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

The SIM900A GSM GPRS Module for Arduino & Raspberry Pi | Wireless Communication Module enables cellular communication for IoT devices. It supports SMS messaging, voice calls, and GPRS data connectivity for remote monitoring and control applications.

Key Features

• Dual-band GSM 900/1800 MHz for India/Asia/Europe
• SMS send/receive capability via AT commands
• Voice call support with audio interface
• GPRS data connectivity for internet access
• UART TTL interface for microcontroller connection
• Low power modes for battery operation
• AT command control for all functions

Technical Specifications

Applications

• SMS alert systems for security and monitoring
• Remote monitoring with data transmission
• GPS tracking with location reporting via SMS
• IoT cellular connectivity
• Emergency alert systems
• Remote control via SMS commands

Important Notes

• Requires active SIM card with SMS/data plan
• Power supply must provide at least 1.5A peak current
• Add 1000μF+ capacitor near power pins for current spikes
• SIM900A is Asia/Europe version; SIM900 for quad-band worldwide
• Use SoftwareSerial library – hardware serial for debugging
• GPRS APN settings required for internet connectivity