Description

Synopsis:

             Device control by using Bluetooth low energy is the necessary one in modern world from desire location. Home automation is the control of any electrically and electronics device in our home and office, whether we are there or away. There are hundreds of products available that allow us to control over the devices automatically with raspberry pi model either by remote control or even by webpage. This Home automation system provide the user with mobile control of various lights by interfacing Bluetooth to raspberry pi. This system is designed to be low cost, low energy and expandable allowing a variety of devices to be controlled. Home automation and benefits will be focus on and how this can be achieved through the use of the raspberry pi and BLE device.     The Raspberry Pi is a credit card sized single computer or SoC uses ARM1176JZF-S core. System on a Chip is a method of placing all necessary electronics for running a computer on a single chip. Raspberry Pi needs an Operating system to start up. In the aim of cost reduction, the Raspberry Pi omits any on-board non-volatile memory used to store the boot loaders, Linux Kernels and file systems as seen in more traditional embedded systems. Rather, a SD/MMC card slot is provided for this purpose. After boot load, as per the application program Raspberry Pi will get execute.

Existing System :

             In Existing system devices are controlled either by remote control or even webpage along with ARM7 controller.

Disadvantages :

• High cost
• Not user friendly

Proposed System :

            This Home automation system provide the user with mobile control of various lights by using Bluetooth low energy along with  Raspberry pi.

Advantages :

• Low cost and expandable allowing a variety of devices to be controlled
• Saves money and energy and all in one user friendly system

Block Diagram : 

                  

Block Diagram Explanation :

             In this block diagram the whole system is controlled by Arm11  processor  and  this  processor  is  implemented  on Raspberry  Pi  Board. So this board is connected with monitor, SD card and IP connected through LAN. Those all components are connected by USB adaptors.  The home devices are connected to raspberry pi. One powerful feature of the Raspberry Pi is the row of GPIO (general purpose input/output) pins along the edge of the board. At the simplest levels, they are the switches that can turn on or off (input) or that the Pi can turn on or off (output). For practical purposes a relay driver circuit and relays can be interfaced with Raspberry Pi and appliances, respectively, for their controlling. A Relay is electrically operated switches, which allow low power circuits to switch a relatively high voltage or current on/off. For a relay to operate a suitable pull in and holding current should be passed through its coil. Relay coils are designed to operate from a particular voltage often its 5V or 12V. The function of relay driver circuit is to provide the necessary current energize the relay coil, when a LOGIC 1 is written on the PORT PIN thus turning on the relay. The relay is turned off by writing LOGIC 0 on the port pin. In our system four relays are used for device control. By giving command through smart phone Bluetooth we can communicate with the home appliances via Bluetooth on raspberry pi.

Hardware :

• Raspberry pi
• Monitor
• USB adaptors
• SD card

Software :

• Wheezy Raspian
• Opencv

Applications :

• Home automations
• Industrial applications