📶 SIM900A V4.0 GSM/GPRS Wireless Module 📶
The SIM900A V4.0 module is a GSM/GPRS wireless communication board that allows your devices to send/receive data, SMS messages, and make or receive phone calls. It includes an external antenna for improved signal strength and reliability, making it ideal for IoT, remote control, and tracking systems.
✅ Technical Specifications:
- Model: SIM900A V4.0 GSM/GPRS Module.
- Frequency Bands: Dual-Band 900/1800 MHz.
- Operating Voltage: 5V DC (TTL interface).
- Communication Protocols: GSM, GPRS, SMS, Voice.
- Interface: UART (TX/RX).
- Peak Current: Up to 2A during transmission.
- Antenna: External antenna included for better signal reception.
- Indicators: Power and network status LEDs.
- SIM Type: Standard Mini SIM card.
- Dimensions: ~52 × 42 × 15 mm.
- Approx. Weight: 40 g.
🔹 Key Features:
✔ Supports voice calls, SMS, and GPRS data transmission.
✔ UART interface for easy integration with Arduino or Raspberry Pi.
✔ External antenna ensures stable and strong signal.
✔ Fully controllable via AT Commands.
✔ Ideal for IoT, automation, and remote monitoring.
✔ Low power consumption in standby mode.
📌 Common Applications:
- GSM/GPS tracking systems.
- SMS-based remote control projects.
- IoT and telemetry applications.
- Wireless alarm and monitoring systems.
- Educational and prototyping projects.
