SIM900A GSM GPRS Module with RS232 Interface and SMA Antenna
Integrate cellular communication seamlessly into your IoT applications and remote automation projects with the high-performance SIM900A Dual-Band GSM GPRS Wireless Modem Module. Operating on the standard 900MHz and 1800MHz network bands, this versatile wireless transceiver enables your microcontrollers to send or receive SMS text messages, make voice calls, and transmit GPRS mobile internet data packets. Outfitted with an on-board RS232 serial interface and TTL logic pins, it connects directly to popular hardware platforms like Arduino, ESP32, STM32, and Raspberry Pi without needing external level converters. The module features an integrated holder for standard network SIM cards, a dedicated hardware power reset circuit, and an onboard SMA connector bundled with an external high-gain stubby antenna to ensure reliable signal strength. Engineered to run efficiently within a 3.4V to 4.4V operational input voltage range (or up to 12V via dedicated adapter barrel jacks on specific breakout layouts), it is ideal for home security networks, weather monitoring stations, remote vehicle tracking setups, and custom industrial telemetry nodes. Buy authentic industrial-grade cellular modem modules online and get fast shipping across India.
₹ 942
₹ 1,250
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| Made In : | India |
The SIM900A GSM GPRS Module is a reliable cellular communication module designed for IoT, embedded systems, and remote communication projects. It enables SMS sending/receiving, voice communication, and GPRS data transfer over GSM networks. With RS232 interface and SMA antenna support, it is easy to integrate with microcontrollers, PLCs, Arduino, and industrial systems.
This module is widely used in remote monitoring systems, smart automation, and GSM-based alert systems.
Key Features
- Quad-band GSM/GPRS module (SIM900A chipset)
- Supports SMS, voice calls, and GPRS data communication
- RS232 serial interface for easy integration
- External SMA antenna for improved signal strength
- AT command support for full control
- Stable and reliable GSM connectivity
- Compatible with Arduino, ESP32 (via UART), and PLC systems
- Low power consumption modes
- Ideal for IoT and remote monitoring applications
Technical Specifications
| Parameter | Specification |
|---|---|
| Module | SIM900A GSM/GPRS |
| Network Bands | 850 / 900 / 1800 / 1900 MHz |
| Interface | RS232 / UART |
| Communication | SMS, Voice, GPRS Data |
| Voltage Supply | 5V DC (typical board level) |
| Antenna Type | SMA external antenna |
| SIM Support | Standard SIM card |
| Control | AT Command set |
| Data Rate | Up to 85.6 kbps (GPRS) |
How to Use
- Insert a valid SIM card into module slot
- Connect RS232/UART pins to microcontroller
- Provide stable 5V power supply with sufficient current
- Attach SMA antenna for network signal
- Use AT commands for SMS, call, or data operations
- Ensure proper grounding for stable communication
- Test network registration before operation
Applications
- GSM-based SMS alert systems
- IoT remote monitoring systems
- Smart energy meter communication
- Vehicle tracking systems
- Industrial automation alerts
- Home security and alarm systems
- Remote data logging systems
- Wireless communication projects
Package Includes
1 * SIM900A GSM GPRS Module with RS232 Interface and SMA Antenna
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