An Industrial IoT (IIoT) gateway is a networking device that acts as a bridge between Industrial Control Systems (ICS) and the internet, enabling communication between industrial devices and cloud-based applications. It serves as a connection point between the edge devices in a manufacturing or industrial environment and the central IT infrastructure.

With serial port or I/O controller or Ethernet port, built in industry protocol like Modbus RTU /TCP, UDP TCP, MQTT, transparent transmission to remotely monitor PLCs/HMIs.