Description

SIM908 GPS & Gsm/Gprs Quad Band Serial Modem

SIM908 module is a complete Quad-Band GSM/GPRS module which combines GPS technology for satellite navigation. The compact design which integrated GPRS and GPS in a SMT package will significantly save both time and costs for customers to develop GPS enabled applications. Featuring an industry-standard interface and GPS function, it allows variable assets to be tracked seamlessly at any location and anytime with signal coverage. Free GSM Antenna and GPS Antenna. Features: Dual SMA Antenna Connector for GSM and GPS, Dual Serial Port for GSM and GPS GSM standard AT Commands, GPS NMEA Protocol, Network and Ring LED , Rugged Simcard Holder

Intro

The SIM908 modem has a SIM908 GSM chip and RS232 interface while enables easy connection with the computer or laptop using the USB to Serial connector or to the microcontroller using the RS232 to TTL converter. Once you connect the SIM908 modem using the USB to RS232 connector, you need to find the correct COM port from the Device Manger of the USB to Serial Adapter. Then you can open Putty or any other terminal software and open an connection to that COM port at 9600 baud rate, which is the default baud rate of this modem.Once a serial connection is open through the computer or your microcontroller you can start sending the AT commands. When you send AT commands for example: “AT\r” you should receive back a reply from the SIM800 modem saying “OK” or other response depending on the command send.