SIM800L V2 TTL Module

The SIM800L V2 TTL Module is a compact GSM/GPRS communication module designed for cellular connectivity in embedded and IoT projects. It supports quad-band GSM networks, enabling voice calls, SMS, and GPRS data transmission. With a TTL-level UART interface, it can be easily connected to microcontrollers such as Arduino, ESP32, or STM32. The module is commonly supplied with an external antenna to improve signal reception and reliability.

Technical Specifications:

• GSM bands: Quad-band 850 / 900 / 1800 / 1900 MHz
• Communication: GSM voice, SMS, GPRS data
• Interface: UART (TTL level, TX/RX)
• Operating voltage: Typically 3.7 V to 4.2 V (Li-ion compatible)
• Peak current consumption: Up to ~2 A during transmission bursts
• SIM card support: Standard SIM
• Antenna interface: External antenna via connector
• Operating temperature: Approximately −40 °C to +85 °C

Features:

• Compact and lightweight GSM/GPRS module
• Supports voice calls, SMS, and TCP/IP over GPRS
• TTL serial interface for easy microcontroller integration
• Low power consumption in idle and sleep modes
• External antenna support for improved signal strength
• Widely supported with AT command set

Applications:

• IoT and M2M communication systems
• Remote monitoring and control projects
• SMS-based alert and notification systems
• GSM-enabled data loggers
• DIY electronics and embedded communication projects