Basics of IoT
IoT
(Internet of Things)
refers to a network where devices communicate to devices and devices
communicate to software applications over the internet. This web-enabled
devices/internet enabled devices will usually collect data, send and act upon
data from their surrounding environment.
•
The
IoT network consists of Edge side (sensors, actuators and controllers
connected to the internet) and Cloud side.
•
The
devices on the Edge side can either connect to the internet directly or using
an Edge (IoT) gateway.
The Edge
gateway is used for:
• Providing a connection to the internet
for devices that cannot connect to the internet on their own. These devices don’t
have feature to connect to the Internet.
• Local functionality/control that must
work even without internet availability
• Edge analytics: Pre-processing the data before it is
sent to the internet services or data processing services that should be
available even when no internet connectivity is available
Basics of IoT – Cloud:
The cloud part
in an IoT network is divided in SaaS, PaaS and IaaS parts. The basic
explanation of those terms given below:
• SaaS (Software as a Service): the software applications that are
running on specific IaaS and example: do data processing or control of device
parameters or notify the users of certain states
• PaaS (Platform as a Service): Platform tools and services used to build the
software applications in the cloud
• IaaS (Infrastructure as a Service): Data centers, Virtual machines,
Firewalls, Network gateways/routers used to host the software applications
• IT Operations: Support and maintenance of the above
elements.
Figure 1 IoT ecosystem
This is called IoT ecosystem where the system consists of network of sensors, actuators, smart objects, cloud, smart hand held devices, and all these are connected to send a command or request for information over the network to an IoT enabled device.
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