SIM800A Wireless Module (GSM/GPRS/SMS)

The SIM800A Wireless Module is a GSM/GPRS/SMS communication module for electronic and robotics projects. It supports quad-band operation and can be controlled through UART and AT commands. The module includes GSM Phase 2.2 compatibility and supports GSM, GPRS, SMS, MMS, DTMF, HTTP, FTP, PPP dialing, telephone voice, and data transmission functions. It also provides LED indicators for network and call status, plus SMA and IPX antenna interfaces for connection options.

This module includes multiple power input options and serial-level support for microcontroller integration. It also features a reset pin, software power off, and USB connection for debugging. PCB interface labels are printed for easier secondary development.

Features of SIM800A Wireless Module (GSM/GPRS/SMS) - UART, 40x50mm

• Quad-band GSM support
• GPRS data transmission
• SMS send and receive support
• UART serial communication
• AT command control
• Network and call status LEDs
• SMA and IPX antenna interfaces
• Reset pin included
• USB debugging connection

Specifications of SIM800A Wireless Module (GSM/GPRS/SMS) - UART, 40x50mm

• Operating voltage: 3.3 to 5 V DC
• Power supply voltage range: 5 to 12 V DC
• Power supply requirements: 5V-18V
• Current needs: 1.5A or more
• Frequency bands supported: 850 / 900 / 1800 / 1900 MHz
• GSM Phase 2.2 compatibility
• AT commands: GSM 07.07, 07.05, and SIMCOM enhanced AT Commands
• Operating temperature: -40 to +85 °C
• Two LEDs for network and call status
• UART interface with TTL levels 2.85, 3.3, and 5 V support
• Dimensions: 40x50 mm
• Standby current: around 30MA
• Low power consumption: around 10MA
• Functions: SMS, GPRS data transmission, send MMS, DTMF, HTTP, FTP, PPP dialing
• Reset pin included
• TVS and magnetic bead protection devices
• SMF05C electrostatic release chip
• One way TTL interface
• Two antenna interfaces
• SMA antenna interface
• IPX MINI antenna interface

How to Use SIM800A Wireless Module (GSM/GPRS/SMS) - UART, 40x50mm

1. Connect the module to a suitable power supply within the supported range.
2. Wire the UART interface to a compatible microcontroller with the required TTL level.
3. Connect the antenna through the SMA or IPX interface.
4. Use AT commands to control GSM, GPRS, and SMS functions.
5. Use the reset pin or USB connection for debugging if needed.

More Info

• PCB interfaces are screen printed for secondary development.
• The board follows the SIM900A hardware design manual.
• The serial port circuit uses TVS and magnetic bead protection devices.
• The antenna circuit is designed to be short and straight.

Note: There is currently no telecommunication module registry law in the country, and the store is not responsible for any operational issues with these modules.