ATK SIM800 GSM GPRS Module Development Board – 2G GSM, GPRS, SMS & Voice Call, 6V–24V

The ATK SIM800 GSM GPRS Module Development Board is designed for embedded applications requiring GSM-based wireless communication. It can be controlled through a serial UART interface using AT commands and supports functions such as voice calling, SMS communication, and GPRS data transfer.

The board's wide 6V–24V DC input and selectable/compatible 3.3V and 5V TTL communication levels make it convenient for integration with different microcontroller platforms. The exposed SIM800C pins provide additional flexibility for custom hardware development.

Features

• SIM800C-based GSM/GPRS development board.
• Supports GSM voice calls and SMS.
• Supports GPRS packet-data communication.
• Wide 6V–24V DC power input.
• Supports 3.3V and 5V TTL serial logic.
• UART/serial communication interface.
• AT-command control.
• Built-in microphone and headphone interface for voice calls.
• ESD protection for the SIM-card interface.
• NET_STA LED for module/network status indication.
• SIM800C pins are broken out for custom development.
• Integrated rechargeable backup battery.
• Suitable for Arduino, STM32, 8051, and other compatible controllers.

Applications

• IoT remote monitoring.
• GSM-based SMS alert systems.
• Remote equipment control.
• Home automation.
• Industrial monitoring and automation.
• Security and alarm systems.
• Remote data logging.
• GPRS telemetry.
• Agricultural monitoring systems.
• GSM-based access-control projects.
• Vehicle and asset monitoring applications.

How to Use

1. Insert a compatible SIM card into the SIM-card slot.
2. Connect a suitable GSM antenna to the board.
3. Connect an appropriate 6V–24V DC power source to the module.
4. Connect the controller's UART TX/RX/GND to the corresponding serial interface.
5. Select the appropriate 3.3V or 5V TTL logic level according to the connected controller and board configuration.
6. Power on the module and wait for the cellular module to initialize and register on the network.
7. Communicate with the module using supported AT commands.
8. Use the microphone/headphone interface when testing GSM voice calls.
9. Use GPRS AT commands and the module's supported network functions for remote data communication.

Important Notes

• SIM800 is a 2G GSM/GPRS technology, so local 2G network availability must be confirmed before purchase and deployment.
• Cellular modules can require significant current during GSM transmission bursts. Use a suitable, stable power source and adequate wiring; an unsuitable supply can cause resets or unreliable network operation.
• The stated 6V–24V input rating applies to the development board, not necessarily to the SIM800C cellular module itself.
• Confirm the board's TTL configuration before connecting a microcontroller.
• Do not connect incompatible RS232 voltage levels directly to a TTL UART interface.
• A working SIM card, compatible cellular network, and suitable antenna are required for GSM/GPRS operation.
• GPRS performance depends on network availability, signal strength, carrier configuration, and local service conditions.
• The backup battery is intended to support the board/module but does not replace an appropriately sized primary power supply.
• Antenna type and inclusion may vary by stock.
• Please allow approximately 5% measurement deviation due to manual measurement.
• Product appearance and component placement may differ from the product images depending on available stock.
• This module is intended for development and embedded communication applications; it is not a standalone cellular phone.

Package Includes

• 1 × A259 SIM800 GSM GPRS Module Development Board
• 1 × Backup Battery — Pre-installed
• 1 × Antenna — If included with the supplied variant