As mentioned earlier, our project is the sum total of the
components: Microcontroller, GSM Module and two
Android applications. The individual working of each
components and their integration can be technically
broken down into the following subtasks:
• The microcontroller and GSM module communicate
with each other through USART communication.
• The microcontroller sends an SMS using the GSM
module on occurrence of one of the two events: (a)
when a button is pressed; (b) as an acknowledgement
reply when the user is saving new configuration settings.
• The microcontroller receives SMS through the GSM
module and retrieves the new configuration settings
from the SMS and saves the same in the microcontrollers
EEPROM.
• The android application named SecureU sends a Cry
for help SMS containing the GPS Location (of the
mobile in which it is installed) to a desired location
for example, Police Station.
• The android application SecureU Config stores the
new configuration from the user and sends them via
SMS to our device in a format understood by the
device.