Cellphone Based Project

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Transcript of Cellphone Based Project


The aim of the proposed system is to develop a cost effective solution that will provide controlling of home appliances remotely and enable home security against intrusion in the absence of homeowner. The system provides availability due to development of a low cost system. The home appliances control system with an affordable cost was thought to be built that should be mobile providing remote access to the appliances and allowing home security. Though devices connected as home and office appliances consume electrical power. These devices should be controlled as well as turn on/off if required. Most of the times it was done manually. Now it is a necessity to control devices more effectively and efficiently at anytime from anywhere.

In this system, we are going to develop a cellular phone based home/office appliance. This system is designed for controlling arbitrary devices, it includes a cell phone (not included with the system kit, end user has to connect his/her cell phone to the system) which is connect to the system via head set. To active the cellular phone unit on the system a call is to be made and as the call is answered, in response the user would enter a two/three digit password to access the system to control devices. As the caller press the specific password, it results in turning ON or OFF specific device. The device switching is achieved by Relays. Security preserved because these dedicated passwords owned and known by selected persons only. For instance, our system contains an alarm unit giving the user a remote on/off mechanism, which is capable of informing up to five different numbers over telephony network about the nature of the event.

The underlying principle mainly relies up on the ability of DTMF (Double Tune Multi Frequency) ICs to generate DTMF corresponding to a number or code in the number pad and to detect the same number or code from its corresponding DTMF. In detail, a DTMF generator generates two frequencies corresponding to a number or code in the number pad which will be transmitted through the communication networks, constituting the transmitter section which is simply equivalent to a mobile set. In the receiver part, the DTMF detector IC, for example IC MT 8870 detects the number or code represented by DTMF back, through the inspection of the two transmitted frequencies. The DTMF frequencies representing the number codes are shown below.BACKGROUND AND MARKET ANALYSIS The concept of home automation has been around for a long time and products have been on the market for decades, though no one solution has broken through to the mainstream yet. Home automation technology generally consists of two parts: the communication protocols to get data to and from home appliances, and the user interfaces for controlling them. There are dozens of existing home automation standards and protocols, the oldest of which surprisingly date back to 1975. Some are based on in-power line communication such as X10, INSTEON, and KNX, some are wireless such as Z-Wave and ZigBee, and some are internet-connected and utilize RESTful web-based API's like ioBridge. Many of the organizations behind these protocols have industry partners that at one point or another have pledged to build products using those standards. There are over 50 companies in the home automation industry in North America, yet the entire industry earns less than $1 billion in revenue annually, with the high-end market accounting for 82.2% of that in 2010. 32.6% of the market share is controlled by three main home automation companies: Crestron Electronics, Inc., AMX Corporation, and Control4. Many of these companies tend to have niche focus areas. Some are focused on the power monitoring and energy efficiency angle, such as Zero footprints Talking Plug, and some specialize in one specific appliance type, such as Lurtons very extensive lighting control systems. Others focus solely on the DIY market and instead of selling an integrated, productized solution, they sell computer chips and let customers hack away at their own control and monitoring projects. These include ioBridge and XBee. Two somewhat more interesting companies to recently enter the home automation foray are Google and Microsoft. At its 2011 I/O conference, Google announced Android@Home, an ambitious project in which it aims to install the android operating system on third party appliances. Google hasn't released too much to the market yet, but a big announcement is expected soon. Microsoft is similarly working on a project called HomeOS, an operating system for the home.

THE SYSTEM AND WORK PLAN The system I prototyped is only a small subset of the entire home automation system that I envision as a solution to most of these problems. I will first describe how the whole system would function, and then explain how the prototype fits within that vision.

There are four main products/features that make up the proposed system: Acomputer chipfor manufacturers to include in their appliances. It can be easily configured for any type of appliance. A smallBoxee-like boxwhich contains the hardware and software. It runs an embedded version of an operating system which manages the devices in the home. This is that entire home owners need to set up the system in their houses. Compatible appliances can be added to the house gradually over time as the customer sees fit. Interfacesfor all types of mobile devices. These allow customers to see their appliances, send them commands, as well as ask them status questions. It also allows creation of cause-and-effect-based "rules" that chain multiple appliance commands together in a logical way. An Apple-app-store-like"Rule Marketplace". When users create rules, they have the option of uploading them to the Rule Marketplace to share the rules others. The rules can either be offered for free or for a price. The computer chips for appliance manufacturers are small, wireless, devices that get included into the internal structure of a given appliance. The chips are powered from the same power source that the appliances use (usually mains power), and are as simple for manufacturers to use as the popular Arduino micro-controller platform.

The chips work in the following way: Theylisten for and execute commands. For example, the box may send an "off" command to a light fixture. The chip in the light fixture would recognize the command, and send the appropriate signal to the light to turn it off. Manufacturers configure the commands upon installation. Also, they can turn off-on required appliances say 3 appliances are to be turn on-off, 2 appliances or different combination can also be operated. The box is a small, wireless control that communicates with all of the home's appliances. It contains the software that serves up the user interface and also contains the storage space needed to remember user-defined settings and rules. It is the only thing home owners need to use the wireless system. Setting it up is cheap and easy: Step 1: Buy the box. Step 2: Plug it into an outlet. Step 3: That's it. Really, No further configuration needed. Whilenothing besides the box is required upon installation, users can add more automation functionality to their homes by purchasing and plugging in wireless controlled appliances, which automatically register themselves with the box when they power up for the first time.Appliances (and thus richer home automation functionality) can be added to the home gradually over time as budgets allow. In this way, users do not need to purchase a large home automation solution in one go. They can pick and choose what they want to add to the system and when they want to add it.The box works with any appliance until the output is connected to a particular appliance. Manufacturing of these appliances is distributed so customers are not forced to buy all from the same company, or to only have one type of compatible appliance.The interface to the system has the following features: Users can choose from anymobile or remote-based control system. The keypad section displays alist of appliancesin the home. When a user taps any key for a specific appliance, it will execute commandsthat can be sent to the appliance (i.e. "key 1 will turn on-off 1st and 2nd no. appliances "). Users can simply tap an action to make the device perform that action.

Problems with Existing Home Automation Solutions

Despite over 30 years of activity in the industry, none of the solutions in existence today have gone mainstream, leading me to conclude that home automation has essentially failed as a technology. By way of reading papers, talking to home automation users, and playing around with home automation products myself, thesuperficial reasonsseem to be the following:

Current systems areextremely expensiveand generally only cater towards upper-class families with large houses and estates. These solutions are often intended simply to help the family manage complex lighting or home entertainment systems. Current systems aredifficult to install. They require professionals to go to the customers' houses one or multiple times to install appliances and configure control systems. Current systems are generallydifficult to use. Companies seem to focus on either the technology or interface side of things, but not both. As a result, control interfaces tend to have small, poor quality, black and white LCD screens with lots of buttons that are difficult to navigate and program. Current systems tend to provide solutions foronly one appliance category, such as lights or blinds. Thus, if customers want to control multiple appliance types, they need to coordinate amongst multiple different companies and deal with multiple different systems in their homes. Current systems tend to provideeither monitoring or contro