What is MQTT

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MQTT is a messaging protocol for the Internet of Things (IoT). We can use micro:bit to post and receive message to a MQTT broker via Wi-Fi with IoT:bit. It allows micro:bit to control or be controlled by other micro:bit or other IoT devices. The MQTT message contains a Topic and a Message. Usually, topic is for defining the category of the data, and the message is for holding the data.

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