Table of Contents The Role of Sensors in Industrial IoT PLCs: The Core Brain of Industrial Automation 2.1 Definition and Functions of PLCs 2.2 Comparison of Leading PLC Manufacturers Modbus Protocol Modbus Gateway vs. Modbus Router: Differences and Functions 4.1 Definitions of Modbus Gateway and Modbus Router 4.2 Functional Comparison 4.3 Why Modbus Gateways/Routers Are Essential Advantages of Wavetel IoT Modbus Gateway/Router Solutions 5.1 Advantages 5.2 Wavetel IoT Modbus G