SIM900A V4.0 GSM/GPRS Wireless Module Kit – Global Compatible with Antenna (Tested Worldwide) [Non Original]

SKU: FA2034
Model Version

V4.0 (Enhanced Edition)
Frequency Bands

Dual-Band GSM/GPRS 900/1800MHz
Input Voltage

DC 5V (Direct) or 3.4V – 4.4V (VBAT)
Peak Current

2.0A (Required during network bursts)
Communication

UART Serial (TTL Level 3.3V – 5V Auto-Compatible)
GPRS Class

Multi-slot Class 10/8
Antenna Interface

SMA Female (High-gain antenna included)
Operating Temp

-40°C to +85°C
Description
The SIM900A V4.0 Wireless Module Kit is a robust and highly integrated cellular communication solution designed for the modern Internet of Things (IoT) landscape. This V4.0 edition is an optimized, cost-efficient version of the classic SIM900A, featuring a dual-band GSM/GPRS engine that operates on the 900/1800MHz frequencies.
This kit is “Global Compatible,” meaning it has been tested for network registration across various international regions that maintain 2G infrastructure. Whether you are a hobbyist building a DIY home security system or a business purchaser sourcing reliable modules for industrial M2M (Machine-to-Machine) data logging, the V4.0 kit provides the stability and ease of use required for professional deployment. The board comes complete with a high-gain antenna and a streamlined power circuit, making it a “plug-and-play” solution for remote SMS control, voice communication, and GPRS data transmission.
Key Features
  • V4.0 Hardware Optimization: Improved power management and signal stability compared to earlier versions, specifically designed to handle the high-current demands of GSM transmission.
  • Dual-Band Capability: Operates on 900/1800 MHz, making it compatible with most GSM providers worldwide.
  • Full Wireless Services: Supports SMS (text), Voice (audio interface included), and GPRS (data) for comprehensive remote connectivity.
  • Universal Interface: Equipped with a standard TTL serial port (UART), allowing direct connection to Arduino, Raspberry Pi, STM32, and other 3.3V/5V microcontrollers.
  • Onboard SIM Slot: High-quality industrial SIM card holder designed for durability in high-vibration environments.
  • Industrial Grade: Built to operate in extreme temperatures, ensuring reliability for outdoor weather stations or factory floor monitoring.
Usage Guide
  1. Antenna Installation: Screw the included antenna onto the SMA connector. Warning: Do not power the module without an antenna, as it may damage the RF internal components.
  2. SIM Card Setup: Insert a standard-size SIM card (Mini-SIM). Ensure the card is 2G-enabled and the PIN code is deactivated.
  3. Powering Up: Connect a stable 5V/2A power supply. The onboard status LED will begin to blink; once it blinks slowly (every 3 seconds), it has successfully registered on the network.
  4. Connecting to MCU: Connect the module’s TXD to your MCU’s RXD, and the module’s RXD to your MCU’s TXD. Connect the GND pins together.
  5. Initial Test: Send the command AT via a serial monitor at 9600 baud. The module should return OK
Q: Is this module compatible with modern 4G/5G SIM cards?

Yes. Most 4G and 5G SIM cards are “downward compatible” and will work with the SIM900A, provided your local carrier still operates a 2G/GSM network

Q: Why does the module reboot when I try to send an SMS?

This is almost always a power supply issue. Sending an SMS or connecting to GPRS requires a sudden burst of current (up to 2A). Ensure your power source is rated for at least 5V/2A; a standard computer USB port (500mA) is often insufficient.

Q: What does "Non-Original" mean for this product?
This refers to the chipset being a high-quality, fully compatible alternative to the original manufacturer’s silicon. It uses the exact same AT Command set and pinout, offering identical functionality at a more accessible price point for bulk business purchasing.
Q: Can this module be used for voice calls?

Yes. The V4.0 board features audio input and output pins. By connecting a microphone and speaker, you can use AT commands to initiate and receive voice calls

Q: Does this kit include everything I need to start?

The kit includes the SIM900A V4.0 board and the GSM antenna. You will need a 5V power adapter and a microcontroller (like an Arduino) to begin programming

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