Sim900a GSM Module

🔹 SIM900A GSM Module with Antenna – 5V / 1A

The SIM900A GSM Module is a compact and reliable GSM/GPRS board based on the SIM900A chipset from SIMCom. It allows your microcontroller (Arduino, ESP32, ESP8266, STM32, Raspberry Pi, etc.) to connect to the GSM network for SMS, voice calls, and GPRS data communication. With its onboard antenna connector and SIM card slot, it is ideal for IoT, remote monitoring, and wireless communication projects.

✅ Features:

• Part Number: SIM900A

• Frequency Bands: Quad-band 850 / 900 / 1800 / 1900 MHz

• Functions: SMS, Voice Calls, GPRS, TCP/IP via AT commands

• Interface: TTL Serial (UART) – AT command support

• Power Supply: 5V DC / 1A (up to 2A peak current)

• SIM Card Slot: Standard SIM (2G Network)

• Antenna Connector: SMA with included antenna

• Compact size, easy integration with Arduino & ESP boards

📦 Applications:
✔️ IoT Projects (Internet of Things)
✔️ Remote Monitoring Systems
✔️ GSM-based Security Systems
✔️ SMS and Call-based Notifications
✔️ Home & Industrial Automation
✔️ Wireless Data Transmission (GPRS)