Product Description: The GPRS Shield board is based on the SIM900 model from SIMCOM and is compatible with Arduino and its clones. The GPRS Shield provides connectivity via the GSM mobile network, integrating SMS, MMS, GPRS, and audio functions through UART with the transmission of AT commands.

Features:

• Quad-Band 850 / 900 / 1800 / 1900 MHz - operates on GSM networks worldwide.
• GPRS multi-slot class 10/8.
• Compatible with GSM phase 2/2+.
• Built-in control via AT commands - Standard commands: GSM 07.07 & 07.05, Enhanced commands: SIMCOM AT Commands.
• SMS service for sending network data.
• Integrated TCP/UDP stack.
• RTC support.
• Serial port selection.
• Ports for speaker and headphones.
• Low power consumption - 1.5mA in sleep mode.
• Industrial temperature range - -40°C to +85°C.

Applications:

• Machine-to-Machine (M2M) communication applications.
• Remote device control.
• Remote weather station or wireless sensor network.
• Vehicle monitoring system with GPS module.

Warnings:

• Ensure that the SIM card is unlocked.
• The product is supplied without insulation.
• Observe ESD precautions, especially in dry weather conditions.
• The default configuration of the GPRS Shield UART is 19200 bps 8-N-1 (can be changed with AT commands).
• Power supply can be from an external source or 5V of the Arduino.
• The power of the SIM900 is controlled via LED.
• Serial port selection - can be either software or hardware.

Note: The input of the SIM900 is 5-26V 2A. Recommended voltage is above 9V 2A. Ensure that the SIM card is not locked. The communication rate of the GPRS Shield is 19200 BPS 8-N-1.