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Abstract: This paper presents a novel approach to home automation utilizing the MQTT protocol. The system is implemented using an ESP32 node and a Node-RED server running on a Raspberry Pi, allowing ...

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MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol ideal for IoT (Internet of Things) applications due to its efficiency and low bandwidth requirements. It facilitates ...

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There comes an exception if the global variables are not defined and we try to read them and apply the configuration to MQTT via msg properties. 28 Sep 12:53:23 - [error] TypeError: Cannot read ...