Patent Publication Number: US-2015084433-A1

Title: Standalone power cord to automate electrical appliances for home automation

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority of Indian Provisional Patent Application No. 4301/CHE/2013 filed on Sep. 23, 2013, the disclosure of which is incorporated herein in its entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to the field of home automation and more specifically to a module enabling home automation. 
     BACKGROUND 
     Conventional home automation systems are controlled by equipment&#39;s installed at the customer premises. By programming an in-house device, a user controls the operation of appliances connected to a system. There are several disadvantages associated with the conventional home automation systems. For example, in the conventional home automation systems, the appliances are connected to the in-house device via smart switches. In the conventional home automation systems, the smart switches are connected to the in-house device via a wireless network. The use of wireless networks increases the overall cost of the system because each of the smart switches require separate wireless transceivers, wherein the conventional wireless transceivers are expensive. While the conventional home automation systems provide the user with home automation functionality, the high cost of the conventional home automation systems limits wide spread use. 
     The high cost of the conventional home automation systems are reduced to some extent by replacing the wireless network by a network based on power line communication. However, switches and power sockets in the existing electrical wiring in a building are required to be upgraded prior to the installation of existing power line communication. Upgrading the switches and power sockets depends on type of home automation system present in the building. Moreover, the existing power line communication based home automation systems do not provide any means to control existing appliances unless the existing appliances are sufficiently rigged/altered by an expert to be compliant with the system. 
     The conventional home automation systems provide a facility for switching ON and switching OFF electrical appliances. However, the conventional home automation systems fail to provide further control of the electrical appliances. If any further control over the appliance has to be implemented, the systems require considerable effort on the part of the appliance manufacturer and the designer to make the appliances compatible with the system. Yet another disadvantage of the current systems is that the current systems fail to provide means to access performance related data from the appliances connected to the system. 
     In light of the foregoing discussion, there is a need for a new system and method for implementing home automation with improved flexibility in a cost effective manner. 
     SUMMARY 
     The above mentioned needs are met by implementing a module for home automation in a cost effective manner. The system is a standalone power cord with a smart control module. The smart control module controls operation of an electrical appliance. The electrical appliance is controlled by a request initiated by a user. The smart control module enables switching ON and OFF the electrical appliance based on the request. Further, the smart control module fine-controls the functioning of the electronic appliance by regulating the operational parameters. 
     An example of a standalone power cord to control an electrical appliance includes a first electrical connector at one end of the standalone power cord. The first electrical connector connects the standalone power cord to a power source. The standalone power cord includes a second electrical connector at other end of the standalone power cord. The second electrical connector connects the standalone power cord to the electrical appliance. Further, the standalone power cord includes a smart control module to control the electrical appliance. The smart control module includes a smart link interface compliant-power cable (SLIC-P) module and a smart link interface compliant-socket (SLIC-C) module. The SLIC-P module enables switching ON and switching OFF the electrical appliance. The SLIC-C module enables the standalone power cord to fine-control one or more parameters of the electronic appliance. 
     An example of a method of controlling an electrical appliance includes receiving a request from a user of the electrical appliance. The request is received by a central unit to control the electrical appliance. The method includes transmitting the request as a signal by the central unit. The signal includes at least one of a data signal and a control signal. Further, the method includes decoding the signal by the standalone power cord. Furthermore the method includes controlling the electrical appliance based on the request. The controlling is performed by the standalone power cord. 
     The features and advantages described in this summary and in the following detailed description are not all-inclusive, and particularly, many additional features and advantages will be apparent to one of ordinary skill in the relevant art in view of the drawings, specification, and claims hereof. Moreover, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter, resort to the claims being necessary to determine such inventive subject matter. 
    
    
     
       BRIEF DESCRIPTION OF FIGURES 
       In the following drawings like reference numbers are used to refer to like elements. Although the following figures depict various examples of the invention, the invention is not limited to the examples depicted in the figures. 
