SIMCom SIM900A GSM Modem Module | Quad-Band Connectivity | SMS, Voice, Data for IoT
₹149.00₹250.00 (price_including_tax) (-40%)
Unlock global cellular communication for your embedded systems. Integrate reliable SMS, voice, and data capabilities into your next IoT prototype with ease. Built for consistent performance and straightforward hardware interfacing.
Robust SIMCom SIM900A module provides essential quad-band GSM/GPRS capabilities for IoT and M2M projects.
Achieve ubiquitous cellular communication across diverse regions with quad-band GSM support.
Experience consistent data and voice transmission, crucial for mission-critical IoT applications.
Simplified integration via AT commands and clear pinouts for rapid project development.
The Engineering Behind SIMCom SIM900A GSM Modem Module
The SIMCom SIM900A GSM Modem Module is an essential component for enabling cellular communication in embedded systems. At its core lies the powerful SIM900A chipset, designed to provide comprehensive Quad-band GSM/GPRS functionality, allowing devices to connect to cellular networks for sending and receiving SMS, making voice calls, and transmitting GPRS data. Its architecture integrates the necessary RF transceiver, baseband processor, and power management units into a compact form factor.
Engineered for reliability and ease of integration, this module is constructed with high-grade PCB material and robust soldering, ensuring stable operation in various environmental conditions. Its design prioritizes developer convenience, featuring clearly labeled pin headers and onboard indicators for network status and power, facilitating rapid prototyping and deployment for industrial and hobbyist applications.
Quad-Band GSM/GPRS Connectivity
The module supports 850/900/1800/1900 MHz frequencies, ensuring global compatibility across different cellular networks. This quad-band capability is critical for applications requiring deployment in diverse geographical regions, offering seamless roaming and reliable network access for continuous data and voice transmission without region-specific hardware adjustments.
AT Command Set Interface
Communication with the host microcontroller is achieved via a standard UART (serial) interface, utilizing a comprehensive AT command set. This universally adopted protocol simplifies development by abstracting complex cellular operations into simple, text-based commands, significantly reducing the learning curve and accelerating software integration for various embedded platforms.
Optimized for Performance & Integration
- Operating Voltage: 3.7V – 4.2V (module core, often 5V input with onboard regulator)
- Communication Interface: UART (Serial)
- Frequency Bands: GSM 850/900/1800/1900MHz
- GPRS Class: Multi-slot Class 10/8
- Onboard Features: SIM Card Holder, Antenna Connector, Status LEDs
- Power Consumption: Low power consumption in sleep mode
- SMS Support: Text and PDU mode
Features & Benefits
- Quad-Band GSM/GPRS: Ensures worldwide cellular network compatibility for global deployment and connectivity.
- Integrated SIM900A Chip: Provides stable and reliable performance for voice, SMS, and data communication.
- UART Serial Interface: Facilitates easy integration with microcontrollers using standard AT commands.
- Compact Module Design: Ideal for space-constrained projects, fitting seamlessly into various enclosures.
- Onboard SIM Card Slot: Conveniently accepts standard 2G SIM cards for immediate network access.
- Low Power Consumption: Optimizes battery life for portable and energy-sensitive IoT applications.
Pro-Grade Advantages
- Cost-effective solution for basic GSM/GPRS functionality.
- Widely documented and supported by the open-source community.
- Compact form factor suitable for embedded projects.
- Reliable cellular connectivity for M2M and IoT.
Technical Considerations
- Limited to 2G networks; not suitable for 3G/4G/5G applications.
- Requires external antenna and proper power supply for stable operation.
What is the primary function of the SIM900A GSM Modem Module?
The SIM900A GSM Modem Module enables embedded systems to establish cellular communication for sending/receiving SMS messages, making/receiving voice calls, and transmitting/receiving GPRS data over 2G networks.
What power supply voltage does the SIM900A module require?
The SIM900A module typically requires a stable 3.7V to 4.2V supply directly to the SIM900A chip, often provided by an onboard voltage regulator when powered from a 5V source like an Arduino.
How does the SIM900A module communicate with a microcontroller?
It communicates via a standard UART (Universal Asynchronous Receiver/Transmitter) serial interface. Developers send AT commands to the module to control its functions.
Can the SIM900A module be used for 3G or 4G networks?
No, the SIM900A module is designed exclusively for 2G GSM/GPRS networks. It is not compatible with 3G, 4G, or 5G cellular technologies.
What types of antennas are compatible with this module?
The module typically uses a 50-ohm impedance antenna, often a small helical, whip, or external magnetic mount antenna, connected via a U.FL or SMA connector depending on the module’s design.
Is a SIM card required for operation?
Yes, a standard 2G-enabled SIM card from a cellular provider is required to access the GSM/GPRS network for communication services.
| Specification | Value |
|---|---|
| Chipset | SIM900A |
| Network Type | GSM/GPRS Quad-Band |
| Frequency Bands | 850/900/1800/1900MHz |
| Operating Voltage (Module Core) | 3.7V – 4.2V |
| Logic Level Voltage (UART) | 3.3V / 5V Tolerant |
| Communication Protocol | UART (AT Commands) |
| GPRS Multi-slot Class | 10/8 |
| GPRS Mobile Station Class | B |
| Antenna Connector | U.FL or SMA (module dependent) |
| SIM Card Slot | Standard (2G compatible) |
| Baud Rate Support | 1200 bps to 115200 bps |
| Current Consumption (Sleep) | < 2.5mA |
Additional information
| Brand | SIMCom |
|---|---|
| Technology | GSM/GPRS |
| Operating Voltage | 3.7V – 4.2V |
| Control Interface | UART (AT Commands) |
| Connectivity | 2G Cellular |
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