WHAT IS MQTT and HOW IT WORKS

WHAT IS MQTT AND HOW IT WORKS?
MQTT also known as MQ Telemetry Transport or Message Queuing Telemetry Transport is a publish/subscribe protocol that allows edge-of-network devices to publish to a broker. Clients connect to this broker, which then mediates communication between the two devices. ... When another client publishes a message on a subscribed topic, the broker forwards the message to any client that has subscribed.
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