         FIG. 1  is a block diagram of an environment, in accordance with which various embodiments of the invention can be implemented; 
         FIG. 2A  is a schematic diagram of a standalone power cord with a smart control module, in accordance with an embodiment of the present invention; 
         FIG. 2B  depicts front view of an electrical connector of a standalone power cord with the smart control module; 
         FIG. 2C  is a schematic diagram of a standalone power cord with bare wires exposed, in accordance with one embodiment of the present invention; 
         FIG. 3A  is a schematic diagram of a Smart Link Interface Compliant-Power (SLIC-P) module in a smart control module, in accordance with one embodiment of the present invention; 
         FIG. 3B  is a block diagram of a Smart Link Interface Compliant-Socket (SLIC-C) module in a smart control module, in accordance with another embodiment of the present invention; 
         FIG. 4  is a schematic diagram of a standalone power cord with a SLIC-P module, in accordance with one embodiment of the present invention; 
         FIG. 5  is a schematic diagram of a smart control module embedded in an electrical appliance, in accordance with another embodiment of the present invention; 
         FIG. 6  is a schematic diagram of a standalone power cord with a SLIC-C module embedded in the socket, in accordance with yet another embodiment of the present invention; 
         FIG. 7  is a schematic diagram of a standalone power cord with a SLIC-P and SLIC-C module embedded in electrical connectors, in accordance with yet another embodiment of the present invention; 
         FIG. 8  is a block diagram of a standalone power cord with a SLIC-P and SLIC-C module embedded in electrical connectors, in accordance with yet another embodiment of the present invention; 
         FIG. 9  is a flowchart illustrating method of controlling an electrical appliance, in accordance with one embodiment of the invention; and 
         FIG. 10  is a flowchart illustrating steps to control an electrical appliance, in accordance with another embodiment of the invention. 
     
    
    
     DESCRIPTION 
     Embodiments of the present disclosure described herein disclose a smart device for implementing a home automation system in a building without having the need for upgrading switches and power sockets in an existing electrical wiring of the building. Further, the present invention aids in eliminating the need for using expensive wireless networks to implement the home automation system. The present invention enables the electrical appliances to communicate via electrical wiring by making use of modules in accordance with an embodiment of the present invention. In one embodiment of the present invention, the modules are implemented within a smart detachable power cord of the electrical appliances. The smart detachable power cord includes modules for controlling the electrical appliances. In another embodiment of the present invention, the electrical appliances lack detachable power cords and the modules are integrated within the electrical appliances. The modules disclosed in the present invention are of two types, a Smart Link Interface Compliant-Power (SLIC-P) module and a Smart Link Interface Compliant-Socket (SLIC-C) module. 
     In the present disclosure, relational terms such as first and second, and the like, may be used to distinguish one entity from the other, without necessarily implying any actual relationship or order between such entities. The following detailed description is intended to provide example implementations to one of ordinary skill in the art, and is not intended to limit the invention to the explicit disclosure, as one or ordinary skill in the art will understand that variations can be substituted that are within the scope of the invention as described. 
       FIG. 1  is a block diagram of an environment  100 , in accordance with which various embodiments of the invention can be implemented. The environment  100  includes an electrical appliance  105 , a standalone power cord  110 , a central unit  115 , a power supply  120 , a remote control  125  and a socket  130 . The electrical appliance  105  is one of a refrigerator, an air conditioner, a television, a water heater, a microwave oven, a coffee maker, a lighting device, and a fan. The electrical appliance  105  is connected to the power supply  120  using the standalone power cord  110 . In order to control the electrical appliance  105 , a user initiates a request to the central unit  115  via a remote control  125 . The request is communicated to the standalone power cord  110  via electrical wiring in the building. The standalone power cord  110  decodes the request to control the electrical appliance  105 . 
       FIG. 2A  is a schematic diagram of a standalone power cord  200  to control the electrical appliance, in accordance with the present invention. The standalone power cord  200  is a detachable power cord. The standalone power cord  200  includes a first electrical connector  205 , a second electrical connector  215  and a smart control module  210 . The first electrical connector  205  is at one end of the standalone power cord  200 . The first electrical connector  205  connects the standalone power cord  200  to a power source. Further, the first electrical connector  205  provides electrical connection to the smart control module  210 . The smart control module  210  connects the first electrical connector  205  and the second electrical connector  215 . 
