Description:

The SIM900A Modem incorporates the SIM900A GSM module from SIMCOM, a dual-band GSM-based modem. It operates within the 900MHz frequency range and has the capability to automatically search for these two bands. Additionally, the frequency bands can be configured using AT Commands. The baud rate can be adjusted within the range of 1200-115200 through AT commands as well. This ultra-compact wireless module features an interface that facilitates connections with both PCs and microcontrollers through the RS232 Chip (MAX232).

Designed for M2M applications, the SIM900A Modem is ideal for SMS, voice, and data transfer purposes. Its onboard regulated power supply accommodates a wide range of unregulated power sources. With this modem, you can effortlessly perform tasks such as making audio calls, sending and receiving SMS messages, reading SMS content, and handling incoming calls using simple AT commands. This SMT-type GSM module is a complete solution, incorporating a powerful single chip that enables its compact size. It offers serial and TTL outputs for easy integration and utilization.

Specifications:

• Frequency Bands: EGSM 900MHz and DCS 1800MHz

• GPRS: Multi-slot Class 10 (default), Class 8 (optional)

• Data Rates:

  • Download: Up to 85.6 kbps

  • Upload: Up to 42.8 kbps

• Transmit Power:

  • Class 4 (2W) at 900MHz

  • Class 1 (1W) at 1800MHz

• Power Supply: 3.4V to 4.5V (typical 4.0V)

• Power Consumption: ~1.5 mA in sleep mode

• Operating Temperature: -30°C to +80°C

• Storage Temperature: -5°C to +90°C

• Interfaces:

  • UART (baud rate: 1200 to 115200 bps)

  • RS232 (via MAX232 IC)

  • SIM card slot

  • SMA antenna connector

  • Audio input/output (MIC and speaker)

  • Keypad and display interfaces

• Dimensions: Approximately 24mm x 24mm x 3mm

Features:

• Dual-band GSM/GPRS engine
• Operates on frequencies: EGSM 900MHz and DCS 1800MHz
• GPRS multi-slot class 10/ class 8 (optional)
• Supports GPRS coding schemes: CS-1, CS-2, CS-3, and CS-4
• Utilizes GPRS/GSM technology for communication with a mobile SIM card
• Compatible with various microcontrollers such as Arduino and Raspberry Pi
• Suitable for embedded applications
• RS232 interface for direct communication with a computer or MCU kit
• Compact size
• Suitable for IoT-based projects and embedded systems
• Applications include voice call and SMS applications, IoT applications, and location tracking system.

Application:

• Cellular Communication.
• Home Automation.
• Security-based projects.
• Sensors monitoring.
  
• Mobile Phone Accessories.
• Servers.
• Computer Peripherals.
• Automobile.
• USB Dongles.

Country of origin China