Product Description
The A259 SIM800 GSM GPRS Module is an all-in-one wireless communication solution designed for GSM voice calling, SMS messaging, and GPRS data transmission. With a wide input voltage range from 6V to 24V, the module is ideal for integration into various embedded systems. It is compatible with 3.3V and 5V TTL logic levels, making it an excellent fit for development platforms like Arduino, STM32, and 8051 microcontrollers.
This module features full SIM800c pin accessibility, a standard serial port for easy PC debugging, and voice support through a dedicated headphone and microphone interface. Its onboard electrostatic protection ensures SIM card safety, and the included backup battery supports stable communication.
Key Features
Supports GSM (voice/SMS) and GPRS network functions
Wide operating voltage range: 6V to 24V DC
Compatible with both 3.3V and 5V logic levels
Standard UART serial interface for PC communication and debugging
Onboard MIC and headphone jack for two-way voice communication
ESD-protected SIM card slot for safe operation
NET_STA indicator for network status monitoring
Backup battery included for power stability during communication
All SIM800c pins are broken out for custom development
Technical Specifications
| Feature | Specification |
|---|
| Power Supply Voltage | DC 6V to 24V |
| TTL Logic Level Support | 3.3V / 5V |
| Communication Interface | UART (Standard Serial) |
| Voice Call Support | Yes, via headphone/mic interface |
| SIM Card Protection | Electrostatic protection chip |
| Accessible Pins | All SIM800c pins |
| Status Indicator | NET_STA LED |
| Dimensions | 100mm x 60mm x 30mm |
| Backup Power | Integrated rechargeable battery backup |
How to Use
Power the module with a DC supply between 6V and 24V.
Connect to your microcontroller (Arduino, STM32, etc.) via the UART interface using either 3.3V or 5V logic.
Insert a valid SIM card into the protected SIM slot.
Monitor the NET_STA LED to confirm network registration.
Use AT commands via serial monitor or MCU firmware to send/receive SMS, make calls, or establish GPRS connections.
Optionally, connect headphones/microphone to enable voice communication.
Applications
Remote control and IoT device monitoring
GSM voice call and SMS alert systems
GPRS-based data logging and transmission
Smart appliances and industrial automation
Mobile security and access control systems
Package Includes
1 x A259 SIM800 GSM GPRS Module
1 x Backup Battery (pre-installed)
1 x Antenna (if included with variant)
Why Choose the A259 SIM800 Module?
With broad voltage support, dual logic compatibility, and built-in voice/SMS/GPRS functionality, the A259 SIM800 module is a robust choice for wireless communication projects. Its easy interfacing, safety features, and onboard diagnostics make it ideal for rapid development, testing, and deployment in a wide range of IoT and embedded applications.
