Update README.md

README.md

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-# WHW
+# Student Information Management System (MQTT based)
+
+## Introduction 
+This student information management system is an application based on MQTT protocol, which aims to realize the real-time publication and subscription of student information. Through MQTT protocol, the system can be easily extended to various devices and platforms to realize the rapid transmission and sharing of information.
+
+## Architecture overview
+The system consists of the following main components:
+
+   （1） MQTT Broker : Acts as a hub for information exchange, receiving and forwarding MQTT messages.
+   （2） Back-end server  : Processes student information data, provides RESTful apis to manage student information, and communicates with front-end clients via MQTT.
+   （3） Front-end client  : Use MQTT client library to communicate with MQTT Broker to achieve real-time display and update of student information.
+
+## Functional features
+
+   （1）Student information Management ** : Add, delete, correct and check the basic information of students.
+   （2）Real-time update ** : When the back-end server updates the student information, the front-end client can receive the update in real time.
+   （3） Multi-Platform support ** : The system supports various MQTT clients, such as mobile applications, Web applications and desktop applications.
+   （4）Scalability ** : Through the MQTT protocol, the system can be easily integrated with other MQTT devices or services.
+
+### Environmental preparation  
+
+   （1）Install MQTT Broker ( EMQX)
+   （2）Set up back-end server 
+   （3）Prepare the front-end client 
+
+### Configuration
+
+   （1）Configure the address and port of MQTT Broker.
+   （2）Configure the connection information between the back-end server and MQTT Broker.
+   （3）Configure front-end clients to connect to MQTT Broker.
+
+### Run
+
+   （1）Start MQTT Broker.
+   （2）Start the back-end server and ensure that the connection to MQTT Broker is normal.
+   （3）Start the front-end client and connect to MQTT Broker to subscribe to the appropriate student information topic.