SIM900A GSM GPRS

The SIM900A GSM GPRS Wireless Extension Module Board with Antenna is a versatile communication module designed to bring mobile network connectivity to your electronics and IoT projects. It supports GSM 900/1800 MHz bands, allowing reliable SMS messaging, voice calling, and GPRS internet data in supported regions.

This module communicates via serial UART, making it fully compatible with popular development platforms like the Arduino UNO, NodeMCU, and Raspberry Pi. Simply connect it via TX/RX pins and send AT commands to make calls, send texts, or fetch data from the internet.

Thanks to the included external antenna, the SIM900A ensures better signal quality, even in weak coverage areas. Whether you’re building a remote alert system, a home automation SMS interface, or a wireless data logger, this module is a perfect fit.

Specifications :

• Size: 49mm*50mm
• Weight: 38 g
• Onboard two set power supply interface VCC5 5V power supply, VCC4 interface, 3.5v-4.5V power supply, optional power on self starting (default) and control start.
• Onboard SMA (default) and IPXmini antenna interface, SIM900A interface reserved reset.
• Support 2, mobile phone 3,4G card
• Low power consumption: 1.0 mA (sleep mode)
• Serial port circuit: support for 3.3V single chip microcomputer
• TTL serial port: support 3.3 and 5V single chip microcomputer.
• Antenna interface circuit(SMA bend female port)
• SIM card circuit(flip SIM slot)

The computer can give early computer debugging USB module power supply, a very large amount of data under the condition of the recommended current more than 1A. Standby dozens of MA data can be set to provide dormancy, dormancy of 10MA low power.

✅ Technical Specifications:

• Operating Voltage: 5V–12V DC

• Frequency Bands: GSM 900/1800 MHz

• Network Support: SMS, Voice, GPRS Data

• Interface: UART (TX/RX)

• Baud Rate: 9600 (default)

• SIM Card: Standard size

• Antenna: External screw-mount antenna (included)

• Compatible With: Arduino, Raspberry Pi, ESP8266, STM32

  🌐 Common Applications:

  • Remote monitoring systems

  • IoT devices with GSM backup

  • SMS-based home automation

  • Security and alert systems

  • GPRS-based weather stations and trackers

  For stable power delivery, pair this module with ElectroWay’s 5V/2A regulated power adapter. For beginners, it integrates perfectly with the Arduino UNO Starter Kit or IoT Project Kits from ElectroWay.

  📍 Available now at ElectroWay – Johar Town, Lahore. Order online or visit our store for expert guidance and fast delivery.

  📺 Video Tutorial:
  How to Send SMS and Make Calls with SIM900A – YouTube Guide

Package Included :

SIM900A GSM Module *1

Antenna *1