This blog will use the ESP8266 as the publisher to send messages to a topic, which a subscriber will listen to, allowing us to control the on/off state of an LED light remotely.

This article will introduce how to use the data template in the sink to achieve "secondary processing" of the analysis results.

This project will implement connecting ESP8266 to a free public MQTT broker and programming ESP8266 by using Arduino IDE.

This example will demonstrate how to report the temperature and humidity data collected by the DHT11 sensor to the MQTT service in the cloud through the MQTT protocol and the NodeMCU based on ESP8266 , and show how the application subscribes to and processes the data.