Arduino SIM 900A Module

Arduino SIM900A GSM / GPRS Module The SIM900A GSM Module is a complete GSM/GPRS communication module that allows Arduino and other microcontrollers to communicate through a mobile network. It can be used for SMS messaging, voice calls, and GPRS data communication. The module communicates with Arduino through a UART serial interface using simple AT commands, making it suitable for IoT, remote monitoring, and automation projects. Specifications Product Type: GSM/GPRS Communication Module Module Model: SIM900A Network Technology: GSM / GPRS Dual Band Frequency Bands: 900MHz / 1800MHz Communication Interface: UART (TX/RX) Control Method: AT Commands Operating Voltage: 3.4V – 4.5V (SIM900A core) Module Supply: 5V compatible breakout boards available GPRS Class: Class 10 Data Speed: Up to 85.6 kbps (GPRS) SIM Card Support: Standard SIM Card (1.8V/3V) Antenna Interface: SMA Connector Baud Rate: 1200bps – 115200bps (9600bps default) Operating Temperature: -40°C to +85°C Audio Interface: Microphone & Speaker Support Dimensions: Approx. 49 × 47 mm (typical Arduino breakout board) Features Send and receive SMS messages Make and receive voice calls GPRS internet connectivity UART serial communication with Arduino Compatible with Arduino UNO, Mega, ESP boards, and other microcontrollers Built-in SIM card holder External GSM antenna connection LED indicators for power and network status Controlled using standard AT commands Suitable for remote communication applications Applications Arduino GSM projects IoT monitoring systems Remote control systems Smart home automation Security alarm systems GPS tracking systems Industrial monitoring SMS-based control devices Remote data logging systems Compatible Boards Arduino UNO Arduino Mega 2560 ESP8266 / ESP32 (with proper voltage levels) Raspberry Pi STM32 and other microcontrollers Package Includes 1 × SIM900A GSM/GPRS Module 1 × GSM Antenna 1 × SIM Card Holder (built-in) 1 × Connection Header Pins (depending on version) Important Note: The SIM900A is a 2G GSM module (900/1800MHz). Please confirm that your mobile network supports 2G service before using it. The module also requires a stable power supply capable of handling high current peaks (up to around 2A during transmission).