SIM900 GSM GPRS Wireless Transmission Module

SIM900 GSM GPRS Wireless Transmission Module Overview

The SIM900 GSM GPRS Wireless Transmission Module provides reliable 2G/GPRS communication and voice support in a compact package. Built around the proven SIM900 chipset, it is ideal for IoT devices, remote monitoring, telemetry, and any project that needs SMS, data or voice over cellular networks.

Key Features of the SIM900 GSM GPRS Module

• SIM900 chipset for broad GSM and GPRS compatibility and proven network stability.
• GSM/GPRS connectivity supporting data, SMS and voice services on 2G networks.
• Data rate up to 85.6 kbps (GPRS) for efficient data transfer.
• Voice support enables integration of voice call functionality into projects.
• UART interface (serial) for straightforward connection to microcontrollers such as Arduino and single board computers like Raspberry Pi.
• Compact form factor that fits in small enclosures and portable devices.
• Wide operating voltage from 3.4 V to 4.4 V for flexible power options.

Technical Specifications

• Chipset: SIM900
• Connectivity: GSM (2G), GPRS (2.5G)
• GPRS Data Rate: Up to 85.6 kbps
• Voice Support: Yes
• Interface: UART (serial)
• Operating Voltage: 3.4 V to 4.4 V

Interfaces and Integration

• UART (serial): Use standard AT commands over UART for configuration, data, SMS and voice control.
• Microcontroller compatibility: Easy to integrate with Arduino, ESP8266/ESP32, STM32 and Raspberry Pi via serial ports.
• Antenna and SIM: Requires an external GSM antenna and a standard SIM card for network access.
• Power: Use a stable, low-noise power supply within the specified voltage range and able to handle transmission current peaks to ensure reliable operation.

Typical Applications

• IoT devices and M2M communications
• Remote monitoring and telemetry systems
• Data logging and periodic reporting
• SMS alert systems and two-way messaging
• Voice call integration for remote control or monitoring

Quick Start Guide

1. Insert a valid, activated SIM card and connect an appropriate GSM antenna.
2. Connect the module to a regulated power supply within 3.4 V to 4.4 V and ensure the supply can handle transmission peaks.
3. Wire the module to your microcontroller or PC via UART (TX/RX) and common ground.
4. Open a serial terminal and send basic AT commands to test communication (for example, AT and AT+CSQ).
5. Use GPRS configuration commands and your APN settings to enable data, or use voice/SMS commands as needed.

Why Choose the SIM900 GSM GPRS Wireless Transmission Module

This module combines the proven SIM900 chipset with an easy-to-use UART interface and a compact footprint, making it a dependable choice for engineers and makers who need 2G connectivity for data, SMS and voice. Its broad compatibility and straightforward AT command set speed up development and deployment.

Notes

• Images are for illustration only. Actual product appearance may vary.
• Ensure your region still supports 2G networks before deploying in the field.