GSM/GPRS SIM900 Shield Module Send & Receive SMS Calls

GSM/GPRS SIM900 Shield Module Send & Receive SMS Calls provides a complete cellular communication solution for development projects and embedded systems. The module supports sending and receiving SMS messages and making and receiving voice calls over GSM/GPRS networks, making it suitable for remote control, alarm systems, telemetry devices, and tracking stations.

Key specifications:

• Network: GSM/GPRS 850/900/1800/1900 MHz.
• Power supply: DC 3.4–4.4 V (nominal 4.0 V).

• Power consumption:
- Sleep mode: approximately 7 mA.
- Active communication: approximately 220 mA, with peak currents up to 2.5 A.

• Operating temperature: −40 to +85 °C.

• Communication interfaces: UART with default settings 115200-8-N-1 for straightforward integration with microcontrollers and development boards.

• Command support: standard AT commands (GSM 07.07, 07.05) plus extended AT command set for advanced control.

• Messaging features: full SMS support with control and programming via AT commands.

• Data and networking: built-in TCP/IP stack and GPRS Class 10 support with CS-1 to CS-4 options for reliable and efficient data transfer.

• Antenna options: SMA and IPEX connectors to attach external or internal GSM antennas depending on application requirements.

• Audio and media: speaker and microphone inputs/outputs to support voice calls and audio-capable applications.

The SIM900 shield is designed for easy UART integration with microcontrollers such as Arduino and similar platforms, offering flexible power and connectivity options for a wide range of embedded cellular applications.