Node-RED MQTT Connection using ESP32 - a Basic Tutorial

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Hello, everyone !
This video is about a basic walkthrough on establishing MQTT connection from ESP32 to Node-RED web application.

Below is the code for this video.

Check this link below to understand more about installing Node-RED.
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In this experiment, does that needs esp32 to be always connected to PC or it can be powered by battery??

mustafaaljumaili