Description

SIM800L GSM GPRS Module

The SIM800L GSM GPRS Module is a compact GSM/GPRS communication board designed for embedded systems, IoT devices, remote monitoring, and wireless control applications. Supporting quad-band GSM networks (850/900/1800/1900MHz), it enables reliable voice calls, SMS messaging, and GPRS data transmission through a standard UART interface.

This product is offered in two hardware options:

• SIM800L Module (No Antenna)
• SIM800L Module (External Antenna Included)

Both versions are refurbished, electrically tested, and verified for normal operation before shipment, providing a cost-effective solution for development, prototyping, maintenance, and replacement projects.

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Product Variants

Choose the version that best fits your application.

Both variants provide identical electrical performance and firmware functionality.

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Why Choose This GSM Module?

Built around the trusted SIM800L chipset, this compact communication module offers reliable wireless connectivity with low power consumption and broad compatibility.

Key Features

• SIM800L GSM/GPRS chipset
• Quad-band GSM support
• SMS messaging
• Voice call capability
• GPRS data transmission
• UART serial communication
• Compact PCB design
• Supports external antenna
• Low power consumption
• Compatible with 3.7V–4.2V supply
• Ideal for IoT applications
• Fully tested before shipment

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Technical Specifications

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Typical Applications

This GSM Communication Module is suitable for a wide variety of wireless embedded systems, including:

• IoT devices
• GPS trackers
• Remote monitoring
• SMS alarm systems
• Smart agriculture
• Smart home automation
• Industrial controllers
• Vehicle tracking
• Wireless sensor nodes
• Access control systems
• Data acquisition terminals
• Embedded communication projects

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Compatible Development Platforms

The GPRS Module communicates through a standard UART interface and integrates easily with many popular development boards.

Compatible platforms include:

• Arduino UNO
• Arduino Nano
• ESP32
• ESP8266
• STM32
• Raspberry Pi
• PIC
• AVR
• ARM development boards

If you’re building a compact embedded controller, our Nano V3 CH340 ATmega328P Development Board provides an excellent companion for serial communication projects, while the 40mm 8Ω Speaker can be paired for voice playback and audio notification applications.

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Power Supply Recommendations

For stable operation, the module requires a well-regulated 3.7V–4.2V power supply capable of delivering at least 2A peak current during network transmission.

To improve stability:

• Use a low-impedance power source.
• Keep power leads short.
• Add a large electrolytic capacitor (typically 1000µF or higher) near the power input if using long wires or battery supplies.

These practices help reduce voltage drops during GSM transmission bursts.

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 Refurbished and Fully Tested

This product is not factory new.

Each module has been  refurbished, cleaned, visually inspected, and electrically tested before shipment to ensure normal operation.

Refurbished modules provide an economical solution for developers, educational projects, equipment maintenance, and repair applications while maintaining reliable performance.

The appearance of individual modules may show minor cosmetic signs of previous use, but this does not affect functionality.

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Package Includes

Choose one option:

• 1 × SIM800L GSM GPRS Module (No Antenna) or

• 1 × SIM800L GSM GPRS Module
• 1 × External GSM Antenna

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Getting Started

Programming is straightforward using standard AT commands over a UART interface.

If you’re new to the platform, the official SIMCom AT Command Manual provides detailed instructions for SMS, voice calls, TCP/IP communication, and GPRS configuration.  https://simcom.ee/documents/SIM800L/

For a practical hardware demonstration, this Arduino + SIM800L tutorial walks through wiring, power requirements, and AT command testing: https://www.youtube.com/watch?v=qugcj6TMlIg

Many also pair this with Arduino boards.

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FAQ

Q1: Is this module brand new?

No. This product is refurbished. Every unit is cleaned, tested, and verified to function correctly before shipping. Minor cosmetic wear may be present but does not affect performance.

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Q2: What is the difference between the two variants?

Both versions use the same SIM800L hardware and firmware. The only difference is whether an external GSM antenna is included.

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Q3: Can I use this module with Arduino or ESP32?

Yes. The module communicates through UART and is compatible with Arduino, ESP32, STM32, Raspberry Pi, and many other microcontroller platforms that support serial communication.