key - power up and down for SIM900
  • Dimensions: 71.4mm X 66.0mm X1.6mm


Application Ideas:

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

SIM900 Arduino library with examples:

Wiring to Arduino

If you want the arduino to send SMS or connect to the GPRS network, this is the module for you. It can be used for applications like vehicle tracking, weather baloonsor even sending data from your weatherstation to your mobile as a SMS.

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Price: $79.00
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