GSM Sim 800L Module

The GSM SIM 800L Module is a compact quad-band GSM/GPRS module for IoT applications. It supports SMS, voice calls, and GPRS data in a tiny form factor, making it ideal for space-constrained wireless communication projects.

Key Features

• Quad-band GSM 850/900/1800/1900 MHz worldwide
• Ultra-compact size with onboard antenna connector
• SMS send/receive capability
• GPRS data connectivity
• UART TTL interface at 9600 baud
• Low power sleep modes
• Bluetooth 3.0 (on some variants)

Technical Specifications

Applications

• Compact IoT devices with cellular connectivity
• SMS notification systems
• Portable GPS trackers
• Remote sensor data transmission
• Smart metering and utility monitoring
• Wearable alert devices

Important Notes

• Very sensitive to power supply – MUST provide 2A peak capability
• Use 1000μF+ electrolytic capacitor across VCC/GND
• Operates at 3.7-4.2V – do NOT connect 5V directly
• Use buck converter from 5V or connect directly to LiPo battery
• Network LED indicates status: 64ms blink=searching, 3s blink=connected
• Many clones exist – verify chip marking says SIM800L