How I Built a Real-Time Industrial PLC Monitoring Dashboard with Next.js and Modbus TCP(SCADA project)

How I Built a Real-Time Industrial PLC Monitoring Dashboard with Next.js and Modbus TCP As a Mechatronics Engineering student with 4 years of web development experience, I've always wanted to build something that combines both worlds. This project is exactly that — a real-time industrial SCADA-like dashboard that reads data from a CODESYS virtual PLC via Modbus TCP and displays it on a Next.js web interface. This is not a tutorial about blinking LEDs. This is how real industrial systems work. What I Built A full-stack industrial monitoring system with: CODESYS virtual PLC running a simulated conveyor belt process Modbus TCP communication between PLC and server Node.js + WebSockets for real-time data streaming Next.js dashboard with live charts and alarm management MongoDB for historical data storage JWT authentication to protect the dashboard Why This Project Matters In real factories, power plants and oil refineries, operators monitor industrial processes through SCADA systems (Superv