CSK Infotronix

University Road, Rajkot, Gujarat

SIM300/900 GSM GPRS Modem Uses the extremely popular SIM300/900 GSM module   Provides the industry standard serial RS232 interface for easy connection to computers and other devices   Provides serial TTL interface for easy and direct interface to microcontrollers  Power, RING and Network LEDs for easy debugging Onboard 3V Lithium Battery holder with appropriate circuitry for providing backup modules Internal RTC  Can be used for GSM based Voice communications, Data/Fax, SMS, GPRS and TCP/IP Stack. Can be controlled through standard AT commands   Connections for Mic & Speaker. Module’s operation mode can be controlled through the PWR Switch connected to PWR pin    Comes with an onboard wire antenna for better reception. Board provides an optional adding an external antenna through an SMA connector  The SIM300 allows an adjustable serial baud rate from 1200 to 115200 bps (9600 default ) Modem a low power consumption of 0.25 A during normal operations and around 1 A during transmission   Operating Voltage: 7 – 15V AC or DC (board has onboard rectifier).