     The second electrical connector  215  is at other end of the standalone power cord  200 . The second electrical connector  215  connects the standalone power cord to the electrical appliance. The second electrical connector  215  includes a power terminal  220  and a signal terminal. In one embodiment of the invention, the signal terminal functions as a single terminal for data and control instructions. In another embodiment of the invention, the signal terminal functions as two independent terminals, data signal terminal and a control signal terminal. In some embodiments, the signal terminal can include multiple terminals. In another embodiment of the invention, at least one of a Light Emitting Diode and photo transistor pair is used as the signal terminal. The signal terminal is herein referred to as a data and control signal terminal  225 . The power terminal  220  supplies power to the electrical appliance. The data and control signal terminal  225  enables communication between a microprocessor in the electrical appliance and the smart control module  210 . The microprocessor provides a data interface and a control interface to the smart control module  210 . The smart control module  210  communicates with the microprocessor of the electrical appliance following any of the known or proprietary communication protocols including Serial Peripheral Interfaces (SPI), Universal Asynchronous Receiver/Transmitter interfaces (UART) and Inter-Integrated Circuit bus (I2C). In scenarios where electrical isolation is desired, optical transceivers using infrared and visible light or any other wireless means of communication, for example, near field communication (NFC), are used for the communication between the smart control module  210  and the microprocessor of the electrical appliance. It is to be noted that, the second electrical connector  215  can include any signal isolation transceiver. 
     The smart control module  210  controls the electronic appliance for home automation, based on a request from a user. The request is one of a data request and a control request. The user initiates the request via one of a remote control and a user interface. The request from the user is received by a central unit connected to the power supply. The central unit transmits the request as a signal to the standalone power cord  200 . The communication of the signal between the central unit and the smart control module  210  in the standalone power cord follows any of the known or proprietary power line communication protocols including PLC-BUS communication protocol, X-10 protocol, CE Bus protocol, and Home plug 1.0 protocol. In some embodiments, the protocol used can be other than power line protocols, such as zigbee, Wifi, Bluetooth etc. The smart control module  210  in the standalone power cord  200  receives the signal through electrical wiring in the buildings. The smart control module  210  further decodes the request from the signal. The smart control module  210  further includes a Smart Link Interface Compliant-Power cable (SLIC-P) module and Smart Link Interface Compliant-Socket (SLIC-C) module. The SLIC-P module enables switching ON and switching OFF the electrical appliance. The switching ON and switching OFF is performed based on the control request initiated by the user. The SLIC-C module enables fine-control of one or more parameters of the electrical appliance. The parameters include but are not limited to temperature, speed, brightness, and volume. The parameters are controlled based on the data request initiated by the user. 
       FIG. 2B  is a schematic diagram of the front view of the second electrical connector  215  within the standalone power cord  200  depicted in  FIG. 2A . The second electrical connector  215  includes the power terminal  220  and the data signal terminal  225 A and control signal terminal  225 B. The power terminal  220  supplies power to the electrical appliance. The data signal terminal  225 A and control signal terminal  225 B enables communication between a microprocessor in the electrical appliance and the smart control module  210 . The microprocessor provides a data interface and a control interface to the smart control module  210 . 
       FIG. 2C  is a schematic diagram of a standalone power cord with bare wires exposed, in accordance with one embodiment of the present invention. It is to be noted that, unlike in  FIG. 2A , where the standalone power cord has electrical connectors at either ends,  FIG. 2C  depicts the standalone power cord having one electrical connector at one end and the other end open. Such a configuration enables the manufacturer of the electrical appliance to easily integrate the power cord to the electrical appliance. An electrical connector includes a power terminal  230 , a data signal terminal  235 A, and control signal terminal  235 B. The power terminal  205  supplies power to the electrical appliance. The data signal terminal  235 A and control signal terminal  235 B enables communication between the electrical appliance and the smart control module  240 . The electrical connector  245  connects the standalone power cord  255  to the electrical mains. 
