SIM900A RS232 GSM Modem

This is a low cost SIM900A GSM Modem with RS232 output.

It works on 12Volt AC as well as DC Supply. It is a Quad Band GSM/GPRS engine and works on frequencies 850/ 900/ 1800/ 1900 MHz. The modem has RS232 output so you can directly connect to PC's com port or to any micro-controller via MAX232 IC.

You can communicate with this modem using AT Commands. It also has provision for TTL output so you also connect it directly to your micro-controller via serial port.

We have Various sizes of GPS-GSM Module. Check out our complete collection of GPS-GSM Module.

Features of SIM900 GSM Modem

• Quad-Band GSM/GPRS 850/ 900/ 1800/ 1900 MHz

• RS232 interface for direct communication with computer or MCU kit

• Configurable baud rate

• SMA connector with GSM Antenna.

• SIM Card holder.

• Built in Network Status LED

• Inbuilt Powerful TCP/IP protocol stack for internet data transfer over GPRS.

• Normal operation temperature: -20 °C to +55 °C

• Input Voltage: 5V-12V DC

SIM900 GSM Module Specification

• Quad-Band 850/ 900/ 1800/ 1900 MHz

• GPRS multi-slot class 10/8

• GPRS mobile station class B

• Class 4 (2 W @ 900 MHz)

• Class 1 (1 W @ 1800MHz)

• Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)

• Supply voltage range : 3.4V to 4.5V

• Low power consumption: 1.0mA(sleep mode)

• Operation temperature: -40°C to +85 °C