✅ GSM800L Module

Uses

SMS-based control systems

Remote monitoring via mobile networks

Making/receiving phone calls in IoT projects

Functions

Sends and receives SMS messages

Makes voice calls using AT commands

Connects to GSM network via SIM card

Features

Quad-band 850/900/1800/1900 MHz

Operates on 3.7V to 4.4V

Compact design, low power consumption

UART serial communication