www.researchdesignlab.com
Page 4
GSM GPRS SIM900A MODEM
REV1.0
Overview
GSM GPRS SIM 900A module with Stub Antenna and SMA connector-USB
GSM/GPRS Modem-RS232 is built with Dual Band GSM/GPRS engine- SIM900A,
works on frequencies 900/ 1800 MHz. The Modem is coming with RS232 interface, which
allows you connect PC as well as microcontroller with RS232 Chip(MAX232). The baud rate is
configurable from 9600-115200 through AT command. The GSM/GPRS Modem is having
internal TCP/IP stack to enable you to connect with internet via GPRS. It is suitable for SMS,
Voice as well as DATA transfer application in M2M interface. The onboard Regulated Power
supply allows you to connect wide range unregulated power supply . Using this modem, you can
make audio calls, SMS, Read SMS, attend the incoming calls and internet through simple AT
commands
