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Here is a comprehensive description of the SIM900A GSM/GPRS Module with Antenna:

???? SIM900A GSM/GPRS Module + Antenna

Description:

The SIM900A GSM/GPRS Module is a compact and reliable quad-band GSM/GPRS communication module based on the SIMCOM SIM900A chip. It allows mobile communication features such as voice calls, SMS messaging, and GPRS data transfer in embedded systems and IoT applications.

This module is widely used in Arduino, Raspberry Pi, and microcontroller-based projects. It includes a detachable antenna for better signal reception and typically features onboard connectors and pins for easy integration.

⚠️ Note: The SIM900A module is intended for Asian networks only and may not work in countries outside Asia unless unlocked or reprogrammed.

???? Features:

• GSM/GPRS Quad-Band: Operates at GSM 900/1800 MHz (SIM900A is dual-band, optimized for Asia)

• Supports: Voice calls, SMS, and GPRS (Internet data)

• AT Command Support: Communicates using standard AT commands via UART

• Communication Interface: UART (TTL level), suitable for Arduino, STM32, AVR, etc.

• Onboard SIM Card Slot: Standard SIM card support

• Antenna Included: External antenna for improved signal strength

• LED Indicators: Power and network status

• Voltage Range: 5V power supply (with onboard voltage regulation)

• Power Consumption: Peaks up to 2A during transmission—use a stable power source

???? Technical Specifications:

???? Common Applications:

• Remote weather stations

• GSM-based alert systems

• SMS-controlled appliances

• IoT devices with mobile connectivity

• Vehicle tracking and telemetry

• Home automation systems

✅ Why Use SIM900A?

• Easy to integrate with Arduino, ESP32, Raspberry Pi

• Reliable for basic SMS/call-based IoT systems

• Cost-effective solution for GSM-based communication in Asia

Let me know if you need:

• A sample Arduino circuit and code

• Differences between SIM900 vs SIM800

• A module with GPS or 3G support