SIM900A V4.0 Kit Wireless Extension Module GSM GPRS Board with Antenna

The SIM900A V4.0 Kit Wireless Extension Module is based on the SIM900A chip and features onboard power supply interfaces, including VCC5 for a 5V power supply and VCC4 for a 3.5–4.5V power supply. It comes with an SMA antenna interface (default) and IPXmini antenna connector, with a reserved reset interface for SIM900A. The module supports various power modes, including power-on self-starting (default) and controlled start, making it suitable for a wide range of applications.

  Key Features:  

• Power Supply Interfaces: Supports two power supply interfaces - VCC5 for 5V DC input (recommended current above 1A) and VCC4 for 3.5–4.5V input, suitable for lithium batteries.
• Serial Port Circuit: Supports 3.3V and 5V single-chip microcomputers, with TTL serial port compatibility. Features protection for serial port circuits.
• SIM Card Circuit: Equipped with an SMF05C ESD chip for enhanced protection and reliability.
• Antenna Circuit: Designed to ensure a short and straight connection, guaranteeing higher signal strength.
• Onboard Resources: Includes serial port circuit (with protection), antenna interface circuit (SMA bend female port), and SIM card circuit (flip SIM slot).
• Operating Temperature Range: Supports a wide operating temperature range from -30 to 80 ºC, making it suitable for various environments.

  Specifications:  

• Frequency Bands: Dual-band GSM/GPRS connectivity.
• GPRS Connectivity: Supports GPRS multi-slot class 10 (default) and GPRS multi-slot class 8 (option), ensuring reliable connectivity.
• On-Off Button: Includes an On-Off button for easy control and operation.
• Dimensions: Approximately 49x47mm, compact and space-saving design.
• Weight: Approximately 28g, lightweight and portable.

  Pin Description:  

• GND: Ground connection.
• SIMR: SIM900A RXD, TTL level.
• SIMT: SIM900A TXD, TTL level.
• RST: SIM900A reset, active low.
• VCC_MCU: Power supply pin for MCU communication.
• VCC5: DC 5V input.
• VCC4: DC 3.5–4.5V input.

  Package Includes:  

• 1 x SIM900A V4.0 Kit Wireless Extension Module GSM GPRS Board with Antenna.