       FIG. 3A  is a schematic diagram of a SLIC-P module in a smart control module. The SLIC-P module  305  includes a signal decoder  310 , a relay switch  315 , and a microprocessor  320 . The signal decoder  310  is connected to power supply via a standalone power cord. The signal decoder  310  receives a request for controlling an electrical appliance via power lines in a building. When a user initiates the request at a central unit, the request is transmitted to the standalone power cord through the power lines. The communication of the signal between the central unit and the smart control module in the standalone power cord follows any of the known or proprietary power line communication protocols including PLC-BUS communication protocol, X-10 protocol, CE Bus protocol, and Home plug 1.0 protocol. The request is encoded at the central unit and transmitted as signals. The signal decoder  310  decodes data and control instructions from the signals. The decoded data and control instructions are sent to the microprocessor  320 . 
     The microprocessor  320  performs one of switching ON and switching OFF of the relay switch  315  based on the control instruction from the signal decoder  310 . The relay switch  315  provides a path for current flow between the first electrical connector and the second electrical connector of the standalone power cord. Therefore, the SLIC-P module  305  enables switching ON and switching OFF of the electrical appliance. In some embodiments, the signal decoder  310  can be replaced with a wireless module that supports any standard or proprietary wireless communication protocol. The proprietary communication protocols including but is not limited to SPI, UART and I2C. 
       FIG. 3B  is a block diagram of a SLIC-C module  325  in a smart control module, in accordance with the present invention. The SLIC-C module  325  includes a data acquisition module  330  and a monitor and control module  335 . The data acquisition module  330  acquires data pertaining to the electronic appliance. The data acquisition is performed by a data and control signal terminal on the standalone power cord. The data and control signal terminal enables communication between a microprocessor in the electrical appliance and the smart control module. Further, the monitor and control module  335  monitors the internal settings of the electrical appliance. Furthermore, the monitor and control module  335  controls internal settings to achieve fine-control of the electrical appliance. The fine-control is performed based on the data request decoded by the signal decoder  310  in the SLIC-P module  305  depicted in  FIG. 3A . The fine-control is performed by controlling one or more parameters of the electrical appliance such as temperature, speed, brightness, and volume. 
     In a first embodiment of the present invention, home automation is performed by a SLIC-P module in a standalone power cord.  FIG. 4  is a schematic diagram of a standalone power cord. The standalone power cord includes a first electrical connector  405 , a SLIC-P module  410 , and a second electrical connector  415 . The first electrical connector  405  connects to a power socket in an electrical wiring in the building and provides electrical connection to the SLIC-P module  410 . The SLIC-P module  410  connects the first electrical connector  405  and the second electrical connector  415 . The second electrical connector  415  provides electrical connection between the SLIC-P module  410  and an electrical appliance. The SLIC-P module  410  performs one of connecting and disconnecting the first electrical connector  405  and the second electrical connector  415  based on a power line communication signal from the power supply. Thus, with the help of SLIC-P module  410 , the standalone power cord controls the switching ON and switching OFF of the electrical appliance. 
     In a second embodiment of the present invention, home automation is performed by a smart control module implemented in an electrical appliance.  FIG. 5  is a schematic diagram of the smart control module  515  in an electrical appliance  505 . The electrical appliance  505  includes an appliance socket  510 . The appliance socket  510  includes the smart control module  515 , and a control terminal  520 . The smart control module  515  includes an integrated SLIC-P module and a SLIC-C module. The smart control module  515  decodes signals from a central unit and encodes information into the power supply wirings as signals. The smart control module  515  communicates with a microprocessor in the electrical appliance  505 . The microprocessor provides a data interface and a control interface to the smart control module  515 . The signal terminal  520  is one of a data signal terminal, a control signal terminal or a combination of the data signal terminal and the control signal terminal. The signal terminal  520  communicates with the microprocessor of the electrical appliance  505  following any of the known or proprietary communication protocols including SPI, UART and I2C. In scenarios where electrical isolation is desired, optical transceivers using infrared and visible light or any other means of signal isolation are used for the communication between the smart control module  515  and the microprocessor of the electrical appliance. The smart control module  515  enables monitoring and controlling of internal settings of the electrical appliance  505 . Further, the smart control module  515  is enabled to perform one of switching ON and switching OFF of the electrical appliance  505  based on decoded signals from the power supply wirings. 
