Glossary
What is Edge computing?
Processing data close to where it is produced, on site, instead of sending everything to the server: filtering, calculations and local decisions.
One example is a deadband algorithm: a reading is only sent when it changes by more than a set amount, cutting data volume sharply without losing anything important. In HS-IIoT it cut network use by 90%.
Edge computing also keeps the site running when the link drops.
Related terms
- MQTT protocol
- A lightweight publish/subscribe messaging protocol through a broker, ideal for carrying sensor data from remote sites to a server.
- SCADA
- Supervisory control and data acquisition: collects readings from distributed controllers and sensors, presents them to operators, and manages alarms, commands and history.
- Modbus protocol
- A simple, open industrial protocol dating from 1979: a client asks, servers answer from numbered registers. It runs over RS485 (RTU) or Ethernet (TCP).