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    IoT Unit1

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    shriyyanshshri

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    IoT Unit1

    Uploaded by

    shriyyanshshri
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    IoT_Unit1

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    3 views30 pages

    IoT Unit1

    Uploaded by

    shriyyanshshri

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 30

    An IoT device may consist of

     I/O interfaces for sensors


     Interfaces for Internet
     Connectivity
     Memory and storage interfaces
     Audio/video interfaces.
    Generic block diagram of
    an IoT Device
    IoT Protocols
    IoT Protocols
    Logical Design of IoT

    Logical design of an IoT system refers to an


    abstract representation of the entities and
    processes without going into the low-level
    specifications of the implementation.

    An IoT system comprises of a number of


    functional blocks that provide the system the
    capabilities for identification, sensing, actuation,
    communication, and management.
    IoT Communication Models

    Request-Response communication model

    Publish-Subscribe communication model

    Push-Pull communication model

    Exclusive Pair communication model

    WebSocket-based Communication APIs

    REST-based Communication APIs


    Request-Response communication model
    Publish-Subscribe communication model
    Push-Pull communication model
    Exclusive Pair communication model
    REST-based Communication APIs
    REST-based Communication APIs

    Representational State Transfer (REST) is a set of architectural principles by which


    one can design web services and web APIs that focus on a system’s resources and
    how resource states are addressed and transferred.

    • REST APIs follow the request response communication model.


    • The REST architectural constraints apply to the components, connectors, and
    data elements, within a distributed hypermedia system.
    REST-based Communication APIs

    Representational State Transfer (REST) Architectural Constraints are as follows

    1. Client _ server :
    2. Stateless :
    3. Cache_able :
    4. Layered System :
    5. Uniform Interface :
    6. Code on Demand :
    WebSocket-based Communication APIs
    IoT Enabling Technologies

    The following are the few technologies playing a key role in IoT

    1. WSN:
    2. Cloud Computing :
    3. Big data Analytics :
    4. Communication protocols:
    5. Embeded Systems:
    IoT Levels & Deployment Templates

    An IoT system comprises of the following components:


    • Device: An IoT device allows identification, remote sensing,
    actuating and remote monitoring capabilities.
    • Resource: Resources are software components on the IoT device
    for accessing, processing, and storing sensor information, or
    controlling actuators connected to the device. Resources also
    include the software components that enable network access for
    the device.
    • Controller Service: Controller service is a native service that
    runs on the device and interacts with the web services.
    Controller service sends data from the device to the web service
    and receives commands from the application (via web services)
    for controlling the device.
    IoT Levels & Deployment Templates

    • Database: Database can be either local or in the cloud and


    stores the data generated by the IoT device.
    • Web Service: Web services serve as a link between the IoT
    device, application, database and analysis components. Web
    service can be either implemented using HTTP and REST
    principles (REST service) or using WebSocket protocol
    (WebSocket service).
    • Analysis Component: The Analysis Component is responsible for
    analyzing the IoT data and generate results in a form which are
    easy for the user to understand.
    • Application: IoT applications provide an interface that the users
    can use to control and monitor various aspects of the IoT system.
    Applications also allow users to view the system status and view
    the processed data.
    IoT Level-1

    level-1 IoT system has a single node/device


    that performs sensing and/or actuation,
    stores data, performs analysis and hosts the
    application.
    Level-1 IoT systems are suitable for
    modeling lowcost and low-complexity
    solutions where the data involved is not big
    and the analysis requirements are not
    computationally intensive.
    IoT Level-2

    A level-2 IoT system has a single node that


    performs sensing and/or actuation and
    local analysis.
    • Data is stored in the cloud and
    application is usually cloud based.
    • Level-2 IoT systems are suitable for
    solutions where the data involved is big,
    however, the primary analysis requirement
    is not computationally intensive and can be
    done locally itself.
    IoT Level-3

    A level-3 IoT system has a single


    node. Data is stored and analyzed
    in the cloud and application is cloud
    based.
    Level-3 IoT systems are suitable for
    solutions where the data involved is
    big and the analysis requirements
    are computationally intensive.
    IoT Level-4
    IoT Level-4

    level-4 IoT system has multiple nodes that perform local


    analysis.
    Data is stored in the cloud and application is cloud-
    based.
    Level-4 contains local and cloud based observer nodes
    which can subscribe to and receive information
    collected in the cloud from IoT devices.
    Level-4 IoT systems are suitable for solutions where
    multiple nodes are required, the data involved is big and
    the analysis requirements are computationally intensive.
    IoT Level-5
    IoT Level-5

    A Level-5 IoT system has multiple end nodes and


    one coordinator node.
    The end nodes that perform sensing and/or
    actuation.
    Coordinator node collects data from the end nodes
    and sends to the cloud.
    Data is stored and analyzed in the cloud and
    application is cloud-based.
    Level-5 IoT systems are suitable for solutions based
    on wireless sensor networks, in which the data
    involved is big and the analysis requirements are
    computationally intensive
    IoT Level-6
    IoT Level-6

    A level-6 IoT system has multiple independent end


    nodes that perform sensing and/or actuation and
    send data to the cloud.
    Data is stored in the cloud and application is cloud-
    based.
    The analytics component analyzes the data and
    stores the results in the cloud database.
    The results are visualized with the cloud-based
    application.
    The centralized controller is aware of the status of all
    the end nodes and sends control commands to the
    nodes.
    Model Questions

    1) Why do IoT Systems have to be self adapting.


    2) What is the function of communication functional
    block in an IoT system.
    3) What are the architectural constraints of REST
    4) What is the role of Controller service in an IoT
    system
    5) Describe an example of IoT service that uses
    publish_subsribe communication model.
    6) Determine the IoT Levels for home automation
    IoT system including smart lighting and intruder
    detection.

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