🚀 Smart Device Backend (Java + Spring Boot)

A backend application built using Spring Boot, designed to manage smart home/IoT devices. The project supports adding devices, updating status, retrieving device lists, and storing all records in a MySQL database.

📌 Features

Create smart devices Get all devices Update device status Delete devices Stores data in MySQL database Uses Spring Data JPA (Hibernate ORM) Uses Enum for device type and device status Automatic timestamp updates (lastUpdated)

🛠️ Tech Stack

Backend: Java, Spring Boot Database: MySQL ORM: Hibernate (Spring Data JPA) Build Tool: Maven Tools: IntelliJ IDEA / VS Code, Postman, cURL

🗄️ Database Setup (MySQL) Create database CREATE DATABASE smart_devices_db;

Table is auto-created by Spring Boot Spring Boot + JPA will automatically create the table:

smart_devices ( id INT PRIMARY KEY AUTO_INCREMENT, device_name VARCHAR(255), device_type VARCHAR(50), status VARCHAR(20), battery_level INT, last_updated TIMESTAMP );

Configure application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/smart_devices_db spring.datasource.username=root spring.datasource.password=your_password

spring.jpa.hibernate.ddl-auto=update spring.jpa.show-sql=true

Running the Project Using Maven mvn spring-boot:run

Using Java java -jar target/smart-device-backend.jar

📡 API Endpoints

✅ 1. Add Device POST /api/devices Body { "deviceName": "Room Light", "deviceType": "LIGHT", "status": "ON", "batteryLevel": 80 }

✅ 2. Get All Devices GET /api/devices

✅ 3. Update Status PUT /api/devices/{id}/status?newStatus=OFF

✅ 4. Delete Device DELETE /api/devices/{id}

📊 Sample Response { "id": 1, "deviceName": "Room Light", "deviceType": "LIGHT", "status": "ON", "batteryLevel": 80, "lastUpdated": "2025-11-22T17:45:30" }

🧠 Purpose of the Project

This Java project demonstrates: Spring Boot REST API creation MySQL integration using JPA/Hibernate Practical OOP concepts Enum usage for device type & status CRUD operations with real database How backend systems manage IoT or Smart Devices

🚀 Future Enhancements Add JWT authentication Add device categories Add MQTT or WebSocket support Add frontend (React/Angular) Build mobile app for device control