So now we have talked about this ambiguity messaging system, let's go deeper inside this protocol to
see how it functions.
So this is what the topology looks like for ambiguity.
You have multiple sensors that are sending data to a broker or a server.
And we have some interesting devices that are accessing this broker in order to read the information,
either from sensor one, two or three or all of them.
So we call all of these the sensors and the devices clients and we call the central server a broker.
So later, we're going to learn how to create a broker using ambiguity.
OK, so what is a broker exactly?
A broker is a server that distributes information to other clients.
It is the organizer of this whole ORCHESTRE.
A client is actually the interests.
And so all the interested devices either to publish or subscribe.
Now, what do I mean by publish?
So publish it, send information and subscribe to it information.
So all of these are like channels.
So sensory one is publishing a certain channel, something for sense or do something for the three and
the client can choose to subscribe or read from whichever channel you want.
It's exactly like a television show.
So you are watching TV and you are requesting channel to watch it.
And the difference is you can watch multiple channels at the same time or you can subscribe to it from
multiple channels at the same time, so you are not obliged to really read from everything the broker
has.
You can say, OK, I just want to read from censor one or from censor to or from censor three know a
topic is the name of the message.
So let's say censor one is sending a message called temperature sensor two is sending a topic God.
Vibration sensor three is sending a topic that is called maybe humidity.
And what we do is we publish over a topic.
So we are publishing data from sensor one of a temperature topic.
Right.
So the name of the topic is temperature.
OK, name of the channel that say the name of the channel is temperature and sensor one is sending over
temperature, which is publishing to a broker.
OK, subscribing is receiving something OK over a topic.
So you would say I want to subscribe to temperature, I want to subscribe to vibration or I want to
subscribe to humidity.
OK, so they are just some fancy words.
So subscribe meaning receive published means send and topic mean just the name of the channel that you
are sending to August from as simple as that.
Don't confuse yourself more than that though.
Publish, subscribe, receive and topic is just the name of the channel and the broker is actually the
central of the Sol Orchestre and the client is any sensor or device that is connected to this ROKR.
This is all you need to know about duty to start working with it through the next lecture.