In recent years advancement in electrical engineering and communication technology is mainly focused on internet of things. IOT means Internet of things which basically means that interlinking of various hardware systems with internet via various internet protocols. This concept has been implemented drastically for enhancing performance and reducing efforts in individuals lifestyle. In this paper we have designed and developed a system in which user can prompt a voice command on smartphone platform, that voice command will be received by wireless fidelity module. The wireless fidelity module is programmed microcontroller unit which send signals to the input and output ports. These signals help in triggering the switching component in the system which accordingly switches various loads connected. Our system is not an experimental prototype but a system embedded on the grid for daily use. The secondary system connected to IOT system is illumination elements and ventilation elements in the room.
As finely stated by Charalampos Doukas, a senior solutions architect at Alexa Skills Business Dev wrote in his book, Building Internet of things using Arduino , It says that “A global network infrastructure, linking physical and virtual objects using cloud computing, data capture, and network communications. It allows devices to communicate with each other, access information on the Internet, store and retrieve data, and interact with users, creating smart, pervasive and always-connected environments.”
The system designed is a compact version of modified switchboard which is employed by replacing traditional switch boards. It can be employed in the places where the switchboards are too far from the operating appliance. While employing the system the previous electrical network need not to be uprooted. It is the main advantage of this system that it can be located on the end tail of electrical networks.
The crucial part of the system is placement of Wireless fidelity Router. The placement of Wireless fidelity Router is significantly explained by Jason Cole, a PhD student in physics at Imperial College London. He worked out on Helmholtz Equation to trace the most desired co-ordinates where the wireless fidelity router should be placed with respect to co-ordinates of the connected appliances in the system. According to Jason Cole following are the points should be considered while placing a wireless fidelity router.
The wires you plug into the router are probably used to set up in the edge of the room, but it’s better to run them over to a more middle spot. Ideally, it’ll be within reach of wherever you sit and use the Internet most.
Metal dematerialise electromagnetic energy quite methodically says Jason Cole.
“All materials reflect a portion of radiation. Some absorb it strongly, especially concrete,” Cole said. Enclosing the router with concrete on a couple sides won’t help your signal reach the furthest edges of your workspace.
Positioning a router’s antenna laterally can help you get a better signal upward. Pointing an antenna up helps the router reach farther crabwise.
Water inhibits hampers signals. Since humans are mostly fluid, a bunch of people hanging out in a room together can interact with the signal. You may have noticed getting worse Internet connections in crowded workspaces. And yes, you probably want a good Wi-Fi signal in the workspace where people like to gather, but all those bodies might slow it down in other parts of the home.
The Hardware used for developing the system consists of a transformer, a bridge rectifier, a voltage regulator, few capacitors and few resistors. The main component of the system is ESP8266, which is wireless fidelity module of the system. Opto-Couplers are also employed to separate electrical circuit from electronic circuit. Traic is used here as switching component which receives signals from Wi-Fi module for switching actions. The Load is connected to respective traics. The current rating of respective traics are decided considering the ratings of the load.
The Software used in the system has a pivotal significance because the voice commands are transmitted from smartphone platform to Wi-Fi module through Internet protocols. Google assistant is employed here to read and transmit voice commands from smartphone platform to ESP8266. The android app called IFTTT is used to follow a programmed schedule for switching actions. IFTTT means IF This Then That , In the if column the input schedule is programmed and further columns the output response are programmed. This is used for operating via voice commands.
Another method is for operating via touch gesture. It is used for creating user interface for touch gesture. This is an Android app Called Blynk. User needs to login using the google assistant credentials and this app gets synchronised to our system.
In the recent era of technology IOT is technology used for improving our lifestyle. The previous construction and also electrical networks come under the aesthetics of the environment. The system should be employed in such a way that these do not get hampered. The traditional environment of the system is built in such a way that, recent cabin partition has made the operating of the switchboards more complicated. There are conditions that many times the user has to operate the appliance and then enter the cabin. If user feels to operate it again then, he/she needs to come out and operate. This is very hectic and less comfortable process. Looking at this social problem. We decided to find out technological solution for this problem, which could enable user to make switching actions more comfortably. User will be able to operate the appliances in the cabin from the position where he/she is sitting using smartphone platform. This problem motivated us to design and develop the IOT based solution.
The ESP8266EX microcontroller integrates a Tensilica L106 32-bit RISC processor, which achieves extra-low power consumption and reaches a maximum clock speed of 160 MHz The Real-Time Operating System (RTOS) and Wi-Fi stack allow about 80% of the processing power to be available for user application programming and development. This module is programmed using Arduino IDE. It is responsible for receiving the signals from smartphone platform.
PC-817 is also known as an optocoupler. It consists of Infrared Emitting Diode (IRED). This IRED is coupled to a photo transistor optically and not electrically. It is closed in a four-pin package. PC 817 has an internal LED and a photo transistor. The photo transistors base becomes activate when LED throws light on it. The output obtained can be divided into two formats either common emitter or common collector. But the configuration is mostly common emitter. If the LED does not glow, transistor remains off and hence there will be no output generated by the optocoupler.
It is three terminal linear voltage regulator IC with a fixed output voltage of 5V which is useful in a wide range of applications. Currently, the 7805 Voltage Regulator IC is manufactured by Texas Instruments. It can deliver up to 1.5 A of current (with heat sink). It has both internal current limiting and thermal shutdown features. It requires very minimum external components to fully function. As Wireless fidelity module employed in system requires constant 5V DC, this voltage regulator gives desired supply to energise the module.
Google Assistant can interlink these personalised appliances or systems with a wide-range of voice control. Google Assistant supports both text or voice entry and is compatible to follow the conversation whichever entry method you’re using. It can control your devices of your smart home. It can access information from your calendar and other google widgets.
IFTTT service includes four different triggers, which are all variations on the same idea, It helps in creating phrases that you speak to Google Assistant. The triggers differ only in that some offer the ability to include a variable number, variable word, or both. Numbers and words can be passed as elements to be used with other supported IFTTT actions. It has widgets to choose from which we can build up our switching programmes.
Blynk is a open source software platform that allows you to quickly build interfaces for controlling and monitoring your hardware projects from your iOS and Android device. After downloading the Blynk app, you can create a project dashboard and arrange buttons, sliders, graphs, and other widgets onto the screen. Using the widgets, you can turn pins HIGH and LOW or display data from sensors. It is employed for making switching operations through touch gestures in the system.
In this paper, Automation is improved by employing a system called IOT based voice control Building Automation considering the main component as wireless fidelity module ESP8266. It interlinks the appliances via Wi-Fi and accordingly switching action takes place. There are two modes of operation provided. One is Active mode other is standby mode. In active mode, the system is operated as programmed. In standby mode we can use this system as traditional switchboard. We have designed and developed a working model to be embedded in live grid in allocated institute workspace. From the experiment we found that we can manage the switching actions through voice commands. This system provides low cost, high security, flexible and comfortable solution than traditional system.