7Semi M66 Quad-band GSM/GPRS Breakout 3.4V-4.4V

The 7Semi M66 Quad-Band GSM/GPRS Breakout is a compact and reliable communication module based on the Quectel M66 GSM/GPRS engine. It enables voice, SMS, and data transmission over 2G cellular networks, making it ideal for IoT, telemetry, and remote monitoring applications. With support for quad-band frequencies and a compact form factor, the module ensures global compatibility and stable performance. The breakout includes onboard voltage regulation, SIM card holder, antenna connector, and easily accessible pin headers, simplifying integration with microcontrollers and embedded systems.

Technical Specifications:

• Module: Quectel M66 GSM/GPRS Module
  
• Network Type: GSM/GPRS (2G)
  
• Frequency Bands: Quad-band – 850 / 900 / 1800 / 1900 MHz
  
• Operating Voltage: 3.4 V to 4.4 V (typical 4.0 V)
  
• Interface: UART (TX, RX), GPIOs, RI, DTR, PWRKEY
  
• Baud Rate: 9600 to 115200 bps (default 115200 bps)
  
• SIM Interface: Standard 1.8 V / 3 V SIM card
  
• Antenna Interface: U.FL / IPX connector for external antenna
  
• Power Consumption:
   – Idle: <1.0 mA
   – Active (transmission): up to 1.6 A peak
  
• Communication Protocols: GSM, GPRS, TCP/IP stack, SMS, voice, CSD
  
• Operating Temperature: -40°C to +85°C
  
• Dimensions: Compact breakout PCB with 2.54 mm header pins
  
• Indicators: Onboard power and network status LEDs
  
• Compatibility: Works with Arduino, ESP32, STM32, Raspberry Pi, and other MCUs
  
• Mounting: Breadboard-friendly through-hole headers

Features:

• Quad-band GSM/GPRS module for global 2G connectivity
  
• Supports voice calls, SMS, and GPRS data transmission
  
• Integrated TCP/IP stack for direct internet communication
  
• Onboard SIM card holder and antenna connector for easy setup
  
• UART interface for simple serial communication with microcontrollers
  
• Low power consumption suitable for battery-powered applications
  
• Compact design ideal for embedded and IoT development
  
• Power and network status LEDs for real-time monitoring
  
• Reliable performance over a wide temperature range
  
• Fully compatible with AT command set for easy control and configuration

Applications:

• IoT and M2M communication systems
  
• Remote monitoring and data logging devices
  
• GPS tracking and fleet management solutions
  
• Smart agriculture and environmental sensing systems
  
• Home and industrial automation with GSM connectivity
  SMS-based alert and control systems
  
• Vending machines and POS terminals with mobile connectivity
  
• Emergency communication and telemetry applications
  
• GSM-controlled relays and automation controllers