     In a third embodiment of the present invention, home automation is performed by a standalone power cord and an electrical appliance.  FIG. 6  is a schematic diagram of a SLIC-P module embedded in the standalone power cord and a SLIC module embedded in appliance socket. The power cord includes a first electrical connector  605 , a SLIC-P module  610 , a second electrical connector  615  and an appliance socket  620 . The appliance socket  620  includes the SLIC-C module  625 . The SLIC-P module  610  receives a request from a user to control the electrical appliance. The SLIC-P module  610  receives the signals as signal from the electrical wiring in the building. The SLIC-P module  610  decodes the signals. Further, the SLIC-P module  610  enables “switch ON” and “switch OFF” of the electrical appliance. 
     The SLIC-C module  625  installed in the appliance socket  620  of the electrical appliance provides an exposed interface to the electrical appliance. Examples of the exposed interface include but are not limited to Serial Peripheral Interfaces and Universal Asynchronous Receiver/Transmitter interfaces, optical transceivers, or other means of signal isolation. The exposed interface of the SLIC-C module  625  acquires data pertaining to the electrical appliance. The SLIC-C module  625  is able to transfer data to and from the electrical appliance. Further, the SLIC-C module  625  is enabled to monitor and control internal settings of the electrical appliance. 
     In a fourth embodiment of the present invention, home automation is performed by a SLIC-P module and a SLIC-C module embedded in the electrical connectors of a standalone power cord.  FIG. 7  is a schematic diagram of the standalone power cord. The standalone power cord includes a first electrical connector  705  and a second electrical connector  710 . The first electrical connector  705  is at one end and the second electrical connector  710  is at the other end of the standalone power cord. The first electrical connector  705  is connected to power socket in the building. The first electrical connector  705  includes a SLIC-P module  715 . The SLIC-P module  715  receives signal from the electrical wiring in the building. The SLIC-P module  715  further decodes the signal. Further, the SLIC-P module  715  controls an electrical appliance based on the control signal decoded from the signal. 
     The second electrical connector  710  is at the other end of the standalone power cord. The second electrical connector  710  is connected to appliance socket of the electrical appliance. The second electrical connector  710  includes a SLIC-C module  720 . The SLIC-C module  720  acquire the data pertaining to the electrical appliance. The data is acquired by communicating with a microprocessor in the electrical appliance. Further, the SLIC-C module  720  monitors the internal settings of the electrical appliance. Furthermore, the SLIC-C  720  module fine-control the electrical appliance based on the data signal decoded from the signal by the SLIC-P module  715 . The fine-control is performed by regulating the parameters of the electrical appliance such as temperature, speed, brightness, and volume. 
       FIG. 8  is a block diagram  800  of a standalone power cord with a SLIC-P and SLIC-C module embedded in electrical connectors. The block diagram  800  includes a plurality of electrical appliances  830   a ,  830   b ,  830   c , and  830   d , a central unit  815 , a plurality of sockets  820   a ,  820   b , and  820   c , a plurality of SLIC-P modules  825   a  and  825   b , a plurality of smart control modules  835   a  and  835   b , and a main power supply  810 . The plurality of electrical appliances  830   a ,  830   b ,  830   c , and  830   d  are connected to the main power supply  810  through power lines in an existing electrical wiring of a building implementing the present invention. Examples of the plurality of electrical appliances  830   a ,  830   b ,  830   c , and  830   d  include but are not limited to a refrigerator, an air conditioner, a television, a water heater, a microwave oven, a coffee maker, a lighting device, an electric fan, a computer, a washing machine, a food processor and an induction stove. 
