GSM-GPRS Arduino SIM900A

Overview

The GSM-GPRS Arduino SIM900A module is a compact and powerful wireless communication solution that enables your Arduino projects to connect to the GSM and GPRS networks. Whether you need to send SMS alerts, make voice calls, or transfer data over the internet, this module provides a reliable and cost-effective way to add cellular connectivity to your IoT and embedded systems. With its quad-band frequency support and simple UART interface, it's the go-to choice for makers, students, and professionals across Egypt.

Key Features

• Quad-band GSM/GPRS (850/900/1800/1900 MHz) for global and local network compatibility.
• SMS, voice, and data support via AT commands.
• Low power consumption in sleep mode (1.5 mA) and typical operation (1 A).
• Easy integration with Arduino and other microcontrollers via UART (TTL) interface.
• Onboard voltage regulator and level shifting for 5V/3.3V compatibility.
• Compact size with standard 2.54mm pin headers for breadboard-friendly prototyping.
• LED indicators for power and network status.

Technical Specifications

• Supply Voltage: 5V (via Arduino) or 3.7V-4.2V (external battery)
• Operating Frequency: Quad-band 850/900/1800/1900 MHz
• Communication Interface: UART (TTL) with AT commands
• SIM Card: Standard SIM (1.8V/3.0V)
• GPRS Data: Download up to 85.6 kbps, upload up to 42.8 kbps
• SMS: Support for SMS text and PDU mode
• Audio: Voice calls with 6-pin audio jack (for external mic/speaker)
• Current Consumption: ~1A during transmission, 1.5mA in sleep mode
• Dimensions: 24mm x 24mm x 3mm (module only)

Applications & Use Cases

• IoT Projects: Remote monitoring, smart agriculture, and asset tracking.
• SMS Alert Systems: Home security, temperature alarms, and machine notifications.
• Voice Communication: Intercom systems or emergency call buttons.
• Data Logging: Sending sensor data to cloud platforms via GPRS.
• Remote Control: Control devices via SMS commands.
• Educational Projects: Learn about cellular communication and AT commands.

What's Included

• 1x SIM900A GSM/GPRS module
• 1x PCB breakout board with pin headers (soldered)
• 1x Helical antenna
• 1x Power and status LED indicators
• Note: SIM card, power supply (if not using Arduino), and audio accessories are not included.

Compatibility

• Arduino: Uno, Mega, Nano, and any board with UART (TX/RX) pins.
• Voltage: Works with 5V logic (e.g., Arduino), but for 3.3V boards, use a level shifter.
• SIM Cards: Standard SIM from Egyptian providers (Vodafone, Orange, Etisalat, WE) with 2G support.
• Software: Use AT commands via Serial Monitor or libraries like SoftwareSerial.

MOKWN Recommendation

For Egyptian makers, this SIM900A module is ideal for projects requiring reliable 2G connectivity. Ensure your SIM card is activated for 2G/GPRS. For 3G/4G projects, consider our SIM800L or SIM7600 modules. For quick prototyping, pair this with our Arduino Uno starter kit. If you need voice calls, remember to purchase an external mic and speaker. We recommend using a 5V 2A power supply for stable operation.