GSM Module SIM900A

Description

🔹 Key Features

• Supports SMS, voice calls, and GPRS data

• Dual-band GSM: 900 / 1800 MHz

• UART serial communication (TX/RX)

• Controlled using standard AT commands

• On-board voltage regulator

• External antenna support for better signal

• LED indicators for power & network status

🔹 Technical Specifications

• Chipset: SIM900A

• Network: GSM / GPRS (2G)

• Frequency Bands: 900 / 1800 MHz

• Operating Voltage: 5 V (on-board regulation)

• Peak Current: Up to 2 A during transmission

• Interface: UART (Serial)

• SIM Card: Standard SIM

• Antenna Connector: SMA

• Data Speed: GPRS Class 10

• Control: AT Commands

🔹 Pin Description

• VCC: 5V power input

• GND: Ground

• TXD: Transmit data

• RXD: Receive data

• RST: Reset pin

• DTR: Sleep control

• SPK / MIC: Audio interface

🔹 Applications

• SMS-based alert systems 📩

• GSM-based home & industrial automation

• Vehicle tracking & security 🚗

• Remote data logging

• IoT communication systems 🌐

• Educational & training projects

🔹 Package Includes

• 1 × SIM900A GSM/GPRS Module

• 1 × GSM Antenna