Hello, everyone. I hope you are wondering welcome to the section number
three where we are going to talk about Bluetooth and ple.
so this is video number three point one and we
will
get started with history about Bluetooth and ble
so let's get started with that.
So in 1996 Intel accent and
Nokia plan to standarize short range
radiator communication between different products and
Industry. So the guy Jim
from Intel who suggested the name
Bluetooth actually taken from the King harlot.
So Bluetooth is managed by a Bluetooth sake which
is special interest group and the eye Tripoli
standard is 8 or 2.15.1 and
according to the survey of 2021 Bluetooth
module Shipment has
been reached to the 4.7 billion and which is increasing with
the passage of time.
So now the question is how it works.
So we have two different Technologies one
is Bluetooth classic and the other is Bluetooth low
energy. So firstly we will talk about Bluetooth classic in
early days. We have only two use
cases, like people use wireless headphones
or wireless speakers are transfer the
data from Mobile to PC or mobile to
mobile. So there is only device communication which
is point to point but with the passage of time our
requirements and different use cases are coming
into the market to cater down that new use
cases the new technology, which is Bluetooth low
energy has been introduced.
So in Bluetooth low energy, we have
a various new use cases like audio streaming
data transfer which are older one
use cases or the new use cases are location services device
networks wireless sensor networks and
Industry and in smart Agriculture and a
lot of other use cases. So now let's come to the device
communication topologies. Our point
to point is an older technique, which
is also available in Bluetooth. Low energy what we
see to new topologies
one is broadcast and the other is a mesh Network
and one of the major feature which
has been introduced in the ble is device positioning.
So it comes with the three
mods one is presence other is a distance
and the third is a direction which is not really
when in Bluetooth classic.
so now let's talk about some more specification
in detail if we talk about
About the frequency band both versions which
are classic and ble both
are using the same frequency ISM band.
So it is free to use there's a no issue with any
regulation and if we talk about
the channels, so there is a difference actually Bluetooth low
energy our 40 Channels with the two
megard space saying are three channels are
used for advertisement and 37 are data
channels.
And if we talk about Bluetooth classic, there are
79 Channels with one megahertz space
thing. So it makes more
chances for data occlusion as compared to the
Bluetooth low energy. And if we talk about how these
Technologies are using the channel, so they
are using fhss, which is
frequency hopping spreads as spreads Spectrum
technique.
Now if we talk about the data rates,
so the data rates have different test on
different layers, which
is specified in the table.
And previously we talk about the communication topologies. We
have three.
Communication topologies and Bluetooth low energy, which
are point-to-point broadcast and the mesh but in the Bluetooth classic,
we only have a point to point including piconnet
and if we talk about the positioning features
presence is used to
detect other node is available or not.
And for the direction finding we have a AOA and
aort. So what is AOA AOA
is angle of aperture and aod is
angle of departure and we
can calculate the distance of nodes by
using RSSI by the
way, which is not available in Bluetooth class six.
So that's why now researchers are prefering Bluetooth
low energy because it also consumes
less power as compared to the Bluetooth classic.
So now it's time to talk about the applications actually Bluetooth
have a wide variety of applications since
the Early times. But now with
the passage of time we have a new use cases such as
smart home and smart cities, so
Bluetooth is a potential use case
in the communication between devices like our smart
verbs are ble connected as well
as Wi-Fi connected but mostly organizations
are using ble for configuration with
the local nodes.
And in the cities people are using Bluetooth to
make a point to
minor. You can say that mesh Network social network,
and if we specifically talk about the location
tracking then the ble as the
use case as previously we discuss it is providing a
lot of new.
Properties which provides ease
to develop a new selections for the
researchers. So in the Parks malls and
the livestock Farms, it is good to use
ble to track the location and now it's
time for sports and medical with the
passage of time a new sensors are coming in the
market just like heart senses blood pressure senses.
A lot of different senses and sports ones are
using these sensors which are equipped with the ple or
Bluetooth and sending the data to the mobile same these
devices are used for patience. For
example, a sugar patient uses a
ble enabled device to monitor two four by
seven. It's sugar level which sounds related
to Cloud by his arm while twice
so the smart agriculture is a potential use case
as we have a very bigger fields and
it is difficult to deploy routers. So the
mesh network is a
Application or you can say that I use case which
is deployed by different researchers and
organization to communicate the
node with each other to avoid the extra
expense of a routers. Are you can
say that Central lights nodes and of course
industrial iOS and internet of thing is also a
potential use case for Bluetooth
low energy and Industry and
autonomous vehicle researchers and professional organizations
are using ble to communicate with each other.
So guys in the next video. We are going to develop a
mobile controlled Smart Lock, so guys see you in the next video. Have
a good day. Bye.