The W55MH32 uses an infrared detection sensor to realize an industrial counter.

Project description

1. Introduction MQTT is a lightweight communication protocol based on TCP/IP, employing a publish-subscribe model, and widely used in the Internet of Things (IoT) field. MQTT's working principle revolves around three core components: Publishers, Brokers (also known as servers), and Subscribers. Publishers are responsible for sending messages to specific topics, while brokers receive these messages and forward them to all subscribers to that topic. This model allows asynchronous communication between devices, and devices do not need to be directly aware of each other's existence, thus…