SIM900A GSM GPRS Module for Arduino & Raspberry Pi | Wireless Communication Module

The SIM900A GSM Module is a compact and reliable GSM/GPRS communication module based on the SIM900A chip. Designed to provide voice, SMS, and data services over the 2G GSM network, this module is perfect for embedded applications that require mobile connectivity. It easily interfaces with Arduino, Raspberry Pi, and other microcontrollers via serial (UART) communication.

With support for AT commands, you can quickly send SMS, make calls, or transfer data through your microcontroller. It operates in dual-band GSM 900/1800 MHz frequencies, making it ideal for use in many regions (Note: SIM900A supports only selected countries; check your local GSM compatibility).

This module is widely used in IoT projects, home automation, remote monitoring systems, and vehicle tracking applications due to its efficiency, affordability, and ease of integration.

✅ Key Features:

• Dual-band GSM 900/1800 MHz

• Supports SMS, voice calls, and GPRS data

• Compatible with Arduino, Raspberry Pi, STM32, etc.

• AT command support via UART interface

• Low power consumption

• Onboard mic and speaker pins for audio projects

• Network status LED indicator

🛠️ Applications:

• IoT-based remote monitoring and control

• SMS-based home automation systems

• Vehicle tracking and security systems

• GSM-based weather stations

• Industrial equipment alerts via SMS

• Emergency communication devices