Hardware
The hardware of the circuit should be connected to the switchboard which we need to control. The hardware is a PCB board which is designed and prepared entirely through the PCB manufacturing process.
A clear picture of the Hardware can be viewed from here
As said before, this application is installed in the NOKIA S60 mobile phone. When the user wants to control a home appliance, he needs to open the application and select the particular option. When the option is selected it will be conveyed from the mobile phone via Bluetooth to the hardware section.
The application is connected with seven sensors through the hardware. The details from these seven sensors automatically get updated to the mobile through the microcontroller and Bluetooth module. ie, these details are not related to the user enquiry. The entire operations of the sensors are controlled by the microcontroller. The sensors are: Indoor Temperature sensor, Outdoor temperature sensor, Light sensor, Motion or PIR sensor and Three Door sensors.