Lesson 1 · 11 min
Sensors, Gateways & Protocols
Industrial IoT starts at the edge: sensors and PLCs speaking protocols like Modbus, OPC-UA and MQTT. Gateways aggregate and forward this data securely.
Choosing the right protocol balances latency, reliability and existing equipment — there is no one-size-fits-all.
Key takeaways
- Edge devices speak Modbus / OPC-UA / MQTT
- Gateways aggregate and secure data flows
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