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GPS and GSM module interface

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HARDWARE

UBOX GPS & SIM 300 GSM MODULE INTERFACING

HARDWARE

1>STR 912 board

2>ublox lea 5h GPS module

3>SIM 300 gsm module


SOFTWARE

1>eclipse toolchain

2>open OCD


SYSTEM FUNCTION

If the system acknowledge a valid GPS FIX then a SMS is sent to mobile user by the system with GPS module latitude,longitude,time stamp and velocity information.


PROTOCOLS USED

sim 300 =>AT commands

GPS module => NEMA protocol

INTERFACE BETWEEN MODULE'S AND CONTROLLER

 UART => BAUD RATE  = 9600 
         STOP BITS  = 1
         START BITS = 1

         DATA LENGTH  = 8 bits

ALGORITHM

1> When the system starts then the GPS module is turned ON .

2> GPS module is configured to send only latitude,longitude,timestamp and velocity parameters using NEMA protocol.

3> WAIT till you get valid latitude and longitude.

4> Configure SIM300 module in text mode followed by mobile number and SMS containing valid parameters.

5> STOP

ANALOG ADD-ON BOARD

Analog Add-On Board

The Analog add-on board has the following features:

  • Temperature Sensor
  • Buzzer
  • LED array
  • DIP switches
  • USART
  • Anti-Tamper and Wakeup unit

Only the buzzer is used to indicate fall.

The schematic of the add-on board can be found hereĀ : File:Analog Schematic.pdf