SIM800L GSM/GPRS Module with Antenna – Micro SIM, TTL UART Interface

The Small SIM800L GSM/GPRS Module is a compact and powerful GSM modem designed for a wide range of IoT applications. It enables core mobile functions such as sending/receiving SMS, making/receiving calls, and accessing the internet via GPRS with TCP/IP support. With quad-band compatibility (850/900/1800/1900 MHz), this module works reliably across global GSM networks.

The included wire antenna makes it ideal for space-constrained designs and offers strong signal performance—even when installed inside metal enclosures (antenna must remain outside).

Note: Always use a resistor divider when interfacing with Arduino to protect the module from over-voltage.

Features

• TTL serial interface for direct microcontroller communication

• No MAX232 required

• Automatic power-on and network registration

• Onboard status LED for signal indication

• Slow blink: network connected

• Fast blink: searching for signal

Specifications

• Chipset: SIM800L

• Operating Voltage: 3.7V–4.2V (Recommended: 4V)

• Peak Current: Up to 2A

• Power Consumption:

  • Sleep: < 2mA

  • Idle: < 7mA

  • GSM Transmission Avg: ~350mA

• Interface: UART (max 2.8V), AT command compatible

• SIM Slot: Micro SIM (bottom side)

• Frequency Bands: Quad-Band 850/900/1800/1900 MHz

• Antenna Connector: IPX

• Status Indicator: LED

• Operating Temperature: –40°C to +85°C

Module Dimensions

• Length: 24 mm

• Width: 26 mm

• Height: 4 mm

• Weight: 12 g

Package Includes

• 1 × SIM800L GPRS/GSM Module

• 1 × PCB Antenna

• 2 × Pin Headers