     A SLIC-P module among the plurality of SLIC-P modules  825   a , and  825   b , is embedded in a detachable power cord of an electrical appliance among the plurality of electrical appliances  830   a ,  830   b ,  830   c  and  830   d . The plurality of SLIC-P modules  825   a , and  825   b , is in communication with the central unit  815  through the power lines using a power line communication protocol. Examples of the power line communication protocols include any of the known or proprietary power line communication protocols including PLC-BUS communication protocol, X-10 protocol, CE Bus protocol, and Home plug 1.0 protocol. In some embodiments, the protocol used can be other than power line protocols, such as zigbee, Wifi, Bluetooth etc. The SLIC-P module is enabled to switch ON and switch OFF the electrical appliance by blocking current flowing through the power cord of the electrical appliance. Further, in the present invention, an SLIC-C module is installed in an electrical appliance among the plurality of electrical appliances  830   a ,  830   b ,  830   c  and  830   d . The SLIC-C module is enabled to transfer data to the electrical appliance and from the electrical appliance. Further, the SLIC-C module is enabled to monitor and control the internal settings of the electrical appliance. 
     A user is enabled to input instructions pertaining to controlling electrical appliances among the plurality of electrical appliances  830   a ,  830   b ,  830   c , and  830   d , to the central unit  815 . The central unit  815 , the plurality of sockets  820   a ,  820   b  and  820   c , the plurality of SLIC-P modules  825   a , and  825   b , and the plurality of smart control modules  835   a  and  835   b  provide the necessary control over switching ON and switching OFF of the plurality of electrical appliances  830   a ,  830   b ,  830   c , and  830   d . In one embodiment, the plurality of SLIC-P modules  825   a  and  825   b , and the plurality of smart control modules  835   a  and  835   b  are capable of wireless communication. In such a case, the user is enabled to input instructions pertaining to controlling the electrical appliances via one of a wireless network and the central unit  815 . 
     A first electrical appliance  830   a  among the plurality of electrical appliances  830   a ,  830   b ,  830   c , and  830   d , is connected to the main power supply  810  via a first SLIC-P module  825   a  and a first socket  820   a . The first SLIC-P module  825   a  is embedded in a first detachable power cord of the first electrical appliance  830   a . The first SLIC-P module  825   a  communicates with the central unit  815  via the power lines. The first SLIC-P module  825   a  is enabled to control switching ON and switching OFF states of the first electrical appliance  830   a.    
     A second electrical appliance  830   b  among the plurality of electrical appliances  830   a ,  830   b ,  830   c  and  830   d , is connected to the main power supply  810  via a second SLIC-P module  825   b  and the first socket  820   a . A SLIC-C module  840  is installed on a socket side of the second electrical appliance  830   b . The second SLIC-P module  825   b  communicates with the central unit  815  via the electrical wiring in the buildings and provides control over switching ON and switching OFF the second electrical appliance  830   b . The second SLIC-P module  825   b  is embedded in a second detachable power cord of the second electrical appliance  830   b . The SLIC-C module  840  communicates with the central unit  815  and enables transfer of data with the second electrical appliance  830   b . Further, the SLIC-C module  840  enables monitoring and controlling of internal settings of the second electrical appliance  830   b.    
     A third electrical appliance  830   c  among the plurality of electrical appliances  830   a ,  830   b ,  830   c  and  830   d , is connected to the main power supply  810  via a second socket  820   b . A first smart control module  835   a  is installed in the third electrical appliance  830   c . The first smart control module  835   a  of the second socket  820   b  communicates with the central unit  815  via the electrical wiring in the buildings. The first smart control module  835   a  is enabled to control switching ON and switching OFF states of the third electrical appliance  830   c . Further, the first smart control module  835   a  is enabled to monitor and control internal settings of the third electrical appliance  830   c  and to transfer data with the third electrical appliance  830   c.    
     A fourth electrical appliance  830   d  among the plurality of electrical appliances  830   a ,  830   b ,  830   c  and  830   d , is connected to the main power supply  810  via a third socket  820   c . A second smart control module  835   b  is installed in a third detachable power cord of the fourth electrical appliance  830   d . The second smart control module  835   b  of the third socket  820   c  communicates with the central unit  815  via the power lines. The second smart control module  835   b  is enabled to control switching ON and switching OFF of the fourth electrical appliance  830   d . Further, the second smart control module  835   b  is enabled to monitor and control internal settings of the fourth electrical appliance  830   d  and to transfer data with the fourth electrical appliance  830   d.    
