SIM800L GSM GPRS Module

The SIM800L GSM GPRS Module with Micro SIM Slot is a compact and powerful solution that brings mobile communication to your electronics projects. Whether you’re designing an SMS-based alert system, enabling voice calling, or uploading sensor data via GPRS, this module provides a reliable interface between your microcontroller (like an Arduino, ESP32, or Raspberry Pi) and the GSM network.

This module supports quad-band GSM (850/900/1800/1900MHz), meaning it can connect to 2G networks worldwide. You can control it via standard AT commands through UART, making it compatible with most development boards and IDEs. Simply plug in a Micro SIM card with 2G service, connect power, and you’re ready to send messages, make calls, or connect to the web.

Despite its size, the SIM800L has industrial-level reliability. It’s widely used in remote weather stations, GPS trackers, vending machines, and home automation systems that require wireless communication.

Why Choose SIM800L for IoT?

• Low power consumption – Ideal for battery-operated projects.

• Compact form factor – Fits into tight enclosures or portable devices.

• Cost-effective GSM solution – Great for SMS alerts, remote access, and mobile data.

• Micro SIM compatibility – Saves space over standard SIM card modules.

Technical Specifications:

• Input Voltage: 3.7V to 4.2V DC
  (Do NOT power it directly from a 5V pin — use a buck converter or Li-ion battery)

• Current Requirements: Idle: ~20mA, Active (GPRS): Peaks up to 2A

• GSM Bands: 850/900/1800/1900 MHz (2G quad-band)

• SIM Card Type: Micro SIM (unlocked, 2G enabled)

• Data Protocols: TCP/IP, HTTP, FTP (via GPRS)

• Interface: UART (TX/RX), 9600 baud rate (adjustable)

• Antenna: Onboard pad or spring antenna (optional IPEX connector for external antenna)

• LED Indicator: Blinks to show network status

Usage Scenarios:

• SMS-based alerts for home security and intrusion detection

• Automated emergency notifications for water tanks, fire alarms, or gas leaks

• GPRS-based IoT data uploads (e.g., temperature, humidity sensors)

• Mobile GPS Trackers (when paired with GPS module)

• Remote lock/unlock systems for gates or smart homes

• Integration with Arduino IoT Projects using platforms like Blynk or ThingSpeak

For full control, use with the Arduino SoftwareSerial library or Hardware UART. You can combine it with ElectroWay’s Arduino Uno, IoT Development Kit, or regulated battery packs for portable solutions.

Local Availability:

Available now at ElectroWay – Johar Town, Lahore. Visit us or shop online for genuine components and expert advice.

Video Tutorial Resource:
How to Send SMS and Make Calls with SIM800L – YouTube

Precautions & Usage Tips:

• Use a 3.7V Li-ion battery or buck converter to power the module. 5V will damage it.

• Add a 1000μF capacitor across VCC and GND to stabilize power during transmission bursts.

• Use an external antenna if you’re in a low-signal area for better reception.

• Test with unlocked SIM cards and ensure 2G network availability in your region.

• If connecting to a 5V board like Arduino Uno, use a level shifter or voltage divider on the RX pin.

  Helpful Links & Related Products:

  • ElectroWay Tools & Accessories

  • Arduino Relay Modules

  • Home Automation Components

  • Arduino Starter Kit