Moduł SIM800A GSM GPRS UART TTL SMS antena 5V-18V do Arduino ESP32 STM32

SIM800A GSM/GPRS Communication Module with Antenna

The high-performance SIM800A module offers stable GSM and GPRS connectivity. It ensures reliable communication in the 900 MHz and 1800 MHz bands. The module is equipped with a power supply stabilization circuit that supports a wide range of input voltages, making it a versatile component for many electronic projects. The module is ready to use—it’s perfectly suited for the ESP8266, ESP32, Arduino, Raspberry Pi, and STM32.

Key Technical Features

• Model: SIM800A
• Supported frequencies: 900 MHz / 1800 MHz
• Power supply: 5V – 18V (requires a high-performance power source, up to 2A peak)
• Interface: UART (RS232/TTL) compatible with 3.3V and 5V logic
• Communication functions: GPRS (Class 10, up to 85.6 kbps), SMS, MMS, voice calls, HTTP, FTP, DTMF, PPP
• Connectors: SIM card slot, SMA for external antenna, IPX (u.FL)
• Current consumption: sleep mode approx. 10 mA, standby mode approx. 30 mA, transmission up to 2 A
• Operating temperature: -40°C to +85°C

Benefits of using the SIM800A module

• Reliable and flexible power supply: operation with a wide range of input voltages (5 V – 18 V) simplifies power supply selection compared to other popular solutions.
• Easy connection: no need for external logic level converters thanks to full compatibility with 3.3V and 5V circuits.
• Stable coverage: The included external SMA-connector antenna ensures excellent cellular signal quality.
• Versatile communication capabilities: built-in support for the most popular network protocols makes it easy to transfer data collected by sensors to servers.
• Quick diagnostics: The module allows for instant connection to a computer via a USB-TTL converter to send AT commands and test the connection.

Example applications

• Alarm modules that send SMS alerts and event notifications.
• Weather stations and telemetry systems that send real-time measurements.
• IoT devices operating in locations without Wi-Fi access.
• Building automation systems requiring independent, remote control.
• Machine and equipment monitoring systems using periodic GPRS transmission.