Q: How to design an IoT gateway architecture for edge computing and cloud synchronization?
Answer
Edge computing IoT gateway architecture layers: (1) Data acquisition layer: protocol drivers (Modbus OPC-UA BACnet) running as microservices. (2) Edge processing layer: time-series database (InfluxDB TimescaleDB) + stream processing (Node-RED Apache Edgent). (3) Local control layer: rule engine for threshold alarms and local control loops (runs without cloud). (4) Cloud sync layer: MQTT/AMQP publisher with store-and-forward (buffer to SD/eMMC when offline). (5) Device management layer: LwM2M or TR-069 for firmware updates and remote config. Use Docker/Kubernetes on the gateway for microservice isolation. Ensure local autonomy: the gateway should continue operating during cloud disconnection. Implement MQTT QoS 1 with persistent sessions for guaranteed delivery.
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