what is MQTT?
MQTT == MQ Telemetry Transport
In a nutshell--->
A light weighted event and message oriented protocol allowing to asynchronously communicate efficiently across constr
ained networks to remote systems.
publish subscribe messaging protocol allowing a message to be published once multiple consumers(applications/devices) to receive the messages providing decoupling between the product and consumer(s)
A producer sends (publishes) a message (publication)on a topic(subject)
A consumer subscribes (make a subscription) for messages on a topic(subject)
A message server/broker matches publications to subcriptions
* If no matches the message is discarded
*If one or more matches the message is delivered to each matching subscriber/ consumer.
referenced from:- https://www.youtube.com/watch?v=-KNPXPmx88E
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