       FIG. 9  is a flowchart illustrating a method of controlling an electrical appliance, in accordance with one embodiments of the present invention. The electrical appliance includes one of a refrigerator, an air conditioner, a television, a water heater, a microwave oven, a coffee maker, a lighting device, and a fan. 
     At step  905 , a request is received from a user of the electrical appliance. The user initiates the request via one of a user interface and a remote control. The request is received by a central unit to control the electrical appliance. The central unit encodes the request to generate a signal. 
     At step  910 , the request is transmitted as a signal to a standalone power cord. The signal is transmitted via the electrical wiring in the buildings connected to the power supply. The signal includes at least one of a data signal and a control signal. 
     At step  915 , the standalone power cord decodes the data and control signals from the signals. The standalone power cord fetches the signals through a first electrical connected attached to a power socket in the electrical wiring in the building. The standalone module includes a smart control module for automating the electrical appliance. The smart control module decodes the signal. Further, the smart control module identifies type of request. 
     At step  920 , the electrical appliance is controlled by the standalone power cord. The electrical appliance is controlled based on the request. The standalone power cord switch ON and switch OFF the electrical appliance, based on the control signal decoded by smart control module. Further, the standalone power cord regulate the electrical appliance to fine-control the electrical appliance based on the data signal decoded by the smart control module. 
       FIG. 10  is a flowchart illustrating steps to control an electrical appliance. 
     The flowchart begins at step  1005 . 
     At step  1010 , a central unit transmits a request to the module. The request depends on an instruction given by one of the user and the electrical appliance. The user inputs the instruction to the central unit via an input terminal of the central unit. The electrical appliance transmits the instruction to the central unit through power line communication. The request is transmitted to the module via power lines in a building where the present invention is implemented. The request is one of a control request and a data request or a combination thereof. 
     At step  1015 , the module receives the request from the central unit. The request is processed by a microprocessor in the module. The module contains an SLIC-P module integrated with an SLIC-C module. 
     At step  1020 , the module checks whether the request from the central unit is the data request or the control request. If the request is the control request, step  1025  is performed else if the request is the data request, step  1030  is performed. 
     At step  1025 , a control request is performed on the electrical appliance. The control request is one of a switching ON request, a switching OFF request, and a request to update internal settings of the electrical appliance. 
     At step  1030 , a data requested in the data request is acquired by the module from the electrical appliance and is transmitted to the central unit. An exposed data interface on the module facilitates finer control and data communication between the electrical appliance and the central unit thereby enhancing the existing electrical appliance to a smart device. In another embodiment, the data is received by the electrical appliance from the central unit. 
     At step  1035 , the module waits for another request from one of the central unit and the electrical appliance. 
     At the reception of a request, step  1010  is performed and the whole process repeats. 
     Advantageously, the embodiments in the present disclosure, a module to aid in implementing a home automation system in a building without having the need for upgrading switches and power sockets installed in an existing electrical wiring of the building is disclosed. The present invention is not limited to home appliances but is used wherever electrical appliance/outlet is desired to be controlled or monitored. The present invention eliminates the need for expensive wireless networks in home automation systems. Further, the present invention eliminates the need for providing add-ons and plug-ins in the home automation systems. Further, the present invention reduces the net infrastructure required to implement the home automation system, thereby reducing the cost involved in implementing the home automation system. Further, the present invention provides adaptability and penetration of home automation systems into a wide range of electrical appliances. Moreover, the present invention is implemented in power cords of electrical appliances thereby enabling the implementation of the home automation systems without major overhaul of the design of the electrical appliances by the appliance manufacturers. 
     In the preceding specification, the present disclosure and its advantages have been described with reference to specific embodiments. However, it will be apparent to a person of ordinary skill in the art that various modifications and changes can be made, without departing from the scope of the present disclosure. 
     Accordingly, the specification and figures are to be regarded as illustrative examples of the present disclosure, rather than in restrictive sense. All such possible modifications are intended to be included within the scope of the present disclosure.